Milling Cutters Milling Cutter Terms Milling Cutter Terms (Continued) Machinery's Handbook, 31st Edition
877
Radial Rake Angle (Positive Shown)
Tooth Face
Radial Relief
Tooth Flute Fillet Offset
Axial Relief
Peripheral Cutting Edge
Clearance Surface Radial Relief Angle Land
Tooth Face Axial Relie f Angle
Tooth Face Clearance Surface
Heel Flute
Radial Rake Angle (Positive Shown)
Tooth
Offset
Concavity
Fillet
Lip
Lip Angle
American National Standard Single- and Double-Angle Milling Cutters ANSI/ASME B94.19-1997 (R2019) Cutter Diameter Nominal Face Width a Hole Diameter Nom. Max. Min. Nom. Max. Min. Single-Angle Cutters b c 1 1 ⁄ 4 1.265 1.235 7 ⁄ 16
3 ⁄ 8 -24 UNF-2B RH 3 ⁄ 8 -24 UNF-2B LH 1 ⁄ 2 -20 UNF-2B RH
1.640 2.765 3.015
1.610 2.735 2.985
c 1 5 ⁄ 8
9 ⁄ 16
1
1.00075 1.2510
1.0000 1.2500
2 3 ⁄ 4
1 ⁄ 2 1 ⁄ 2
3
1 1 ⁄ 4
Double-Angle Cutters d
2.765
2.735
1
1.00075
1.0000
2 3 ⁄ 4
1 ⁄ 2
a Face width tolerances are plus or minus 0.015 inch. b Single-angle milling cutters have peripheral teeth, one cutting edge of which lies in a conical surface and the other in the plane perpendicular to the cutter axis. There are two types: one has a plain keywayed hole and has an included tooth angle of either 45 or 60 degrees ± 10 minutes; the other has a threaded hole and an included tooth angle of 60 degrees ± 10 minutes. Cutters with a right-hand threaded hole have a right-hand hand of rotation and a right-hand hand of cutter. Cutters with a left-hand threaded hole have a left-hand hand of rotation and a left-hand hand of cutter. Cutters with plain keywayed holes are standard as either right-hand or left-hand cutters. c These cutters have threaded holes, the sizes of which are given under “Hole Diameter.” d Double-angle milling cutters have symmetrical peripheral teeth, both sides of which lie in conical surfaces. They are designated by the included angle, which may be 45, 60 or 90 degrees. Tolerances are ± 10 minutes for the half angle on each side of the center. All dimensions are in inches. All cutters are high-speed steel.
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