Top Grinding Services Suppliers in the U.S.

Precision ground surfaces are everywhere in modern manufacturing, even when they are invisible to the end user. The bearing that keeps a turbine spinning at spec, the roll that gives sheet metal its finish, the carbide tool that holds its edge through thousands of cuts: all of them depend on grinding to achieve the tolerances and surface qualities that make them functional. Industrial grinding services occupy a foundational role in manufacturing, providing the precision finishing work that separates a rough machined part from one that meets exacting dimensional and surface requirements.

The U.S. grinding services industry is a mature, highly specialized sector dominated by small job shops with deep technical expertise and long operating histories. This article examines the current state of the industry using data collected directly from U.S. grinding suppliers, explores the key trends shaping the sector in 2026, and highlights the largest companies and top suppliers serving manufacturers across the country.

Key Facts on U.S. Grinding Services Suppliers

MNI, compiler and publisher of industrial business profiles for the U.S. industrial sector and the informational engine behind IndustryNet, directly collects key data points on this essential industry. The following are key findings drawn from MNI's direct, company-by-company verification of U.S. grinding services suppliers.

• There are currently 440+ grinding services suppliers operating in the United States.
• Those companies collectively employ more than 7,200 workers nationwide.
• Total average reported sales among U.S. grinding suppliers stand at approximately $735 million.
• Nearly 13% of suppliers distribute their products or services internationally.
• Roughly 6% of suppliers import raw materials from outside the United States.
• The average grinding supplier operates out of approximately 23,700 square feet of facility space.
• The average U.S. grinding company has been in business for 48 years, with a median founding year of 1979, making it the most seasoned sector in this series and a reflection of the deep craft expertise the work demands.
• 17.8% of grinding suppliers hold ISO or related quality certifications, consistent with the precision-driven nature of the work and the demanding end markets these shops serve.
• Women-owned businesses represent 2.2% of the sector; minority-owned businesses account for 0.7% and veteran-owned businesses for 1.0%.
• The Midwest leads the industry geographically, accounting for nearly 50% of all suppliers. The West follows at 22%, the Northeast at 18%, and the South at 11%. California leads all states with 66 suppliers, followed by Illinois (56), Michigan (47), Ohio (47), and Pennsylvania (24).

What Grinding Services Suppliers Do

Industrial grinding is a precision machining process that uses abrasive wheels, belts, or media to remove material from a workpiece, bringing it to a specified dimension, geometry, or surface finish. Unlike rough machining operations that remove large amounts of material quickly, grinding is typically applied at the final stages of production, where tolerances are tightest and surface quality matters most.

The industry encompasses a wide range of grinding technologies, each suited to different part geometries, materials, and applications. Surface grinding produces flat, smooth surfaces on metal workpieces using a rotating abrasive wheel. Centerless grinding removes material from the outside diameter of cylindrical parts without requiring a center hole, making it well suited for high-volume production of shafts, pins, and rods. Cylindrical grinding, both OD and ID, shapes the outer or inner diameter of round parts to precise specifications. Blanchard grinding, also known as rotary surface grinding, is used to rapidly remove stock from large flat surfaces. Creep feed grinding handles complex profiles and hard materials in a single slow pass. Honing and lapping provide ultra-fine surface finishes for applications such as engine cylinders, hydraulic components, and precision gauges.

Core capabilities across grinding shops typically include a mix of these process types, often complemented by CNC machining, inspection, and heat treating. Many shops specialize narrowly in one or two grinding methods and build deep expertise in specific materials or industries, while others offer broader service menus for customers seeking a single source for multiple finishing operations.

The industries served span virtually all of advanced manufacturing: aerospace and defense, automotive, medical devices, energy, tooling and die, heavy equipment, electronics, and general industrial manufacturing all depend on precision grinding to achieve the part quality their applications require.

Largest Grinding Services Companies in the U.S.

About the Largest Grinding Services Companies in the U.S.

The following companies represent the largest grinding services suppliers in the United States by workforce size. Their scale reflects sustained investment in precision equipment, process expertise, and the long-term customer relationships that define this sector.

Magotteaux Pulaski, Inc.
Pulaski, TN | 301 Employees

Founded in 1973, Magotteaux Pulaski operates from a 190,000-square-foot facility and produces steel grinding balls, liner plates, and alloy castings for international customers. As part of a global grinding media group, the company serves the mining, cement, and mineral processing industries with wear-resistant products that are consumed in high-volume grinding applications around the world.

Abrasive-Form, Inc.
Bloomingdale, IL | 200 Employees

Established in 1976, Abrasive-Form operates from a 62,000-square-foot facility and specializes in creep feed grinding of land-based and aircraft turbine blades, vanes, and shrouds. Holding both ISO 9001:2008 and AS9100:2009C certifications and reporting annual sales of $25 million, the company is one of the more significant precision grinding operations in the aerospace supply chain.

Pavement Recycling Systems, Inc.
Jurupa Valley, CA | 185 Employees

Founded in 1989, Pavement Recycling Systems provides grinding job shop services alongside soil stabilization work, operating primarily in the regional infrastructure and pavement rehabilitation market. The company occupies a distinct niche within the broader grinding sector, applying grinding technology to road and site preparation applications rather than precision part manufacturing.

