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Last updated: January 2026
This directory lists 60 lapping companies across the United States, from specialists in precision optics and semiconductor wafers to high-volume industrial lapping services for hydraulic components and mechanical seals.
Buyers typically engage these specialists to solve persistent challenges such as achieving ultra-precise flatness for sealing applications, refining surface finishes to minimize friction and wear, or preparing substrates for subsequent thin-film deposition with minimal subsurface damage. The goal is often to meet demanding PV/P-V (peak-to-valley) tolerances or attain specific Ra (roughness average) values that conventional grinding or milling cannot reliably produce, requiring precise material removal rates.
Supplier types in this space vary significantly. Some focus exclusively on contract double-sided lapping for high-volume parts, while others specialize in single-sided precision lapping for exotic materials or custom geometric forms. There are also niche providers who excel in optical flats or wafer thinning, often requiring cleanroom environments and advanced metrology. Distinguishing factors include their expertise with specific materials (e.g., ceramics, silicon, carbides), equipment size, and the precision levels they can consistently achieve for parallelism.
Buyers should approach these suppliers with thoroughly defined part drawings, including specific callouts for flatness, parallelism, surface finish (Ra, Rz), material specifications, and any required post-lapping processes like polishing or cleaning. Suppliers, in turn, expect a clear understanding of the application, desired quantities, and inspection criteria to accurately quote and advise on the most suitable lapping process, whether it's free-abrasive or fixed-abrasive, often leveraging carrier plates for optimal results.
60 companies nationwide
Based in San Jose, CA, A1J Technologies is a manufacturing partner offering end-to-end solutions. They provide capabilities such as 5-axis machining, ultra-precise wire EDM, laser micromachining, and lapping services. The company specializes in delivering high-quality precision manufacturing and processing solutions for diverse industrial clients.
Based in Rockford, IL, A-1 Lapping specializes in comprehensive lapping and fine grinding services. They offer single-sided and double-sided lapping, alongside high-production vertical spindle double disc grinding. The company is committed to providing excellent quality with rapid turnaround for its clients.
Advanced Ceramic Technology, based in Orange, CA, is an industrial ceramic manufacturer specializing in precision machining services. Since 1983, they have provided high-quality ceramic components, offering capabilities such as CNC ceramic machining, grinding, and ceramic lapping. They serve various industries with expertly machined parts.
Arrow Grinding, a family-owned company established in 1956, specializes in precision grinding services and close-tolerance part manufacturing. Certified with AS 9100 and ISO 9001, they deliver high-quality, accurate components. Their expertise in precision finishing makes them a provider for demanding industrial applications.
Based in Santa Barbara, CA, Atomica Corp. provides microfabrication services, including rapid prototyping and scalable production. They specialize in integrating complex layers and diverse materials, offering capabilities like wafer processing, bonding, and testing for applications in photonics, sensors, biotechnology, and MEMS.
Blue Ridge Optics specializes in precision optical fabrication, including double-sided lapping and polishing with planetary action. They offer high-speed and MRF polishing, CNC lens manufacturing, and custom thin film coatings. The company produces super-polished optics, optical assemblies, and custom laser optics solutions for global clients.
Based in Hudson, MA, Centerline Technology USA specializes in customizing the lapping process. The company provides precise flatness, parallelism, thickness identity, and specific surface finishes tailored to meet diverse customer requirements. They focus on delivering high-quality lapping solutions for various industrial applications.
World Wide Honing, Inc. is a California-based manufacturer specializing in precision Honing and Deep Hole Gun Drilling services. This company provides critical machining operations, which often complement or are found alongside lapping processes, serving industrial B2B customers.
Based in San Jose, CA, Grinding & Dicing Services Inc. specializes in critical wafer processing for IC test and packaging groups. They provide back grinding and polishing services, utilizing fully automated 300MM Disco machinery for precision and repeatability. The company handles small to medium-sized lot requirements, along with wafer dicing, pick & place, and inspection.
