| Standard specification of DIN 82

DIN 82 Knurling is a standard established by Deutsches Institut Fur Normung E.V. (German National Standard) and was published on January 1, 1973.

There are two primary methods of knurling: cut knurling and form knurling. These methods serve distinct purposes and offer specific characteristics associated with their applications.

| Form knurling

The knurling process, whether it’s cut knurling or form knurling, leads to an increase in the external diameter of the workpiece. This process involves compressing the surface of the workpiece, which may not be suitable for thin materials.

When applying form knurling to workpieces with small diameters, there is a possibility of slight plastic deformation occurring on the end, as previously mentioned in the “Diamond Knurling Operation on CNC Lathe” section.

It is important to note that form knurling places a greater load on the CNC lathe due to the higher pressure involved. Consequently, a slower cutting speed and feed rate are typically required compared to cut knurling.

| Cut knurling

Benefits of using cut knurling for knurling operations include:

  • Achieves maximum precision and surface quality.
  • Suitable for knurling thin materials without causing deformation.
  • Saves time due to higher cutting speed and feed rate.
  • Compatible with a wide range of materials, including cast iron and plastic.
  • The cutting process places less load on the CNC lathe, ensuring its longevity.
  • Results in little to no change in the external diameter of the workpiece or minimal changes, preserving its original dimensions.

Case study: Cross Knurling Profile DIN 82-RGV