Boston Centerless, Inc.
Woburn, MA | 130 Employees

Established in 1958, Boston Centerless operates from a 76,000-square-foot facility and combines precision ground bar material supply with centerless grinding services for international customers. Holding AS9100 certification and operating under brand names including AccuRod, GrindAll, and PinGage, the company serves aerospace, medical, and industrial customers that require tight-tolerance bar stock and ground components.

Precision Grinding & Manufacturing Corp.
Rochester, NY | 123 Employees

Founded in 1967, Precision Grinding & Manufacturing operates from a 77,000-square-foot facility and provides precision grinding alongside CNC machining and assembly services. Holding AS9100 certification and reporting annual sales of $25 million, the company serves national customers with a full-service approach that takes parts from raw stock through finished, inspection-ready components.

Aggressive Grinding Service, Inc.
Latrobe, PA | 100 Employees

Established in 1988, Aggressive Grinding Service specializes in carbide grinding from its 12,500-square-foot facility, serving national customers that require precision finishing of one of manufacturing's most demanding materials. The company's focused specialization in carbide reflects the level of process expertise the material requires and the high value of the parts it typically supports.

AgriCycle, Inc.
Valley Park, MO | 100 Employees

Founded in 1994, AgriCycle operates from a one-million-square-foot site and provides wood waste and stump grinding alongside land clearing, forestry mowing, and storm debris cleanup services. The company applies industrial grinding technology to environmental and land management applications, serving a market that sits at the intersection of agriculture, landscaping, and infrastructure maintenance.

KMM Group, Ltd.
Hatboro, PA | 100 Employees

Established in 1957, KMM Group operates from a 42,000-square-foot facility and runs a precision grinding job shop serving international customers across a range of demanding industries. Holding ISO 13485, ISO 9001, and AS9100 certifications simultaneously, the company is among the most broadly certified grinding shops in the country, positioning it to serve medical, aerospace, and industrial customers with stringent quality system requirements.

Precision Roll Grinders, Inc.
Allentown, PA | 100 Employees

Founded in 1970, Precision Roll Grinders operates from a 100,000-square-foot facility and focuses on metal roll and cylinder grinding alongside CNC machine shop services, distributing internationally under the Roll Armor Coatings brand. The company serves industries such as steel, paper, printing, and converting, where precision ground rolls are essential to product quality and line performance.

Premier Casting Services, Inc.
Waterloo, IA | 100 Employees

Founded in 1994, Premier Casting Services operates as an iron casting grinding job shop, providing finishing services for cast components used in industrial and commercial applications. The company serves a local market with a focused service offering built around the specific grinding requirements of iron castings.

IndustryNet's Top Grinding Services Suppliers

Beyond the largest operations, a strong network of specialized grinding shops serves manufacturers with process-specific expertise, fast turnaround, and the kind of close customer collaboration that precision work demands. Many of these suppliers have built decades of experience in a specific grinding method or end market, giving them capabilities that generalist machine shops cannot easily replicate.

Grind Lap Services, Inc. (Addison, IL): Grind Lap Services provides precision grinding, lapping, and honing services for customers across nearly every manufacturing industry, offering a broad range of finishing processes from a single source.

Minnesota Grinding, Inc. (Minneapolis, MN): In business since 1959, Minnesota Grinding brings more than six decades of precision grinding experience to customers in the Upper Midwest, with a long track record of serving industrial and commercial manufacturers.

R&S Grinding (Little Canada, MN): R&S Grinding specializes in precision and production grinding, serving manufacturers that need both custom one-off work and consistent, repeatable output at production volumes.

Aarstar Precision Grinding, Inc. (Franklin Park, IL): With more than 66 years in business, Aarstar Precision Grinding is one of the longer-established shops in the Chicago-area manufacturing corridor, bringing deep process experience to precision grinding applications.

All Around Precision Grinding, L.L.C. (Blaine, MN): All Around Precision Grinding operates as a metal grinding job shop with capabilities including Blanchard, centerless, and CNC OD grinding, covering a range of part geometries and production requirements.

Chicago Grinding & Machine Co. (Melrose Park, IL): Chicago Grinding & Machine offers Blanchard, Mattison surface, and stainless steel grinding alongside CNC flame cutting, straightening, welding, general machining, duplex milling, CNC planer milling, in-house vibratory stress relieving, and steel distribution, making it one of the more broadly capable shops in the Midwest.

Midwest Grinding Co., Inc. (Milwaukee, WI): Midwest Grinding Co. specializes in flat grinding, serving industrial customers in the Great Lakes region with focused expertise in surface finishing of flat workpieces.

International Knife & Saw, Inc. (Florence, SC): International Knife & Saw manufactures industrial knives and saws for the tissue, paper, metal, printing, and recycling industries, and supports customers with contract manufacturing, grinding, and heat treating services.

