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Automotive Machining Companies

Last updated: January 2026

This directory lists 106 automotive machining companies across the United States, from high-volume powertrain specialists for engine blocks and transmission cases to precision low-volume manufacturers of custom driveline components and EV battery enclosure parts.

Buyers arriving here are typically solving for critical production bottlenecks, needing to meet aggressive New Product Introduction (NPI) timelines for vehicle launches, or aiming to reduce the total cost of ownership for complex machined assemblies. The challenge often revolves around achieving extremely tight tolerances on safety-critical components, such as valve spools or brake calipers, where micro-level surface finish and consistent material properties are paramount. Success hinges on a supplier's ability to consistently execute against detailed geometric dimensioning and tolerancing (GD&T) requirements and manage tooling amortization effectively across a program's lifecycle.

The automotive machining landscape encompasses a diverse array of supplier types. You’ll find shops specializing in large-format machining for engine blocks and cylinder heads, often utilizing dedicated transfer lines or automated horizontal machining centers (HMCs). Others excel in intricate, small-batch components like custom gears, where precision gear hobbing, grinding, and inspection are key. There are also suppliers focused on lightweighting, mastering the machining of advanced aluminum alloys and composites for EV applications, or those providing specialized honing and boring for hydraulic systems and internal engine components.

To ensure a smooth engagement, buyers should come prepared with fully documented CAD models, detailed GD&T callouts, material specifications, and clear annual volume forecasts spanning the program's life. Suppliers, in turn, expect a transparent statement of work, understanding of the program's commercial and technical requirements, and a commitment to long-term partnership rather than transactional engagements. Proactive communication regarding design for manufacturability (DFM) input and early engagement on PPAP strategy are highly valued.

A significant trend reshaping this category is the rapid acceleration of electrification, shifting demand from traditional ICE components towards precision parts for electric motors, battery thermal management systems, and new EV gearbox designs. This is driving investments in machining centers capable of handling advanced materials and complex geometries unique to electric drivetrains. Concurrently, increasing pressure for supply chain resilience and regional sourcing means more OEMs and Tier 1s are evaluating domestic machining capabilities, prioritizing those with robust quality management systems like IATF 16949 and strong lean manufacturing programs.

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Company Directory

106 companies nationwide

ABT Manufacturing LLC

Statesville, NC

Based in Statesville, NC, ABT Manufacturing LLC offers custom metal fabrication services, including CNC milling, turning, laser cutting, stamping, and deep drawing. The company serves diverse industries, notably providing precision components for automotive applications. They are ISO 9001:2015 certified, handling a wide range of materials.

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AC Manufacturing

San Jose, CA

Based in San Jose, CA, AC Manufacturing specializes in precision CNC machining, including 5-axis capabilities, for a variety of engineering-grade and exotic materials such as Kovar and Titanium. The company offers high-volume production machining, complete supply-chain management, and competitive pricing for manufacturing large quantities of precision machined parts.

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Advanced Tech Machining

Fremont, CA

Based in Fremont, CA, Advanced Tech Machining offers ISO 9001:2015 certified precision machining services. Specializing in CNC milling, CNC turning, and prototyping, they provide custom parts manufacturing. The company serves automotive, aerospace, medical, and electronics industries, partnering to transform complex designs into reality.

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Aero Mechanism Precision Inc.

Chatsworth, CA

Based in Chatsworth, CA, Aero Mechanism Precision Inc. specializes in precision CNC machining, offering milling and turning services. With over 35 years of experience, the company is ISO 9001:2015 and AS9100 certified, ensuring high-quality components. They utilize skilled craftsmen and advanced equipment for both short-run and mass production, handling intricate shapes.

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AJ Solutions Machining

Fremont, CA

Based in Fremont, CA, AJ Solutions Machining is an ISO Certified provider of precision CNC machining services. They specialize in both prototype and production CNC milling and turning, offering close tolerance capabilities and rapid turnaround. The company works with diverse materials like metals and plastics, serving industries including aerospace, automation, and defense.

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Allegiance Auto Machine Performance

Fresno, CA

Based in Fresno, CA, Allegiance Auto Machine Performance provides specialized automotive machining services. The company focuses on enhancing vehicle performance through precision machine work. They cater to customers seeking high-quality engine and component machining for various automotive applications.

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Advanced Machining Solutions, Inc.

Chula Vista, CA

Advanced Machining Solutions, Inc. based in Chula Vista, CA, provides high-quality CNC machining services for components and products. Established in 2005, their personnel bring over 30 years of industry experience, delivering superior service with quick turnarounds and fair costs for diverse industrial requirements.

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Advanced Machining & Tooling

Poway, CA

Advanced Machining & Tooling (AMT) based in Poway, CA, specializes in high-precision CNC machining, turning, waterjet, and EDM for complex components. Operating a 31,500 sq. ft. facility, they achieve +/-.0001" tolerances for production quantities across all industries. AMT is ISO 9001, AS 9100 certified, and ITAR registered.

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Atech Manufacturing, Inc.

