1. CN

Centerless Grinding Services (OD)

Centerless grinding is an OD grinding process. It differs from other cylindrical processes in that the workpiece is not mechanically constrained.


We can perform Centerless Grinding services for the large number of metal parts you may want grinded within a short period of time. Centerless Grinding is definitely the way to go if you have a large number of parts and components that need to be shaped and grinded. We offer high precision Thrufeed and Infeed centerless grinding for workpieces. With Thrufeed centerless grinding, we are able to work with workpieces with consistent roundness in the length of the workpiece. In Infeed centerless grinding, Jinyuan can grind cylindrical workpieces with complex shapes and or tapers to stringent tolerances.

Cylindrical Grinding Services (OD & ID)

Some components having complex geometries or featural relationships that cannot be grinded by the centerless grinding process, but we will use our precision cylindrical grinders to handle.


Jinyuan specializes in precision cylindrical grinding– that is, precision grinding inside diameters (IDs) and outside diameter (ODs) of cylindrical parts, excelling at those with multiple features, such as grooves, radii, and tapers. In some cases, form grinding may be utilized, where the component’s profile is formed directly into the grinding wheel.


Precision ID/OD grinding provides better part-to-part consistency over similar, alternative turning processes, especially for parts with size, roundness, concentricity, and surface finish requirements.

Surface Grinding Services

Jinyuan surface grinding team has the experience and knowledge to assess the ideal ways to perform surface grinding operations and tailor every process to the needs of each part.


We can accommodate large surface material. Dimensional tolerances to +/- 0.002mm can be accomplished. Surface grinding is ideal for material with a large surface and reducing cost by surface grinding multiple units at the same time. This can be achieved with stringent tolerances.


At Jinyuan, we welcome all types of surface grinding jobs, from simple or flat surface grinding to the most complex parts. We look forward to meeting and exceeding your expectations every time.

Double Disc Grinding

Double disc grinding is a highly efficient grinding method that reduces pre-machining costs up to 50% and provides dimensional tolerances to ±.0002″, parallelism to .0002″, flatness to .0002″, Additionally, double disc grinding provides surface finishes of up to 16 Ra on aluminum and up to 8 Ra on ferrous alloys.


Internal stress relief is another double disc grinding benefit. Simultaneously removing equal amounts of stock from two sides of a blank reduces residual stress. Less residual stress improves art stability during secondary operations and final machining.

Precision Grinding Capabilities
  1. External diameter tolerances as tight as +/-0.00008" (±0.002mm)
  2. Internal diameter tolerances as tight as +/- 0.00008" (±0.002mm)
  3. Roundness to +/- 0.00008" (±0.002mm)
  4. Cylindricity to +/- 0.00008" (±0.002mm)
  5. Grinding surface finishes 0.2Ra~0.8Ra
  6. Diameter from 0.5mm to 200mm
  7. Flatness to 0.00008”(0.002mm)