The Centerless Grinding throughfeed and plunge

Grinding of turned parts is a machining technique that consists of machining mechanical parts to improve their precision and/or surface finish.

Different types of grinding can be used depending on the characteristics and shape of the part to be ground.

SA Lefaillet performs all these types of grinding, and in particular centreless grinding, whether throughfeed or plunge.

Centerless throughfeed and plunge grinding

Centerless grinding is a cylindrical grinding process in which the workpiece is not held between centers, but is placed on a slide and rotated between two grinding wheels whose position remains fixed.

Centerless grinding is referred to as:

  • Throughfeed, when the workpiece moves axially between the two grinding wheels.

  • Plunging, when there is no axial movement.

Main materials used in centerless grinding

The main materials used in centerless grinding at Lefaillet are the following:

  • Rossi machines.
  • Traditional Ghiringhelli and CNC machines.
Possible dimensions and tolerances for centerless grinding

At Lefaillet, we can grind your precision turned parts with centerless grinding to the following tolerances:

  • ∅ 2 to ∅ 90.
  • Maximum length: 450 mm for threaded grinding (depending on the type of workpiece).


  • Dimensional 0.005.
  • Geometric 0.003.

For more information or a quote for your centerless throughfeed or plunge grinding needs, contact us!

High Precision Grinding

Our grinding services for precision turned parts and machining

Cylindrical internal grinding

Lefaillet takes care of the internal cylindrical grinding of your precision turned parts or precision machining parts.

External cylindrical grinding

Lefaillet can apply external cylindrical grinding between centers or in collets to your turned parts.

Centerless or plunge grinding

Lefaillet can process your turned parts with centerless throughfeed or plunge grinding.

Grinding and pairing of turned parts

Lefaillet can handle the grinding and pairing of your precision turned parts.

Other services for precision turned parts

Lefaillet can provide other services around the grinding of your precision turned parts.

Your precision turned parts can also go through combined grinding operations.

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