Knurling is a mechanical process that creates a rough textured pattern on a surface by pressing a textured tool against a rotating surface.
Knurling provides a way to create grips without additional components. Shapes are primarily cylindrical surfaces. Usually diamond or parallel line patterns and used.
A few examples of uses include tool handles, decorative stripes, grips for threaded adjusting devices and thumb screws. The process is usually done on ductile metals.
Cost reduction options are primarily reduction of the diameter and length of the knurled surface.
Knurling Design Considerations
- Avoid very hard materials.
- Specify the desired pattern - typically straight or diamond.
- Specify teeth per inch - typically 12 to 50 - preferably a range such as 28 - 32.
- Indicate the area to be knurled.
- If needed specify the dimensional tolerance of the knurled surface.
- Specify pitch.