San Jose, CA

Based in San Jose, CA, Atech Manufacturing, Inc. provides high-precision CNC machining solutions for prototypes to production runs. They utilize traditional metals, specialized alloys, and industrial plastics, serving diverse sectors including automotive, aerospace/satellite, medical, semiconductor, defense, robotics, and optic devices.

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Auto Machine Specialties

Fresno, CA

Based in Fresno, CA, Auto Machine Specialties operates a full-service engine machine shop. They recondition engines and specialize in crafting high-performance engines, leveraging a legacy since 1984. The company also provides comprehensive machining solutions for industrial engines, including heavy-duty diesel and power generators.

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Baxter Machine

Jackson, MI

Based in Jackson, MI, Baxter Machine specializes in high-volume automotive CNC machining and grinding services. They offer precision CNC turning, milling, and fine grinding for complex parts, including gears, shafts, and powder metal bushings. Utilizing advanced equipment, they ensure tight tolerances for various industrial applications.

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Bracalente

Based in Trumbauersville, PA, Bracalente provides precision manufacturing solutions from its U.S. and China facilities. They produce key component parts for diverse sectors, including Electric Vehicle, Aerospace, and Industrial. Bracalente is a strategic design partner, delivering large volume and complex precision machining projects.

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Camco Precision Machining

Union Grove, WI

Based in Union Grove, WI, Camco Precision Machining provides high-quality, precision CNC machining services for automotive parts, OEMs, and manufacturers. Specializing in Swiss machining, high volume production, and gear blank machining, they offer advanced turning and milling to deliver complex, custom parts quickly and reliably.

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Clint Precision Mfg., Inc.

San Diego, CA

Based in San Diego, CA, Clint Precision Mfg. Inc. specializes in high-tolerance precision CNC machining, including CNC lathe and milling, waterjet cutting, and certified welding. They provide prototype and production services, prominently serving the automotive, aerospace, military, and medical industries.

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CNC Manufacturing

Temecula, CA

Based in Temecula, CA, CNC Manufacturing specializes in high-precision CNC machining services. The company works with various aerospace-grade materials, including titanium, stainless steel, aluminum, and brass, for diverse industries. They offer mills and lathes, serving the automotive, aerospace, military, and firearms sectors, backed by ISO 9001:2015 certification and CAD/CAM capabilities.

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CNC Manufacturing, Inc.

Missouri City, TX

Based in Missouri City, TX, CNC Manufacturing, Inc. provides turnkey machining services for products requiring extreme durability and precision in harsh environments. The company operates nine machining centers and eighteen lathes, including large-capacity Okuma models that handle parts up to 360 inches long. They are ISO 9001:2015 certified.

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Contract Machining and Manufacturing Inc.

Lexington, KY

Based in Lexington, KY, Contract Machining and Manufacturing Inc. provides precision CNC machining services for diverse industries like automotive, heavy truck, HVAC, mining, and drilling. They specialize in production machining, facing, centering, sawing, grinding, welding, and fabrication, delivering high-accuracy parts backed by a comprehensive quality control system.

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Custom Performance Racing Engines

Compton, CA

Based in Compton, CA, Custom Performance Racing Engines engineers and manufactures high-performance racing engines and billet aluminum automotive components. They utilize in-house design, prototyping, testing, and CNC manufacturing services for custom, dyno-proven products serving demanding racers and the performance automotive industry.

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Eleat Prototypes & Tooling LLC

Haslet, TX

Based in Haslet, TX, Eleat Prototypes & Tooling LLC offers custom CNC machining services for automotive, aircraft, oil & gas, and medical industries. They provide production runs, prototyping, fixtures, and reverse engineering. With over 35 years of experience, the company delivers comprehensive manufacturing support for precision parts.

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Engines Xtreme

Lewisville, TX

Based in Lewisville, TX, Engines Xtreme specializes in full-line engine remanufacturing and comprehensive automotive machine shop services. They offer block preparation, crankshaft grinding, connecting rod resizing, and remanufacture cylinder heads, short blocks, and long blocks. Products are meticulously machined to factory specifications by experienced technicians, ensuring high quality and performance.

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FedTech Inc.

Mounds View, MN

Based in Mounds View, MN, FedTech Inc. provides precision manufacturing services including waterjet, laser cutting, and machining. They specialize in producing custom automotive parts and high-precision components from prototype to production. The company operates under ISO 9001:2015 quality standards.

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Micro Precision Components, Inc.

Bloomfield, NY

Based in Bloomfield, NY, Micro Precision Components specializes in high precision machining, offering Swiss screw and CNC machining services. They produce tight-tolerance micro parts like rollers, bearings, shafts, and bushings for the automotive industry, ensuring superior, documented quality and on-time delivery.

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Garland Service Company

Garland, TX

Based in Garland, TX, Garland Service Company offers CNC machining services for complex precision parts. They use milling and turning machines, automation, and robotics, working with various metal and composite materials. The company specializes in holding tight tolerances for diverse applications, including automotive components.