Grind Lap provides tight tolerance precision grinding, lapping, and honing services. They offer comprehensive finishing capabilities for diverse materials. Serving aerospace, automotive, medical, and military, Grind Lap simplifies supply chains as a single-source provider.
Hygrade Precision Technologies, based in Plainville, CT, specializes in precision grinding, lapping, and machining services. They offer single and double-sided lapping for parts up to 14 inches, alongside Blanchard grinding, CNC milling, and turning. The company focuses on quality and on-schedule delivery.
Based in Stamford, CT, KAF Manufacturing Company, Inc. is a precision machining company specializing in services such as lapping, grinding, diamond turning, and CNC milling. They provide superior flatness and tight tolerances for critical components, serving aerospace, medical equipment, and defense manufacturers.
Based in Northridge, CA, Maroney Company, LLC provides AS9100 and ISO 9001 certified ultra-precision machining services. Founded in 1955, they offer direct flat lapping and polishing solutions. Their capabilities include electrical discharge machining, grinding, and inspection for complex projects.
McCarter Machine provides precision machining, design, and fabrication services for specialty mechanical, semiconductor, and optical parts. They specialize in single crystal silicon components for commercial and government entities. The company utilizes proprietary methods for brittle materials, ensuring defect-free and stable components, including manufacturing obsolete parts from customer samples.
Based in Cedar Grove, NJ, Metal Cutting Corporation specializes in precision metal cutting, grinding, lapping, polishing, and machining services. With 50 years of experience, they manufacture burr-free, tight-tolerance parts for critical devices, serving medical, electronic, automotive, aerospace, and semiconductor industries.
Microlapping provides precision grinding and polishing for various materials, including steels, brass, and plastics. They recondition worn hydraulic rods, shafts, and cylinders for repair companies. Serving Fortune 500 and small job shops, Microlapping is ISO 9001:2015 certified, delivering high-quality results for any job size.
Based in Fremont, CA, Millennium Lapping Services provides high-quality lapping and polishing services for the machining industry. With 24 years of experience, the company specializes in precision surface finishing to meet diverse industrial needs.
Based in Morgan Hill, CA, Minimatics Inc. is a precision machine shop established in 1961. They specialize in manufacturing custom parts with extremely tight tolerances, utilizing CNC milling, turning, honing, lapping, and deburring capabilities. Minimatics serves the high-tech, aerospace, medical, and telecom industries with complex, small components.
Minnesota Grinding provides precision lapping and grinding services from its Delano, MN facility. They specialize in achieving perfect surface finishes and tight dimensional tolerances, including superior flatness and parallelism, for various industrial components. Their capabilities encompass double disc, surface, and custom lapping solutions for critical applications.
Based in Sunnyvale, CA, Nanosil LLC provides precision surface preparation services for semiconductor manufacturers. They specialize in polishing, back grinding, edge grinding, and cleaning solutions for silicon, silicon carbide, and quartz wafers, handling sizes up to 300mm.
Based in Leander, TX, One Source Manufacturing Technology specializes in tight tolerance manufacturing. They provide precision machining, metal finishing, and precision lapping services for materials from engineered polymers to exotic alloys. An ISO 9001 and AS9100 certified company, they serve the semiconductor, energy, and aerospace industries.
Polishing Corporation of America (PCA) provides comprehensive silicon and sapphire wafer manufacturing services. Based in Santa Clara, CA, the company specializes in wafer stripping, cleaning, reclaiming, thin films, and dicing. PCA utilizes class-10 clean rooms for advanced polishing processes in semiconductor applications.
Based in Melrose Park, IL, Precise Lapping & Grinding Corp. is an ISO 9001:2015 and AS9100D certified provider of precision lapping and grinding services. They offer comprehensive piece-part and production lapping, double-disc grinding, deburring, and diamond polishing for various metal alloys, plastics, ceramics, and composite materials.
Precision Ceramics, based in Palmetto, FL, specializes in custom technical ceramic solutions. The company offers a broad range of advanced ceramic materials and ultra-precise machining services to rapidly produce custom components. They support diverse industries, including aerospace, medical equipment, and semiconductor applications.
