Knurling

Close-up shot of a diamond-pattern knurling on a cylindrical work piece. Knurling method: left/right with tips raised, spiral angle: 30°, pitch: 1 mm, profile angle: 90°

Knurling is a manufacturing process, typically conducted on a lathe, whereby a pattern of straight, angled or crossed lines is rolled into the material. Knurling can also refer to material that has a knurled pattern.[1]

  1. ^ "Knurls & Knurling" (PDF). Reed Machinery. p. 3. Retrieved 2017-07-30. Knurling is obtained by displacement of the material when the knurl is pressed against the surface of a rotating work blank.