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Precision Advanced Manufacturing

Anaheim, CA

Based in Anaheim, CA, Precision Advanced Manufacturing provides a full portfolio of cutting, machining, and metal fabrication capabilities specifically for automotive and motorsports OEMs and suppliers. Beyond waterjet services, the company operates a fully capable machine shop with advanced equipment, holding ISO 9001:2015 and AS9100D certifications.

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Halcyon Manufacturing

San Jose, CA

Based in San Jose, CA, Halcyon Manufacturing is a full-service contract machining shop. They provide precision 5-axis machining, 7-axis turning, rapid prototyping, and high-volume production. Capabilities include engineering, boring, forming, welding, plating, heat treatment, and assembly services for a wide range of industrial applications.

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Hasselgren Engineering Inc

Berkeley, CA

Based in Berkeley, CA, Hasselgren Engineering Inc. specializes in high-performance combustion engine components. The company provides precision automotive machining services, fabrication, engine building, design, and sales. Capabilities include CNC machine shop operations, rebuilds, tuning, and dyno testing for various automotive applications.

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High Speed CNC

Santa Clara, CA

Based in Santa Clara, CA, High Speed CNC provides ultra-precision, close-tolerance 4 and 5-axis machining. They handle complex prototype and production parts using diverse materials, including exotic alloys. Certified AS9100 and ISO 9001, they serve demanding industrial clients.

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Howlett Machine Works

Berkeley, CA

Based in Berkeley, CA, Howlett Machine Works offers precision machining and fabrication services for various industries, including automotive, aerospace, and medical. Utilizing advanced CNC machinery and manual tools, they produce custom prototypes and small batch components with tight tolerances from diverse materials.

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Jim's Automotive Machine Shop, Inc.

Gill, CO

Based in Gill, CO, Jim's Automotive Machine Shop, Inc. (JAMSI) specializes in automotive machining services. With over 35 years of experience, the company is a trusted source for automotive engine parts, serving the industry with expertise. JAMSI is a proud member of AERA.

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Johnson County Machine Shop & Auto

Cleburne, TX

Based in Cleburne, TX, Johnson County Machine Shop & Auto is a full-service facility specializing in custom machining for automotive applications. They provide quality craftsmanship and affordable rates, offering solutions for everything from drivelines and U-bolts to hard-to-find and obsolete parts, catering to diverse project needs.

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KAD Models & Prototypes Inc

Alameda, CA

Based in Alameda, CA, KAD Models & Prototypes Inc offers comprehensive prototype to production precision machining services. The company also specializes in quick-turn silicone molding, assisting clients in developing and manufacturing diverse products from initial design concepts through to final production runs for various industries.

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Kadon Precision Machining

Rockford, IL

Based in Rockford, IL, Kadon Precision Machining specializes in high-precision machining services. They manufacture custom parts for diverse sectors including automotive, aerospace, agriculture, defense, electronics, energy, and firearms. The company utilizes advanced machining techniques to deliver custom components for industrial and commercial clients.

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Katech Engineering LLC

Katech Engineering LLC specializes in designing and manufacturing race-proven engines and high-performance automotive parts. With a legacy rooted in motorsports since 1977, the company is known for building engines for prominent teams like the GM Corvette Racing team, serving the automotive performance industry.

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LN Engineering LLC

Momence, IL

Based in Momence, IL, LN Engineering LLC offers comprehensive engine machining services, specializing in Porsche rebuild programs. Their capabilities include piston ring end gapping, crankshaft inspection, magnaflux, cleaning, and documentation. They also provide quality Porsche cylinder heads and support RND Engines and Flat 6 Innovations.

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LSR Precision

Sheridan, WY

Based in Sheridan, WY, LSR Precision provides comprehensive manufacturing solutions, including CNC machining, 3D printing, and sheet metal fabrication. Specializing in rapid prototyping and high-volume production, they work with various metals and plastics. The ISO 9001 certified company offers quality manufacturing services.

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Machine Service, Inc.

Waukesha, WI

Based in Waukesha, WI, Machine Service, Inc. (MSI) specializes in CNC machining services for the automotive industry. They manufacture precision drivelines, driveshafts, transmissions, and various power transmission components. MSI serves vehicle manufacturers globally, offering industrial drive shaft solutions and related parts.

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Maroney Company, LLC

Northridge, CA

Based in Northridge, CA, Maroney Company, LLC provides ultra-precision machining and Electrical Discharge Machining (EDM) services. Founded in 1955, this AS9100 and ISO 9001 certified company offers a wide range of capabilities including milling, grinding, and honing, managing complex projects from concept to completion.

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Master Precision Machining, Inc.

Santa Clara, CA

Based in Santa Clara, CA, Master Precision Machining, Inc. offers precision machining services for custom designs. They operate advanced KERN Pyramid Nano and Hermle 5-Axis CNC machines, supported by Zeiss CMM scanning and Zygo surface finish capabilities. Certified AS9100D and ISO 9001:2015, the company ensures high-quality manufacturing.

