Machinery's Handbook, 31st Edition
1058 Knurls and Knurling Flat Knurling Tools.— The flat type of tool is a knurling die, commonly used in recipro cating types of rolling machines. Dies may be made with either single or duplex faces having either straight or diagonal teeth. No preferred sizes are established for flat dies. Flat Knurling Die with Straight Teeth:
Linear Pitch = P l Radius at Root = R
Tooth Depth = h
R = radius at root
(8) (9) (10)
h = tooth depth Q = tracking correction factor (see Table 2) P l = linear pitch on die P = diametral pitch = N w ÷ D w D w = work blank (pitch) diameter = N w ÷ P N w = number of teeth on work = P × D w = circular pitch on work pitch diameter = P − Q
(11)
Table 3. ANSI Standard Specifications for Flat Knurling Dies ANSI/ASME B94.6-1984 (R2014)
Tooth Depth, h
Tooth Depth, h
Radius at Root, R
Radius at Root, R
Diametral Pitch, P
Linear Pitch, a P l
Diametral Pitch, P
Linear Pitch, a P l
Straight Diagonal
Straight Diagonal
64
0.0484 0.024 0.021 0.0070 0.0050
128
0.0244 0.012 0.010 0.0045 0.0030
96 0.0195 0.009 0.008 0.0040 0.0025 a The linear pitches are theoretical. The exact linear pitch produced by a flat knurling die may vary slightly from those shown, depending upon the rolling condition and the material being rolled. All dimensions except diametral pitch are in inches. 0.0325 0.016 0.014 0.0060 0.0040 160
Addendum = a
Tooth Depth = h
Work Blank Diameter = D w
Knurled Diameter = D ow
Teeth on Knurled Work Formulas Applicable to Knurled Work.— The following formulas are applicable to knurled work with straight, diagonal, and diamond knurling.
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