Based in Rochester, NY, Precision Optical manufactures precision optical components, thin film coatings, and assemblies. With over 65 years of experience, the company specializes in optical polishing, utilizing 34 continuous single-sided laps. These laps, ranging from 24” to 96”, accommodate demanding applications for large optical flats and custom prisms.
Based in Monrovia, CA, Production Lapping provides full-service lapping and contract manufacturing. Specializing in flat lapping, flat honing, CNC milling, turning, and assembly, the company has operated since 1961. They manufacture precision parts for aerospace, medical, semiconductor, undersea, and mechanical seal industries.
REM Surface Engineering, headquartered in Brenham, TX, specializes in advanced isotropic superfinishing technologies. Their patented REM® and ISF® Processes enhance metal component surfaces, significantly improving wear resistance, reducing friction, and extending fatigue life. They provide superior surface finish solutions for critical industrial applications.
Stellar Industries Corp, based in Millbury, MA, offers precision surface lapping services. Utilizing multiple surface lapping machines, the company specializes in achieving exacting thickness tolerance, superior surface finish, and precise flatness requirements for industrial applications. They are equipped to handle various component specifications, ensuring high-quality results.
Superior Technology, Inc., based in Rochester, NY, is an ISO 9001:2015 certified precision machine shop with over 50 years of experience. They provide close tolerance parts and assemblies, offering CNC turning, milling, grinding, lapping, and honing. Serving industries like Aerospace, Medical, and Defense.
Based in Elmira, NY, Swift Glass offers manual and computer-controlled surface lapping and polishing services, specializing in custom glass fabrication. They provide comprehensive manufacturing capabilities like CNC machining, edge grinding, and thermal tempering. Swift Glass processes diverse materials such as Borafloat® and Pyrex®, adhering to ISO 9001:2015, MIL-Specs, and ITAR standards.
Based in Rochester, NY, Sydor Optics specializes in custom manufacturing for flat optics, offering high-precision double-sided polishing services. They utilize North America's largest collection of state-of-the-art polishing machines to achieve nearly flawless surface flatness and parallelism. As an ISO 9001:2015 certified and ITAR registered supplier, they serve demanding industries including military and defense.
Based in Houston, TX, Texas Honing Inc. provides specialized precision machining and finishing services, including honing and polishing. With over 60 years of experience, they deliver high-quality, turnkey solutions from raw material to finished product. The company primarily serves drilling, completion, and production industries.
Based in Santa Ana, CA, T.Q. Abrasive Machining provides advanced technical ceramic machining services. This manufacturer designs and produces precision ceramic parts and components for industrial and commercial applications. They leverage ceramics' unique properties like hardness, low weight, and resistance to high temperatures and corrosion.
Based in Colorado Springs, CO, Tri-Gon provides close tolerance super finishing services for industrial components. Their capabilities include precision lapping, honing, and tumbling, achieving surface finishes from 1 to 32 microinches. The company serves B2B clients requiring high-precision surface treatments.
Trilap Precision Finishing, LLC. specializes in precision lapping and grinding services, achieving extremely tight tolerances for thickness, flatness, and parallelism. Based in Lowell, MA, the company offers fast turnaround for critical applications. It serves the aerospace, defense, medical, and industrial sectors, handling projects from prototype to full production.
United States Ball Corp. in La Mirada, CA, specializes in precision spherical grinding and lapping services. They expertly lap industrial metal balls, partial spheres, and spherical seats, achieving superior surface finishes and precise roundness. The company utilizes a wide range of materials and sizes to meet diverse industrial application needs.
Based in Shirley, MA, Valley Design provides high precision CNC machining, lapping, optical polishing, backgrinding, and dicing services. They specialize in processing technical ceramics, quartz, glass, sapphire, and metals. The company offers emergency flat lapping and polishing, often with same-day delivery, for critical industrial applications.