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MES Inc.

Columbus, OH

Based in Columbus, OH, MES Inc. provides precision-engineered manufacturing solutions for electric vehicles. The company specializes in producing components through processes like die castings, forgings, extrusions, and investment casting, delivering parts that meet stringent automotive specifications.

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M&M Automatic

Jackson, MI

M&M Automatic, based in Jackson, MI, is a family-owned contract machining provider. They specialize in CNC milling, CNC turning, and screw machining, offering grinding and broaching capabilities. Serving industries like heavy machinery, transportation, and defense, the company provides rapid turnaround from prototype to production.

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Mountune USA

Carson, CA

Mountune USA, based in Carson, CA, operates an in-house machining center dedicated to high-performance automotive applications. They specialize in precision engine component machining, including cylinder head porting, block work, and custom part manufacturing. Mountune USA provides advanced automotive machining and engine building solutions.

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MW Components

Charlotte, NC

MW Components offers precision machining and custom manufacturing, specializing in electric vehicle parts and industrial components. With over 20 US-based facilities, they provide custom springs, fasteners, bellows, shims, and other metal parts, supported by rapid quote responses and engineering.

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North Dallas CNC Mach Shop

Rowlett, TX

Based in Rowlett, TX, North Dallas CNC Mach Shop offers full-service CNC machining for prototypes to production orders. Leveraging over 100 years of combined experience, they utilize equipment like Hurco CNC Lathes and Leadwell CNC Mills to meet diverse client needs.

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Monroe OEM LLC

San Diego, CA

Monroe OEM LLC is an ISO 9001:2015 certified manufacturer specializing in custom machining and fabrication services. They produce a wide range of industrial components, including fasteners and hinges. Serving the automotive, aerospace, defense, and medical industries, Monroe OEM provides precision manufacturing solutions from its San Diego facility.

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Patterson Precision Manufacturing, Inc.

Norton Shores, MI

Patterson Precision Manufacturing, Inc. offers precision machining, tooling, and die-making services from Norton Shores, MI. Specializing in CNC milling, lathe work, and 5-axis machining, they serve aerospace and automotive industries with custom parts. The company is AS9100D, NADCAP, and ISO 9001 certified.

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Precision Engine Machine Company

Precision Engine Machine Company operates as a full-service automotive machine shop. This company specializes in automotive machining services, including the capability to build custom engines designed to meet various performance requirements for its clients. They provide comprehensive solutions for engine building and related automotive components.

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Precision Enterprises

Somonauk, IL

Precision Enterprises, based in Somonauk, IL, is an aluminum sand casting foundry and machine shop. They provide precision machined castings utilizing over 25 in-house CNC milling and turning centers. With 70 years of expertise, they work with various materials and offer secondary finishes like wet paint and powder coating.

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Production Saw and Machine

Clarklake, MI

Based in Clarklake, MI, Production Saw and Machine offers production sawing and CNC machining services to OEMs and Tier 1 manufacturers. Their ISO 9001:2015 certified 157,000-square-foot facility processes steel, tubing, pipe, and forged bar stock. They support programs from short-run development to full-scale production.

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Quest Industries Inc.

Lapeer, MI

Based in Lapeer, MI, Quest Industries Inc. offers tight tolerance, short-run production, and prototype machining, alongside precision turning. They also provide mold making services for plastic injection and rubber. Serving the automotive, medical, and aerospace sectors, Quest Industries is ISO 9001:2015 and IATF 16949:2016 certified.

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Rapid Axis

Redwood City, CA

Based in Redwood City, CA, Rapid Axis provides high-precision parts and manufacturing services, emphasizing short lead times. Their capabilities include 3, 4, and 5 Axis CNC Machining, sheet metal, DMLS, injection molding, urethane casting, and 3D printing. Rapid Axis supports both prototyping and production for diverse industrial needs.

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Regis Manufacturing Co

Dallas, TX

Based in Dallas, TX, Regis Manufacturing Co. is a precision machining and manufacturing company. They specialize in CNC milling, turning, grinding, and gear manufacturing, serving diverse industries including automotive, aerospace, medical, and oil & gas. The company provides comprehensive solutions from fabrication to assembly.

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RevPart

RevPart provides rapid prototyping and manufacturing services, including 3D printing, CNC machining for plastics and metals, and injection molding. They support projects from short-run to production volumes, serving diverse sectors such as automotive, medical, aerospace, and industrial clients.

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R&L Engines

Dover, NH

Based in Dover, NH, R&L Engines operates a 6,000 sq ft engine rebuilding and machining facility. Specializing in remanufacturing and restoring classic, marine, and vintage engines from the 1920s, they use CNC block blueprinting. ASE-certified machinists produce custom components for high-performance, race, and marine applications.

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Roberson Machine Company

Bland, MO

Based in Bland, MO, Roberson Machine Company provides precision CNC machining services from prototype to production. Capabilities include multi-axis CNC milling, turning, wire EDM, and 3D printing. They serve diverse industries such as automotive, aerospace, medical, energy, and robotics with high-yield manufacturing.

