Machinery's Handbook, 31st Edition
Reamers
919
Expansion Chucking Reamers—Straight and Taper Shanks ANSI/ASME B94.2-1995 (R2015) D
B
A
Shank Dia., D
Shank Dia., D
Dia of Reamer
Length, A
Flute Length, B
Dia.of Reamer
Length, A
Flute Length, B
Max.
Min.
Max.
Min.
7 7 7 7 8 8 8 8 9 9 9 9
0.3105 0.3105 0.3730 0.3730 0.4355 0.4355 0.4355 0.4355 0.5620 0.5620 0.5620 0.5620 0.6245 0.6245 0.6245 0.6245 0.7495 0.7495 0.7495 0.7495 0.8745 0.8745 0.8745
0.3095 0.3095 0.3720 0.3720 0.4345 0.4345 0.4345 0.4345 0.5605 0.5605 0.5605 0.5605 0.6230 0.6230 0.6230 0.6230 0.7480 0.7480 0.7480 0.7480 0.8730 0.8730 0.8730
0.8745 0.8745 0.8745 0.9995 0.9995 0.9995 0.9995 0.9995 1.2495 1.2495 1.2495 1.2495 1.2495 1.2495 1.4995 1.4995 1.4995 1.4995
0.8730 0.8730 0.8730 0.9980 0.9980 0.9980 0.9980 0.9980 1.2480 1.2480 1.2480 1.2480 1.2480 1.2480 1.4980 1.4980 1.4980 1.4980
10 1 ⁄ 2
1 5 ⁄ 8 1 3 ⁄ 4 1 3 ⁄ 4 1 3 ⁄ 4 1 3 ⁄ 4 1 7 ⁄ 8 1 7 ⁄ 8
1 3 ⁄ 32
3 ⁄ 8
3 ⁄ 4 3 ⁄ 4 7 ⁄ 8 7 ⁄ 8
11 11 11 11
1 1 ⁄ 8
13 ⁄ 32
1 5 ⁄ 32 1 3 ⁄ 16 1 7 ⁄ 32
7 ⁄ 16
15 ⁄ 32
1 1
1 ⁄ 2
11 1 ⁄ 2 11 1 ⁄ 2
1 1 ⁄ 4
17 ⁄ 32
1 1 ⁄ 8 1 1 ⁄ 8 1 1 ⁄ 4 1 1 ⁄ 4 1 1 ⁄ 4 1 1 ⁄ 4 1 3 ⁄ 8 1 3 ⁄ 8 1 3 ⁄ 8 1 3 ⁄ 8 1 1 ⁄ 2 1 1 ⁄ 2 1 1 ⁄ 2 1 1 ⁄ 2 1 5 ⁄ 8 1 5 ⁄ 8 1 5 ⁄ 8
1 5 ⁄ 16
9 ⁄ 16
12 12
2 2
1 3 ⁄ 8
19 ⁄ 32
1 7 ⁄ 16
5 ⁄ 8
12 1 ⁄ 2 12 1 ⁄ 2
2 1 ⁄ 8 2 1 ⁄ 8 2 1 ⁄ 4 2 1 ⁄ 4 2 3 ⁄ 8 2 3 ⁄ 8 2 1 ⁄ 2 2 1 ⁄ 2 2 1 ⁄ 2 2 3 ⁄ 4 2 3 ⁄ 4
1 1 ⁄ 2
21 ⁄ 32 11 ⁄ 16 23 ⁄ 32
1 9 ⁄ 16 a
13 13
1 5 ⁄ 8
9 1 ⁄ 2 9 1 ⁄ 2 9 1 ⁄ 2 9 1 ⁄ 2
1 11 ⁄ 16 a
3 ⁄ 4
13 1 ⁄ 2 13 1 ⁄ 2
1 3 ⁄ 4
25 ⁄ 32 13 ⁄ 16 27 ⁄ 32
1 13 ⁄ 16 a
14 14 14
1 7 ⁄ 8
10 10 10 10
1 15 ⁄ 16 a
7 ⁄ 8
2
29 ⁄ 32 15 ⁄ 16 31 ⁄ 32
… … … … … … … …
14 1 ⁄ 2 14 1 ⁄ 2
2 1 ⁄ 8 b 2 1 ⁄ 4 b 2 3 ⁄ 8 b 2 1 ⁄ 2 b
1
15 15
3 3
10 1 ⁄ 2 10 1 ⁄ 2 10 1 ⁄ 2
1 1 ⁄ 32 1 1 ⁄ 16
… … … … …
a Straight shank only. b Taper shank only. All dimensions in inches. Material is high-speed steel. The number of flutes is as follows: 3 ⁄ 8 - to 15 ⁄ 32 -inch sizes, 4 to 6; 1 ⁄ 2 - to 31 ⁄ 32 -inch sizes, 6 to 8; 1- to 1 11 ⁄ 16 -inch sizes, 8 to 10; 1 3 ⁄ 4 - to 1 15 ⁄ 16 -inch sizes, 8 to 12; 2- to 2 1 ⁄ 4 -inch sizes, 10 to 12; 2 3 ⁄ 8 - and 2 1 ⁄ 2 -inch sizes, 10 to 14. The expansion feature of these reamers provides a means of adjustment that is important in reaming holes to close tolerances. When worn undersize, they may be expanded and reground to the original size. Tolerances: On reamer diameter, 3 ⁄ 8 - to 1-inch sizes, incl., +0.0001 to +0.0005 inch; over 1-inch size, + 0.0002 to + 0.0006 inch. On length A and flute length B , 3 ⁄ 8 - to 1-inch sizes, incl., ± 1 ⁄ 16 inch; 1 1 ⁄ 32 - to 2-inch sizes, incl., ± 3 ⁄ 32 inch; over 2-inch sizes, ± 1 ⁄ 8 inch. Taper is Morse taper: No. 1 for sizes 3 ⁄ 8 to 19 ⁄ 32 inch, incl.; No. 2 for sizes 5 ⁄ 8 to 29 ⁄ 32 incl.; No. 3 for sizes 15 ⁄ 16 to 1 7 ⁄ 32 , incl.; No. 4 for sizes 1 1 ⁄ 4 to 1 5 ⁄ 8 , incl.; and No. 5 for sizes 1 3 ⁄ 4 to 2 1 ⁄ 2 , incl. For amount of taper, see Table on page 1013 .
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