Standard specification of DIN 82
DIN 82 Knurling, standard by Deutsches Institut Fur Normung E.V. (German National Standard), published on Jan. 01, 1973.
There are generally two different types of knurling process: cut knurling and form knurling. Each of these processes has its own particular areas of application with correlated properties:
|RAA 0º||RBL 45º||RBL 30º||RBR 45º||RBR 30º|
|knurl with axially parallel grooves||left-hand knurl, spiral angle 30 degrees||left-hand knurl, spiral angle 45 degrees||right-hand knurl, spiral angle 30 degrees||right-hand knurl, spiral angle 45 degrees|
|RGE 30º||RGE 45º||RGV 30º||RGV 45º||RKE||RKV|
|left-right knurl, spiral angle 30 degrees, points raised||left-right-hand knurl, spiral angle 30 degrees, left-right-hand knurl, points raised||left-right-hand knurl, points indented||left-right-hand knurl, points indented, 45 degrees||cross-hatched knurl, points raised, 90 degrees||cross-hatched knurl, points indented, 90 degrees|
• The external diameter of the workpiece will be increased.
• It will compress the surface of the workpiece.
• Not recommended for thin materials.
• Form knurling on workpieces with a small diameter is possible to result in slightly plastic deformation on its end, as mentioned previously in "Diamond Knurling Operation on CNC Lathe".
• The CNC lathe is subjected to a greater load due to the higher pressure.
• Slower cutting speed and feed rate, compared to cutting knurling.
• Maximum precision and surface quality
• Can be used for knurling thin materials without deformation
• Saves time on account of higher cutting speed and feed rate
• Compatible with virtually any material, including cast iron and plastic
• Cutting process with less loading protects the top end CNC lathe.
• No or minimal changes to the external workpiece diameter.