The tooth depth formed on the workpiece is approximately 42% of the Normal Circular Pitch.Ĩ0° FORM KNURLS : Pn (Normal Circular Pitch) for knurls listed by DP (Diametral Pitch). * Exceptions: All 14, 21, & 33 TPI wheels on all diagonal or diamond knurls.ĪPPROXIMATE TOOTH DEPTH OF ACCU-TRAK KNURLSĩ0° FORM KNURLS : Pn (Normal Circular Pitch) or P (Circular Pitch) are for knurls listed by TPI (Teeth Per Inch) and all Metric Pitch knurls. Diametral Pitch dies are designed to permit accurate tracking on standard fractional sized blanks up to 1-inch diameter in increments of 1/64”, 1/96”, 1/128”, & 1/160 inch, making blank diameter selection easier. There are only four standard pitches are used 64, 96, 128, & 160 DP. This system is fully explained in American Standard ANSI/ASME B94.6-1984. For diagonal and diamond wheels, the Metric Pitch is measured perpendicular to the teeth or helix angle. For knurls listed as a Metric Pitch, the pitch on straight knurls is the approximate tooth to tooth distance at the outside diameter of the work part measured in millimeters. The circular pitch measurement in inches, is derived from 1 inch divided by the number of Teeth per Inch with the exception of 14, 21, and 33 TPI. For diagonal knurl wheels, the *TPI is measured perpendicular to the teeth or helix angle. For straight knurl wheels the approximate TPI, may be measured on the outside diameter of the knurling for reference purposes. The TPI refers to the number of Teeth per (linear) Inch measured on the circumference of the work blank diameter. The CIRCULAR PITCH system has been used for many years and is based on the distance from tooth to tooth, and is measured as TPI (Teeth per Inch) or in the similar Metric Pitch and are expressed as the following: There are two basic methods of specifying tooth to tooth spacing, or PITCH: CIRCULAR PITCH and DIAMETRAL PITCH. Another method is “cut knurling” which uses special cut knurl holders, and cut type knurl wheels. It is usually produced by forcing a knurling die into the surface of a rotating part, displacing material from the original diameter. The word 'knurling' applies to both the method of production, and the rolled section on the part. Some of these include decorative and 'grip' surfaces, repair of undersized shafts and oversize bores, and driving serrations and splines. Knurling is widely used in industry for many applications.

Asme y14.5 knurl dimension