General Knurling Information

SPEEDS AND FEEDS

Knurling is normally done at the same speed as cutting operations.  Bump knurling from the cross-slide should be done in 10 to 20 revolutions.  (Over rolling will cause flaking and poor knurl life).  Knurls from the turret should be fed onto the work
at about  .005 to  .020 per rev. (slower for harder materials faster for soft materials) and off the work about twice as fast.   For turret knurling, a faster, feed rate may correct a tracking problem, as this  would make a larger impression on the first revolution, thus increasing the chance of the teeth falling in place on the second revolution even though the spacing  were off slightly.

Note:  bevels are recommended when traverse knurling.
Bevels  will be provided at no extra charge when requested, but beveled knurls may not be returned if ordered in error.

TRACKING (AND MIS-TRACKING)

When a single knurl makes its first revolution and then falls back into the first tooth that it rolled, it is tracking correctly.  If the circumference of the part being rolled is not an approximate multiple of the pitch of the knurl, the knurl may land somewhere between the two initial teeth, causing it to start a
new row.  This may cause double tracking (or any multiple of the initial pitch).  This problem can usually be corrected by changing the diameter of the work by +/-  .005" to .010".   Otherwise, order a special knurl.