Machinery's Handbook, 31st Edition
Milling Cutters
873
American National Standard Plain Milling Cutters ANSI/ASME B94.19-1997 (R2019)
Cutter Diameter
Hole Diameter
Range of Face Widths, Nom. a Light-duty Cutters b
Nom.
Max.
Min.
Nom.
Max.
Min.
16 ,
4 ,
16 ,
8 ,
3 ⁄
1 ⁄
5 ⁄
3 ⁄
2 ,
8 ,
4 , 1, 1
2 ,
2.515 2.485
1
1.00075 1.0000
1 ⁄
5 ⁄
3 ⁄
1 ⁄
2 1 ⁄
2
2 and 3
16 ,
4 ,
16 ,
8 ,
3 ⁄
1 ⁄
5 ⁄
3 ⁄
1
1.00075 1.0000
3
3.015 2.985
8 ,
4 , and 1
5 ⁄
3 ⁄
1 ⁄
2
2 ,
8 ,
4 ,
1 ⁄
5 ⁄
3 ⁄
1, 1
4 , 1
2 , 2
1.2510 1.2500
3
3.015 2.985
1 ⁄
1 ⁄
1 1 ⁄
4
and 3
4
4.015 3.985
1
1.00075 1.0000
4 , 8 ,
16 and
1 ⁄ 3 ⁄
5 ⁄ 1 ⁄
3 ⁄
8
2 , 1 ⁄
8 ,
4 ,
5 ⁄
3 ⁄
1, 1
2 , 2, 3
1.2510 1.2500
4
4.015 3.985
1 1 ⁄
4
and 4 Heavy-duty Cutters c
2.515 2.485 2.515 2.485 3.015 2.985 4.015 3.985 3.015 2.985 4.015 3.985
2 4
1 1 1
1.00075 1.0000 1.0010 1.0000 1.2510 1.2500 1.5010 1.5000
2 1 ⁄ 2 1 ⁄
2 2
3 4 3 4
2 , 3, 4 and 6
2, 2 1 ⁄
1 ⁄
4 2
2, 3, 4 and 6
1 1 ⁄
High-helix Cutters d
1.2510 1.2500
4 and 6
1 1 ⁄ 1 1 ⁄
4 2
8 1.5010 1.5000 a Tolerances on Face Widths: Up to 1 inch, inclusive, ± 0.001 inch; over 1 to 2 inches, inclusive,
+0.010, - 0.000 inch; over 2 inches, +0.020, - 0.000 inch. b Light-duty plain milling cutters with face widths under 3 ⁄
4 inch have straight teeth. Cutters with
3 ⁄ 4 - inch face and wider have helix angles of not less than 15 degrees nor greater than 25 degrees. c Heavy-duty plain milling cutters have a helix angle of not less than 25 degrees nor greater than 45 degrees. d High-helix plain milling cutters have a helix angle of not less than 45 degrees nor greater than 52 degrees. All dimensions are in inches. All cutters are high-speed steel. Plain milling cutters are of cylindrical shape, having teeth on the peripheral surface only. Hand of Cutter: Some types of cutters require special consideration when referring to their hand. These are principally cutters with unsymmetrical forms, face-type cutters, or cutters with threaded holes. Symmetrical cutters may be reversed on the arbor in the same axial position and rotated in the cutting direction without altering the contour produced on the work-piece, and may be considered as either right or left hand. Unsymmetrical cutters reverse the contour produced on the work-piece when reversed on the arbor in the same axial position and rotated in the cutting direction. A single-angle cutter is considered to be a right-hand cutter if it revolves counterclockwise, or a left-hand cutter if it revolves clockwise, when cutting as viewed from the side of the larger diameter. The hand of rotation of a single angle milling cutter need not necessarily be the same as its hand of cutter. A single corner rounding cutter is considered to be a right-hand cutter if it revolves counterclockwise, or a left-hand cutter if it revolves clockwise, when cutting as viewed from the side of the smaller diameter.
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