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RPM Engine & Machine

Medina, OH

Based in Medina, OH, RPM Engine & Machine is a full-service automotive machine shop. They offer comprehensive engine rebuilding and machining methods, including block machining, cylinder head services, and crankshaft, rod, and piston work. Services cover automotive, truck, hi-performance, racing, classic, antique, and power sports engines.

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Savannah Precision Machining

Waunakee, WI

Based in Waunakee, WI, Savannah Precision Machining offers precision CNC milling and turning services. They provide prototype machining, reverse engineering, and inspection capabilities for various industries. The company specializes in automotive machining, also serving the scientific, analytical, medical, and telecommunications sectors with high-quality components.

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Scroggins Machine

Houston, TX

Based in Houston, TX, Scroggins Machine specializes in automotive engine machining and reconditioning. Services include block work such as boring, decking, and crank grinding, plus cylinder head resurfacing, valve jobs, and porting. They also offer connecting rod reconditioning, engine balancing, custom performance engine design, and engine assembly.

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SD Prototypes Manufacturing Solutions, Inc.

San Diego, CA

Based in San Diego, CA, SD Prototypes Manufacturing Solutions, Inc. offers precision machining, prototype manufacturing, and comprehensive CNC machining services. Capabilities include Wire EDM, Small Hole EDM Drilling, and versatile 2, 3, and 4-axis CNC machining, plus 2-axis CNC turning. They maintain high quality standards with calibrated equipment and rigorous operating procedures.

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Steadfast Machining Co., LLC

Oak Point, TX

Based in Oak Point, TX, Steadfast Machining Co. LLC provides precision 3 and 4 axis milling, lathe turning, and rapid prototyping services. They offer competitive production runs, thread and keyway repair, engraving, and gearbox machining support. Specializing in quality parts with on-time turnarounds, they also handle larger shaft manufacturing.

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Stecker Machine Company

Manitowoc, WI

Based in Manitowoc, WI, Stecker Machine Company is a family-owned CNC machine shop providing innovative solutions to manufacturing challenges. They specialize in complex problem-solving and offer world-class CNC machining services, including capabilities that benefit electric vehicle manufacturing projects.

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Texas Engine Machine

Llano, TX

Based in Llano, TX, Texas Engine Machine provides specialized engine machining services. They cater to automotive, diesel, marine, and powersports engines, including motorcycles, UTVs, and ATVs. Capabilities include soda blasting, balancing, and supplying engine parts, addressing a diverse range of engine needs.

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Tech Manufacturing & Machining, Inc.

Turlock, CA

Tech Manufacturing & Machining, Inc. based in Turlock, CA, specializes in precision CNC machining and fabrication. They offer comprehensive services including CNC milling, turning, and welding for prototypes and production. Working with diverse metals and plastics, the company delivers high-quality components for various industrial applications.

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Trace-A-Matic Corporation

Brookfield, WI

Based in Brookfield, WI, Trace-A-Matic Corporation is a precision machine shop providing high-volume, tier 1 and 2 automotive machining services. They utilize state-of-the-art CNC technology and massive capacity to produce complex, intricate components for automotive, aerospace, defense, and heavy equipment markets, among others.

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Ultimate Precision Tech

Houston, TX

Ultimate Precision Tech is a Houston, Texas-based machine shop providing comprehensive CNC machining services. The company specializes in manufacturing custom parts and components, from prototyping to production assembly. With a large array of CNC lathes, mills, and EDM machines, they serve demanding industries including automotive, aerospace, oil and gas, and pharmaceutical sectors.

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United CNC Machining

Auburn Hills, MI

Based in Auburn Hills, MI, United CNC Machining offers 45 years of expertise in advanced multi-axis CNC machining, including 5-axis milling and multi-axis turning. They specialize in exotic alloys, providing comprehensive solutions from prototyping to production for various industries. The company is CMMC 2.0+ and AS9100D/ISO 13485 certified.

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Vinaco Precision Machining, LLC

Chatsworth, CA

Based in Chatsworth, CA, Vinaco Precision Machining, LLC is an ISO 9001:2015 and AS9100 Rev. D certified CNC machine shop. Specializing in complex, close-tolerance precision machining for low and high volume production, they serve Aerospace, Defense, Telecommunications, Power, and various Commercial industries.

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Waggoner Manufacturing

Austin, TX

Based in Austin, TX, Waggoner Manufacturing offers precision CNC machining and fabrication services. The company specializes in producing high-accuracy parts with tolerances up to.0002 inches. They handle small batch runs, from single prototypes to thousands of components, ensuring quality checks throughout the manufacturing process.

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Machining Solutions Inc

Torrance, CA

Based in Torrance, CA, Machining Solutions Inc. provides precision CNC machining, fabrication, and assembly services. They specialize in complex components for the automotive, aerospace, medical, and industrial sectors, operating an ISO 9001:2015 certified facility.

