Centerless Grinding

  • Centerless Grinding-FIVES
  • Fives Grinding Ultra Precision Centerless 01-FIVES
  • Fives Grinding Ultra Precision Centerless dresser 02-FIVES
  • Fives Grinding Ultra Precision CNC 03-FIVES

Fives centerless grinders are field proven, backed by more than 90 years of engineering experience in designing and manufacturing production grinders and special grinding machines for a multitude of industries worldwide. The product range includes grinders able to grind from 1mm to 600 mm diameter and up to 12m in length in through feed or 660mm in-feed working method.


Centerless grinding is a machining process that uses abrasive cutting to remove material from a workpiece. Centerless grinding differs from centered grinding operations in that no spindle or fixture is used to locate and secure the workpiece, which is secured between two rotary grinding wheels, and the speed of their rotation relative to each other determines the rate at which material is removed from the workpiece.

Centerless grinding is typically used in preference to other grinding processes for operations where many parts must be processed in a short time.

There are two primary forms of centerless grinding, differentiated primarily by the method used to feed the workpiece through the machine.

Fives Grinding Ultra Precision through feed 2-FIVES

Through-feed

In through-feed centerless grinding, the workpiece is fed through the grinding wheels completely, entering on one side and exiting on the opposite. The regulating wheel in through-feed grinding is canted away from the plane of the grinding wheel in such a way as to provide a lateral force component, feeding the workpiece through between the two wheels. Through-feed grinding can be very efficient because it does not require a separate feed mechanism; however, it can only be used for parts with a simple cylindrical shape, like tubes, pistons, piston pins and bars.

Fives Grinding Ultra Precision in feed 1-FIVES

In-feed

In-feed centerless grinding is used to grind workpieces with relatively complex shapes, such as an gear shafts or cam shafts. Before the process begins, the workpiece is loaded into the grinding machine and the regulating wheel moved into place. The complexity of the part shapes and grinding wheel shapes required to grind them accurately prevent the workpiece from being fed axially through the machine.

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