Based in Ventura, CA, Ventura Micro Tools specializes in precision grinding and lapping, alongside CNC machining and micro EDM. They manufacture small, complex custom machine components for the semiconductor, medical, defense, and aerospace industries. They possess expertise in machining ultra-hard materials.
Based in Manteca, CA, Aptek Industries Inc. provides high-quality wafer processing services. Capabilities include wafer backgrinding, grinding, polishing (CMP), and lapping. They also offer tape mount, laser services, edge grinding, backside metal deposition, and dicing, serving industrial customers with critical infrastructure needs.
Based in San Jose, CA, WaferPro is a prominent provider in silicon wafer manufacturing with over 10 years of experience. The company specializes in offering various wafer solutions, including advanced wafer polishing processes. They serve industrial and commercial clients needing high-quality silicon wafers for diverse, high-tech applications.
Based in San Jose, CA, Micro Surface Corporation, formerly Timesaver Products Company Inc., manufactures TimeSaver Lapping Compounds. Since 1919, they have provided high-quality compounds for lapping bearings, machine tools, and molds, serving military and automotive industries. They also offer WS2 dry film lubricant coatings.
Based in Worcester, MA, S.I. Howard Glass Co, Inc. specializes in custom glass fabrication, offering precision lapping and polishing to reduce thickness and improve surfaces of glass substrates. They provide CNC machining, scribing, and dicing for industries including military, electronics, medical, and aerospace, utilizing diverse glass materials.
Based in Worcester, MA, PremaTech Advanced Ceramics specializes in machining technical ceramics, offering precision lapping and polishing services. They achieve smoother surfaces on ceramic and hard materials for demanding applications. The company serves diverse industries including Semiconductor, LED, Optics, Medical Devices, Aerospace, Defense, and R&D.
Accumet Engineering Corporation, based in Devens, MA, specializes in precision laser machining, advanced ceramic processing, and lapping services. They leverage advanced technology and expertise to support complex projects for high-tech industries, including medical, aerospace, semiconductor, and defense, providing essential accuracy, speed, and quality.
Based in Sunnyvale, CA, Armstrong Technology is an experienced manufacturer of precision machined parts and assemblies. They specialize in expert lapping, grinding, and honing to achieve perfect finishes. Serving key sectors like aerospace, military, medical, and semiconductor equipment, the company maintains ISO 9001:2015 certification and class 1000 clean room capabilities.
Based in Houston, TX, B-W Grinding Service Inc. specializes in comprehensive precision grinding and finishing services. They offer extensive capabilities including Blanchard, rotary, surface, OD, ID, double disc, and jig grinding, plus honing. The company also provides precision lapping for superior flatness and finish on industrial components.
Based in Houston, TX, Don's Grinding & Lapping Service, Inc. is an ISO 9001:2015 certified provider of precision grinding and lapping services. They specialize in Blanchard, reciprocating, and diamond wheel surface grinding. Offering flat lapping for any material with machines up to 96 inches, the company also provides in-house HVOF coating.
Based in El Cajon, CA, High Precision Grinding & Machining specializes in comprehensive precision lapping, honing, polishing, and Blanchard grinding services. They deliver high-tolerance machining solutions, meeting rigorous demands for superior surface finishes and dimensional accuracy across various industrial applications.
IRD Glass provides precision fabrication services for custom glass, optics, ceramics, and sapphire products. They achieve arc-second quality parallelism and ultra-precise components for laser, medical, and automotive OEM markets, meeting strict specifications with advanced techniques.
Based in Chatsworth, CA, Kellar's Honing and Lapping offers precision machining and surface finishing solutions. Since 1959, they have specialized in expert flat lapping, honing, centerless grinding, and gundrilling services. The company provides superior surface finishes and precise dimensions to meet diverse manufacturing needs.
Based in York, SC, LapTech Industries provides complete precision grinding and finishing solutions. Specializing in high-speed and conventional flat lapping, fine grinding, honing, polishing, and deburring, they serve industries including automotive, electronics, appliance, and metal stamping. They emphasize precision results, low costs, and rapid turnaround for parts.