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Specialty Precision Machining

Stockton, CA

Based in Stockton, CA, Specialty Precision Machining provides high-tolerance precision CNC machining. They offer cutting, turning, threading, and reaming for machine components, fasteners, and fittings. Serving diverse sectors like electronics, medical, and oil and gas, their capabilities are directly applicable for automotive industry parts.

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Tuson Corporation

Vernon Hills, IL

Based in Vernon Hills, IL, Tuson Corporation manufactures custom, precision-machined components, assemblies, and systems, primarily from metals. Certified to ISO 9001:2015 and IATF 16949:2016, they provide high-quality manufacturing for automotive and industrial applications, offering both USA and Pacific Rim production capabilities.

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ACM Machining, Inc

Rancho Cordova, CA

Based in Rancho Cordova, CA, ACM Machining, Inc. is a contract manufacturer specializing in machined products since 1974. The company predominantly serves the automotive, oil, and gas industries, holding ISO 9001-2015 registration. ACM Machining delivers high-value, quality components to clients worldwide.

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A Precision Machining Corporation

Shingle Springs, CA

Based in Shingle Springs, CA, A Precision Machining Corporation (APMC) is a machine shop specializing in precision CNC milling and turning. They provide prototyping, short-run production, and large production-run quantities of machined parts. APMC serves diverse sectors including the automotive, aerospace, defense, medical, and semiconductor industries.

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Astro Machine Works

Based in Ephrata, PA, Astro Machine Works specializes in precision CNC and 5-axis machining services. They offer custom manufacturing solutions and precision parts, capable of creating complex shapes with tight tolerances. Their expertise serves demanding industries, including automotive, aerospace, and medical applications.

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Austin Precision Machining and Manufacturing

Pflugerville, TX

Based in Pflugerville, TX, Austin Precision Machining and Manufacturing is a precision CNC machine shop offering comprehensive manufacturing solutions. They specialize in CNC milling, turning, fabrication, 3D printing, and assembly. The company provides contract manufacturing services to businesses, emphasizing quality, quick turnaround, and consistent production.

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Automatic Components

Los Angeles, CA

Automatic Components is a Los Angeles, CA-based high-production machine shop. They offer industrial machining services for automotive, aerospace, energy, and medical sectors. Utilizing CNC lathes, mills, and multi-spindle screw machines, they produce quality parts. The company is ISO 9001:2015 certified.

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Automotive Machine & Supply Inc.

Cleburne, TX

Based in Cleburne, TX, Automotive Machine & Supply Inc. provides precision machine work and quality parts for automotive, truck, and high-performance racing engines. They also offer motorcycle, ATV, and industrial machining, including prototyping and custom manufacturing. Capabilities span CNC and manual lathes, vertical machining centers, grinders, honing, and EDM services.

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CED Services

Oxford, CT

Based in Oxford, CT, CED Services offers custom CNC manufacturing solutions, encompassing multi-axis machining, turning, milling, cutting, welding, and finishing. They provide expert parts assembly, alongside consulting, engineering, and development. With a focus on precision and complex components, CED services the automotive industry.

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CNC Machining LLC

Haslet, TX

Based in Haslet, TX, CNC Machining LLC offers precision CNC machining services, including milling, turning, Swiss machining, and wire EDM. They cater to a range of industries such as aerospace, medical, defense, and automotive. The company works with diverse materials, providing comprehensive manufacturing solutions for complex components.

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Continental Manufacturing

Dallas, TX

Based in Dallas, TX, Continental Manufacturing provides precision CNC machining and manufacturing services for OEM and aftermarket automotive components. The company specializes in tight tolerance and high-volume multi-spindle screw machining and advanced CNC turning services, serving automotive, agriculture, consumer, and industrial applications.

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Delga Prototype & Engineering Inc

Canoga Park, CA

Based in Canoga Park, CA, Delga Prototype & Engineering Inc specializes in precision machining for prototypes and custom components. The company offers quick turnaround on parts made from various metals, including exotic materials like Inconel and Kovar, serving industrial and engineering needs.

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E.J. Basler Co.

Schiller Park, IL

Based in Schiller Park, IL, E.J. Basler Co. is a high-volume precision machine shop specializing in automotive components manufacturing. They provide CNC machining, Hydromat, Multi-Spindle, and Swiss Screw machining services. The company focuses on delivering high-quality, cost-effective custom projects with a proven zero-defect quality system for precision machined parts.

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eMachineShop

Mahwah, NJ

Based in Mahwah, NJ, eMachineShop provides custom manufacturing services, specializing in precision CNC milling and turning for metal and plastic parts. They also offer sheet metal fabrication, injection molding, and 3D printing. The company supports rapid prototyping and full production runs across a wide range of materials.

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Four Points Platinum Machining and Manufacturing

Pflugerville, TX

Based in Pflugerville, TX, Four Points Platinum Machining and Manufacturing operates a precision CNC machine shop. They offer comprehensive manufacturing solutions, including CNC milling and turning, assembly, engineering, fabrication, and 3D printing. The company provides contract manufacturing services with a focus on quality control and inventory readiness.