RPM Centerless Grinding Co. (Norco, CA): RPM Centerless Grinding specializes in centerless thru-feed grinding, serving manufacturers that require consistent, high-throughput finishing of cylindrical parts.

Accurate Double Disc Grinding (Pacoima, CA): Accurate Double Disc Grinding provides metal grinding services with a focus on double disc grinding, a process well suited to achieving precise parallel flat surfaces on high volumes of parts simultaneously.

Ace Grinding Inc. (Melrose Park, IL): Ace Grinding holds ISO 9001:2015 certification and specializes in custom centerless grinding, serving customers that require both process consistency and a documented quality system.

Arkansas Tool & Die, Inc. (North Little Rock, AR): Arkansas Tool & Die operates as a full-service tooling and CNC production job shop, offering metal stamping dies, aluminum die cast molds, plastic injection molds, special machines, and grinding services under one roof.

Midwest Knife Grinding, Inc. (Canal Fulton, OH): Midwest Knife Grinding produces new machine knives and provides quick resharpening services, supporting manufacturers in the paper, plastics, food processing, and converting industries that depend on sharp, precisely ground cutting edges.

Tru-Grind, Inc. (Arlington Heights, IL): Tru-Grind specializes in precision and production grinding and honing, serving manufacturers across a range of industries that require high-accuracy surface finishing from a reliable regional partner.

See all 443 U.S. grinding services suppliers on IndustryNet.

Key Trends in Grinding Services in 2026

1. Aerospace and Defense Demand Keeping Precision Shops Busy

Continued investment in commercial aircraft production, defense programs, and space applications is driving sustained demand for precision grinding services, particularly in turbine components, structural parts, and high-performance tooling. Shops holding AS9100 certification and experienced with nickel superalloys, titanium, and advanced composites are finding aerospace customers among their most consistent sources of work. The complexity of aerospace part geometries and the tightness of tolerance requirements make grinding an irreplaceable step in the supply chain for this sector.

2. Medical Device Manufacturing Raising the Precision Bar

Growth in orthopedic implants, surgical instruments, minimally invasive device components, and drug delivery hardware is expanding demand for grinding services capable of holding extremely tight tolerances in difficult materials including stainless steel, cobalt chrome, and titanium. Medical customers typically require ISO 13485 quality systems, full material and process traceability, and surface finish documentation that many general-purpose grinding shops are not equipped to provide. Shops that have invested in medical-grade quality systems are well positioned as this segment continues to grow.

3. Skilled Workforce Shortages Constraining Capacity

Precision grinding is a craft-intensive trade that requires years of experience to master, and the aging of the skilled grinding workforce is one of the most pressing operational concerns facing shops across the country. The industry's median founding year of 1979 reflects a sector where institutional knowledge runs deep, and the challenge of transferring that knowledge to the next generation of operators is real. Shops investing in apprenticeship programs, CNC-assisted grinding equipment that reduces reliance on manual skill, and structured training pipelines are better positioned to maintain capacity as experienced workers retire.

4. CNC and Automation Expanding What Shops Can Hold

Advanced CNC grinding machines with in-process gauging, automatic wheel dressing, and adaptive control are enabling shops to hold tighter tolerances more consistently and with less dependence on operator intervention. Automation in part loading, inspection, and data collection is improving throughput and reducing scrap rates. These investments are particularly valuable for shops serving aerospace and medical customers, where process documentation and repeatability are as important as the final part dimension.

5. Hard and Exotic Materials Growing as a Specialty

Demand for grinding services on hardened steels, carbide, ceramic, and advanced alloys continues to grow as manufacturers push for higher performance in cutting tools, wear components, and structural parts. Grinding is often the only practical method for finishing these materials to the required tolerances and surface finishes. Shops with specialized equipment and experience in hard and exotic materials command premium pricing and face less price competition than generalist operations working with more common materials.

6. Consolidation Creating Both Opportunity and Pressure

The grinding services industry is fragmented, with a large number of small, owner-operated shops serving regional markets. Consolidation activity, as private equity-backed platforms and larger machining groups acquire specialty grinding shops, is beginning to reshape parts of the market. For independent shops, this creates both competitive pressure from better-capitalized operators and potential exit opportunities for owners approaching retirement. The trend is likely to continue as the industry's aging ownership profile intersects with growing outside interest in precision manufacturing businesses.

7. Surface Integrity Requirements Tightening Across Industries

Beyond dimensional tolerance, customers in aerospace, medical, and high-performance industrial applications are increasingly specifying surface integrity requirements that go beyond roughness measurements to include residual stress, microstructure, and subsurface damage. Meeting these requirements demands not only precision equipment but a deep understanding of how grinding process parameters affect the material being finished. Shops that can demonstrate surface integrity capability and provide process documentation are differentiating themselves from competitors offering basic grinding services.

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About This Data

MNI collects detailed information firsthand, making direct contact with each industrial company in the U.S. to verify multiple data points about their business. This data powers IndustryNet, an industrial sourcing platform connecting buyers with suppliers across thousands of product categories, and IndustrySelect, which offers real-time access to detailed company and executive profiles for sales, marketing, recruiting, and research.