Optical Instrument Lab, Inc., based in Houston, TX, specializes in manufacturing quality fabricated glass parts. They provide complete engineering for industrial glass fabrication, including drilling, grinding, and polishing. Serving diverse sectors like Biomedical, Oil & Gas, Optical, and Aerospace, they work with materials such as PYREX®, Fused Silica, and sapphire.
Based in Redwood City, CA, Petersen Precision provides premium lapping and fine grinding services. This high-volume manufacturer delivers precision metal parts for complex designs and tight tolerances. With extensive in-house CNC machining, fine blank stamping, wire EDM, and abrasive finishing, they support diverse industries from prototype to volume production.
Based in Houston, TX, Seal Parts & Repair Company specializes in the repair and servicing of industrial seals. The company provides critical services for restoring mechanical seal performance, which includes precision lapping and surface finishing for optimal flatness and sealing integrity for various industrial applications.
Based in San Benito, TX, Sauceda's Precision Grinding, Inc. provides high-quality precision grinding services for industrial clients. Established in 1979, the company offers mass production capabilities, along with designing and building specialty process equipment, jigs, fixtures, and gages.
Based in Burbank, CA, Stevens Grinding Company provides precision grinding and cutting services. They specialize in flat lapping for ultra-flat, high-precision surfaces, alongside Blanchard grinding for large castings and double disc grinding for high-volume parts. The company also offers precision saw cutting.
Super Finishers, Inc. specializes in precision lapping, grinding, and superfinishing, working to millionths of an inch. With over 50 years of experience, they offer double disc, flat, and shoulder lapping services for extreme dimensional accuracy and micro finishes, delivering fully inspected parts with expedited turnaround.
Based in North Plains, OR, Align Precision provides precision manufacturing services including lapping, honing, and grinding. They achieve high Ra surface finishes for critical parts and assemblies. The company supports OEMs in aerospace, defense, semiconductor, and high-tech industries, working with hard metals, aluminums, alloys, and exotic materials.
Based in Elk Grove Village, IL, BTX Precision provides advanced precision manufacturing services. Their capabilities include grinding and lapping for high-tolerance components, delivering build-to-print solutions for mission-critical needs. They serve demanding industries such as aerospace, defense, medical, and semiconductor with deep engineering expertise.
Based in Houston, TX, Specialty Metal Finishing, Inc. provides specialized metal finishing services. The company offers precision surface treatments and enhancements for industrial components, improving their functionality and durability. They cater to various manufacturing sectors seeking high-quality finishing solutions.
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Lapping primarily uses free abrasives suspended in a slurry between the workpiece and a rotating lapping plate to achieve precise flatness, parallelism, and dimensional control, with a focus on consistent material removal and improving geometric accuracy. Polishing, often performed after lapping, uses finer abrasives, sometimes fixed in a pad, to refine the surface finish further, reducing Ra values, removing subsurface damage, and achieving a mirror-like appearance, but with less emphasis on bulk material removal or geometric correction.
Conditioning rings are critical for maintaining the flatness of the lapping plate itself. If the plate isn't consistently flat, it directly translates to variations in the flatness and parallelism of your parts. Carrier plates (or workholders) hold your individual parts during the lapping process, ensuring consistent pressure and uniform material removal across all surfaces, which is vital for achieving repeatable and tight tolerances across a batch. Inconsistent or poorly designed carrier plates are a major source of non-uniformity and can lead to unacceptable PV/P-V values.
Beyond standard dimensional reports, you should expect to receive detailed surface finish reports (e.g., Ra, Rz, Ry values from a profilometer), flatness reports (e.g., PV/P-V, TIR, or total flatness deviation from an interferometer or optical flat inspection), and parallelism reports where applicable. For critical applications, ask for surface integrity assessments to ensure minimal subsurface damage or micro-cracking, particularly on brittle materials. Crucially, ensure their inspection equipment is regularly calibrated to ISO 17025 standards, providing traceable data.