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Golen Engine

Hudson, NH

Based in Hudson, NH, Golen Engine operates a full-service automotive machine shop. The company specializes in designing and building precision components for vehicle performance, offering comprehensive machining services to enhance engine capabilities and achieve maximum performance.

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Grand Machine Shop

Dallas, TX

Based in Dallas, TX, Grand Machine Shop specializes in engine rectification and reconstruction for both diesel and gasoline internal combustion engines. They offer comprehensive machining services for critical components such as engine blocks, crankshafts, and cylinder heads, in addition to complete engine assembly for a wide range of vehicles and industrial applications.

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Greystone

Providence, RI

Based in Providence, RI, Greystone specializes in high-volume automotive machining and plating. The company produces 130 million automotive parts annually from its US facilities. Capabilities include precision CNC, Hydromat rotary transfer, multi-spindle, and single-spindle machining, complemented by comprehensive electroplating and anodizing services.

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Hawk CNC Corp.

Oakland, CA

Based in Oakland, CA, Hawk CNC Corp. is a precision machine shop specializing in 3 and 5-axis CNC machining, rapid prototyping, and product development. They offer quick-turnaround manufacturing, fabrication, and welding services for short production runs, serving the San Francisco Bay Area and nationwide.

Phone available

H-N-H Automotive Machine Shop

Haltom City, TX

Based in Haltom City, TX, H-N-H Automotive Machine Shop has provided full-service automotive machining since 1995. Capabilities include surface milling, cylinder bore honing, crankshaft polishing, valve jobs, and block preparation. The company specializes in custom engine building, offering comprehensive services for various applications and racing needs, ensuring high-quality results.

Phone available

Kaufman Manufacturing

Manitowoc, WI

Based in Manitowoc, WI, Kaufman Manufacturing provides versatile precision contract machining services for specialized projects. They operate as a subcontractor, producing parts to specification and on time for mission-critical manufacturing applications. The company also engineers and builds custom CNC machine tools, backed by ISO 9001:2015 certification for quality.

Phone available

Star Machine

Emeryville, CA

Based in Emeryville, CA, Star Machine is a precision automotive machine shop. The company specializes in providing machining services, particularly catering to projects involving hot-rodding and custom cars. They focus on delivering high-precision work for various custom vehicle needs within the automotive industry.

Phone available

M45 Manufacturing

Auburn, CA

M45 Manufacturing, based in Auburn, CA, specializes in high-precision CNC machining with advanced Haas equipment, including 5-axis capabilities. They provide superior quality and efficiency for demanding projects, serving industries like automotive, aerospace, defense, and medical devices.

Phone available

Preece Machining and Assembly

Boulder, CO

Based in Boulder, CO, Preece Machining and Assembly specializes in precision milling and high-volume production machining. They serve diverse sectors including aerospace, semiconductor, commercial, life sciences, and medical industries. The company is AS9100:2016 and ISO 9001:2015 certified, ensuring quality and ITAR compliance for manufactured parts.

Phone available

Mahuta Tool Corp.

Germantown, WI

Mahuta Tool Corp. based in Germantown, WI, is a CNC machine shop offering turning, milling, multi-axis machining, and prototyping. They manufacture custom automotive and motorcycle parts, tools, assemblies, and fixtures. The company provides a range of secondary services, committed to developing long-term partnerships with industrial clients.

Phone available

Moseys Production Machinists

Anaheim, CA

Based in Anaheim, CA, Moseys Production Machinists provides precision CNC, production, and Swiss machining services for the automotive industry. They offer continuous 24/7 production for parts 0.050″ to 24″, handling diverse materials including cast iron and aluminum. Secondary processing and supply chain management are also key offerings.

Phone available

Panek Precision

Northbrook, IL

Panek Precision, based in Northbrook, IL, is a precision CNC machine shop specializing in automotive machined parts. The company offers extensive CNC machining capabilities, including turning, vertical, and horizontal machining, along with multi-spindle screw machining and prototyping. Additional services encompass metal tube cutting, end forming, 4-slide stamping, and assembly.

Phone available

Precision CNC Machining, Inc.

Oxnard, CA

Precision CNC Machining, Inc. based in Oxnard, CA, offers comprehensive CNC machining services. The company specializes in manufacturing high-precision components using milling and turning processes. They provide prototyping, short-run, and production volume manufacturing for diverse materials, making them suitable for various industrial applications including automotive.

Phone available

Precision Machine Shop

Houston, TX

Precision Machine Shop, based in Houston, TX, specializes in high-quality precision machining services. They offer CNC machining, milling, turning, grinding, and fabrication. This company provides custom components for various sectors, including automotive, oil & gas, aerospace, and medical industries.

Phone available

RCO Engineering

Roseville, MI

Based in Roseville, MI, RCO Engineering specializes in rapid prototyping and low-volume manufacturing for the automotive industry. They offer a range of capabilities including CNC tooling, metal stamping, plastic injection molding, and molded/milled foam. Certified with IATF 16949:2016, RCO provides comprehensive interior and exterior component manufacturing services.

