Precision Grinding Services

Precision grinding services perform operations such as centerless grinding, creep feed grinding, double-disc grinding, internal grinding, external grinding, jig grinding, surface grinding, and thread grinding. Centerless grinding is a machining operation in which an abrasive wheel grinds metal from a bar’s surface while a regulating wheel forces the bar against the grinding wheel. Creep feed grinding is a type of plunge grinding that uses specialized grinding equipment. The grinding wheel is fed into the work at very slow infeed rates. Disc grinding and double disc-grinding use a large wheel to produce flat, parallel parts for high-volume production. Internal grinding or ID grinding is used to grind the inner diameter (ID) of holes. By contrast, external grinding or OD grinding is used to grind the outer diameter (OD) of cylindrical parts. Jig grinding uses very precise machines for locating and generating very accurate holes, contours, and surfaces to tolerances of .0001" or less. Surface grinding mounts the workpiece a table for back and forth feeding under the grinding wheel. Thread grinding is used to produce lead screws, ball screws, and worms. Precision grinding services that perform other types of grinding operations are also available.

Precision grinding services differ in terms of additional services and material capabilities. There are five parameters for additional services: CAD/CAM support, design assistance, just-in-time (JIT) delivery, rapid prototyping, low-volume production, and high-volume production. Computer aided design or drafting (CAD) is used to design parts quickly and accurately. Computer aided manufacturing (CAM) is used to fabricate products directly from CAD outputs. JIT manufacturing is designed to reduce inventory maintenance. With regard to material capabilities, precision grinding services often work with metals such as aluminum, brass, bronze, cast iron, copper, hardened metals, nickel, nickel alloys, precious metals, steel, stainless steel, steel alloys, and titanium. Precision grinding services may also work with non-metal materials such as carbides, ceramics, composites, natural and synthetic diamond, glass, glass ceramics, quartz, sapphire, and ruby.   

Precision grinding services are located across the United States and around the world. They adhere to a variety of certifications, regulatory requirements, and quality standards. Precision grinding services follow four main specifications from the International Standards Organization (ISO): ISO 9001:2000, ISO 13485:2003, ISO 14001, and ISO/TS 16949:2002. AS 9000, AS 9100, and QS-9000 are industry-specific quality standards that are based on ISO 9001. Both AS 9000 and AS 9001 define quality management system (QMS) requirements for suppliers to the aerospace industry. QS-9000 is a quality standard for suppliers of DaimlerChrysler Corporation, Ford Motor Company, and General Motors Corporation. Some precision grinding services are registered with the Food and Drug Administration (FDA), or comply with U.S. military specifications (MIL-SPEC). Others meet internal company specifications or requirements from original equipment manufacturers (OEM).

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