Knurling is a 8 letter English word. It's valid Scrabble word worth 13 points. It's valid Words with friends word worth 18 points.
You can make 119 anagrams from letters in knurling (giklnnru).
First recorded in 1605-15; knurl + -ing1
Concave knurls are sometimes used for knurling rounded edges on screw heads, etc.
Another machine puts the knurling around—forming the lubricating grooves, and another groove.
The two knurls are on opposite sides of the work so that the pressure of knurling is equalized.
It is actually a knurling process, you can see the knurling marks.