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Gear Manufacturer Techniques

Gear Manufacturer Techniques

2026-02-02
Gears are the core transmission components of various mechanical equipment, and the processing accuracy of gears directly determines the operational stability and service life of the equipment. In the field of gear processing, the forming method and the involute generation method are the two main technical routes. Among them, the involute generation method, with its high processing accuracy and wide adaptability, has become the mainstream processing method.

Gear Rolling

Gear rolling is the most commonly used gear processing method in industrial production at present. Its core principle is to simulate the meshing process of intermeshing shafts with inclined gears. The gear rolling cutter is equivalent to a gear with a very small number of teeth and a very large helix angle. Through the rotation of the gear rolling cutter and the involute generation movement of the blank, combined with axial feed, the required tooth shape can be cut.

High production efficiency and ability to process straight and inclined cylindrical gears, as well as Worm Gear processing
Processing accuracy: medium-sized modulus gears reaching 7-8 grades, small modulus gears reaching 5-6 grades
Often used as rough or semi-finish processing step for gears

Gear Shaping

The processing principle of gear shaping is to simulate the meshing of parallel-axis cylindrical gears. The shaping cutter itself is a hardened gear, and through the reciprocating cutting motion and the involute generation movement with the blank, the tooth shape is processed. Its most significant feature is that it can process gear types that are difficult for gear rolling to reach.

Can process double-link gears, multi-link gears, internal gears, and reverse conical gears
High tooth shape accuracy with smaller surface roughness value
Lower production efficiency than gear rolling for large modulus gears

Gear Shaving

Shaving is an important finishing process before gear heat treatment. Its processing principle is to use the free meshing between the shaving cutter and the workpiece, through the relative sliding of the two, to remove the small residual material on the tooth surface of the workpiece. Shaving does not require complex cutting motions and has a relatively simple equipment structure.

Corrects tooth shape errors left after gear rolling or shaping
Surface roughness: Ra0.8~1.6μm, meeting medium-precision gear requirements
Can only process unquenched gears

Gear Grinding

Grinding is an important finishing process after gear heat treatment, specifically used for processing hard tooth surfaces of quenched gears. Its processing principle is similar to shaving, using a grinding wheel to freely mesh with the workpiece, through the abrasive cutting action of the grinding wheel, to correct the deformation of the gear after heat treatment.

High processing efficiency with costs much lower than grinding
Processing accuracy: 6-7 grades, surface roughness: Ra0.4~0.8μm
Often used in batch gear production in automobiles and tractors industries

Gear Grinding

Grinding is the most precise processing method in gear processing, also used for the fine processing of hard tooth surface gears after heat treatment. Its processing principle is to use a grinding wheel as a tool, through the involute generation movement to perform grinding processing on the gear tooth surface.

Highest processing accuracy: reaching 4-6 grades
Surface roughness: less than Ra0.4μm
Suitable for high-speed gears and precision Transmission Gears
Lower production efficiency with higher processing costs