Phone available

ARRK

San Diego, CA

ARRK is a product development company specializing in rapid prototyping and custom manufacturing services. They provide custom machining and fabrication using various materials, supporting clients from initial prototype stages through full production. ARRK focuses on accelerating products to market with extensive product development expertise.

Phone available

A&M Machine Shop CNC Machining

Oxnard, CA

Based in Oxnard, CA, A&M Machine Shop CNC Machining offers custom CNC machining services. They specialize in precision manufacturing, providing capabilities such as milling and turning. This company serves various industrial clients, potentially including the automotive sector, for both prototype development and production runs.

No contact on file

MFG-Solution

MFG-Solution specializes in CNC precision machining, delivering high-accuracy and wear-resistant automotive transmission components. They manufacture critical parts like gears and shafts, serving the automotive industry with robust performance and durability for demanding applications.

No contact on file

Michigan Motor Exchange

Waterford, MI

Michigan Motor Exchange specializes in quality engine rebuilding services, backed by over 75 years of experience. Based in Waterford, MI, the company employs ASE-Certified Technicians who perform expert automotive machining and restoration. They provide essential services for vehicle performance, ensuring high-quality rebuilt engines for their customers.

No contact on file

Pacific Prototype Manufacturing, Inc.

San Jose, CA

Based in San Jose, CA, Pacific Prototype Manufacturing, Inc. is a veteran-owned company specializing in precision CNC machining, metal fabrication, welding, finishing, and assembly services. They offer prototyping and production for diverse industries including automotive, semiconductor, medical, and aerospace.

No contact on file

Precise Cast

Delray Beach, FL

Based in Delray Beach, FL, Precise Cast specializes in precision casting and CNC machining services for the automotive industry. They fabricate early-stage vehicle manufacturing parts and components, offering comprehensive solutions from prototyping to finishing. In-house capabilities also include heat treatment, surface finishing, and assembly.

No contact on file

Rick's Machine Shop

Pearland, TX

Based in Pearland, TX, Rick's Machine Shop operates as a full-service provider specializing in engine machining and balancing. They offer comprehensive rebuilding services for automotive, marine, and industrial applications, including cylinder head and engine block rebuilding, crankshaft grinding, rod reconditioning, and custom machine work for performance engines.

No contact on file

Wegner Automotive

Wegner Automotive operates a full-service, state-of-the-art CNC shop, providing contract machining capabilities to B2B customers. The company specializes in delivering precision automotive machining solutions.

No contact on file

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How to Choose a Company

  • For any production-intent component, verify the supplier holds current IATF 16949 certification and has a robust PPAP submission process, including documented FMEA, control plans, and measurement system analysis (MSA) capabilities.
  • Assess their specific machining cell capabilities – for complex valve bodies, ensure multi-pallet horizontal machining centers (HMCs) with automated tool changers are available, or for large engine blocks, confirm they have large-format gantry mills and specialized boring equipment.
  • Be wary of suppliers who are vague about tooling ownership and maintenance agreements; inadequate or unclear terms can lead to significant cost overruns or production delays down the line, especially for dedicated fixtures and perishable cutting tools required for high-volume serial production.
  • Insist on clear component traceability protocols, from raw material lot numbers through all machining operations to final inspection, and audit their CMM programming and calibration records, especially for critical dimensions requiring tight geometric dimensioning and tolerancing (GD&T).

Frequently Asked Questions

Do all automotive machining suppliers require IATF 16949 certification?

While IATF 16949 is the gold standard for production automotive parts, especially for direct OEM or Tier 1 supply, it's not strictly mandated for every scenario. For rapid prototyping or R&D quantities, an ISO 9001 certification with a strong internal quality system might suffice. However, if your prototype is intended to transition into production, opting for an IATF 16949 certified supplier from the outset simplifies the eventual PPAP process and ensures their quality system is already aligned with automotive industry expectations.

What should I expect regarding tooling costs and ownership for custom automotive machined parts?

Tooling costs are a significant non-recurring engineering (NRE) expense for custom parts, covering dedicated fixtures, jigs, gages, and sometimes specialized cutting tools. Expect a clear breakdown of these costs and a detailed agreement on tooling ownership, maintenance, and storage. For production volumes, ensure the contract specifies who is responsible for routine maintenance, refurbishment, and replacement of wear items. A common pitfall is not defining who owns the tooling at the end of the program, which can impact future sourcing flexibility.

How do prototype and production automotive machining processes differ in terms of lead time and cost per part?

Prototype machining typically involves more manual setup, fewer dedicated fixtures, and often uses general-purpose CNC machines. Lead times per iteration can be shorter initially, but the cost per part is higher due to less automation and setup optimization. Production machining, conversely, requires a much larger upfront investment in robust tooling, automated cells, and extensive validation (PPAP). While the initial lead time to launch is longer, the per-part cost drops dramatically at volume, and repeatability is maximized through optimized processes, tool wear monitoring, and automated inspection.

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