Machinery's Handbook, 31st Edition
920
Reamers Hand Reamers—Straight and Helical Flutes ANSI/ASME B94.2-1995 (R2015)
D
B
C
A
D
B
C
A
Reamer Diameter
Length Overall A
Flute Length B
Square Length C
Size of Square 0.095 0.105 0.115 0.130 0.140 0.150 0.165 0.175 0.185 0.200 0.210 0.220 0.235 0.245 0.255 0.270 0.280 0.290 0.305 0.315 0.330 0.340 0.350 0.365 0.375 0.400 0.420 0.445 0.470 0.490 0.515 0.540 0.560 0.610 0.655 0.705 0.750 0.845 0.935 1.030 1.125
Straight Flutes
No. of Flutes
Helical Flutes
Decimal Equivalent 0.1250 0.1406 0.1562
… … … …
3
4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 4 to 6 6 to 8 6 to 8 6 to 8 6 to 8 6 to 8 6 to 8 6 to 8 6 to 8 6 to 8 6 to 8 6 to 8 6 to 8 6 to 8 6 to 8 6 to 8
1 1 ⁄ 2 1 5 ⁄ 8 1 5 ⁄ 8 1 3 ⁄ 4 1 3 ⁄ 4 1 7 ⁄ 8 1 7 ⁄ 8 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 2 2 5 ⁄ 8 2 5 ⁄ 8 2 3 ⁄ 4 2 3 ⁄ 4 2 7 ⁄ 8 2 7 ⁄ 8 3 1 ⁄ 8 3 1 ⁄ 4 3 3 ⁄ 8 3 1 ⁄ 2 3 3
1 ⁄ 8 9 ⁄ 64 5 ⁄ 32 11 ⁄ 16 3 ⁄ 16 13 ⁄ 64 7 ⁄ 32 15 ⁄ 64 1 ⁄ 4 17 ⁄ 64 9 ⁄ 32 19 ⁄ 64 5 ⁄ 16 21 ⁄ 64 11 ⁄ 32 23 ⁄ 64 3 ⁄ 8 25 ⁄ 64 13 ⁄ 32 27 ⁄ 64 7 ⁄ 16 29 ⁄ 64 15 ⁄ 32 31 ⁄ 64 1 ⁄ 2 17 ⁄ 32 9 ⁄ 16 19 ⁄ 32 5 ⁄ 8 21 ⁄ 32 11 ⁄ 16 23 ⁄ 32
5 ⁄ 32 5 ⁄ 32 7 ⁄ 32 7 ⁄ 32 7 ⁄ 32 1 ⁄ 4 1 ⁄ 4 1 ⁄ 4 1 ⁄ 4 1 ⁄ 4 1 ⁄ 4 5 ⁄ 16 5 ⁄ 16 5 ⁄ 16 5 ⁄ 16 3 ⁄ 8
3 1 ⁄ 4 3 1 ⁄ 4 3 1 ⁄ 2 3 1 ⁄ 2 3 3 ⁄ 4 3 3 ⁄ 4 4 1 ⁄ 4 4 1 ⁄ 4 4 1 ⁄ 2 4 1 ⁄ 2 4 3 ⁄ 4 4 3 ⁄ 4 4 4 5 1 ⁄ 4 5 1 ⁄ 4 5 1 ⁄ 2 5 1 ⁄ 2 5 3 ⁄ 4 5 3 ⁄ 4 6 1 ⁄ 4 6 1 ⁄ 2 6 3 ⁄ 4 7 3 ⁄ 8 7 3 ⁄ 4 8 1 ⁄ 8 8 3 ⁄ 8 5 5 6 6 7
0.1719 0.1875 0.2031 0.2188 0.2344 0.2500 0.2969 0.2812 0.2969 0.3125 0.3281 0.3438 0.3594 0.3750 0.3906 0.4062 0.4219 0.4375 0.4531 0.4688 0.4844 0.5000 0.5312 0.5625 0.5938 0.6250 0.6562 0.6875 0.7188 0.7500 0.8125 0.8750 0.9375 1.0000 1.1250 1.2500 1.3750 1.5000
… … … … 1 ⁄ 4 … … …
5 ⁄ 16 … … … 3 ⁄ 8 … … … 7 ⁄ 16 …
3 ⁄ 8 3 ⁄ 8 3 ⁄ 8 7 ⁄ 16 7 ⁄ 16 7 ⁄ 16 7 ⁄ 16 1 ⁄ 2 1 ⁄ 2 1 ⁄ 2 9 ⁄ 16 9 ⁄ 16 5 ⁄ 8 5 ⁄ 8 11 ⁄ 16 11 ⁄ 16 3 ⁄ 4 13 ⁄ 16 7 ⁄ 8
… …
1 ⁄ 2 … 9 ⁄ 16 … 5 ⁄ 8 … 11 ⁄ 16 … 3 ⁄ 4 7 ⁄ 8 13 ⁄ 16 15 ⁄ 16
3 11 ⁄ 16 3 7 ⁄ 8 4 1 ⁄ 16 4 3 ⁄ 16 4 9 ⁄ 16 4 7 ⁄ 8 5 1 ⁄ 8 5 7 ⁄ 16 5 13 ⁄ 16 6 1 ⁄ 8 6 5 ⁄ 16 6 1 ⁄ 2
6 to 8 8 to 10 8 to 10 8 to 10 8 to 10 8 to 10 8 to 12 10 to 12
3 ⁄ 4 … 7 ⁄ 8 …
9 1 ⁄ 8 9 3 ⁄ 4 10 1 ⁄ 4 10 7 ⁄ 8 11 5 ⁄ 8 12 1 ⁄ 4 12 5 ⁄ 8
1 5 ⁄ 16
1
1
1 1 1 1
1 1 ⁄ 8 1 1 ⁄ 4 1 3 ⁄ 8 1 1 ⁄ 2
1 1 ⁄ 8 1 1 ⁄ 4 1 3 ⁄ 8 1 1 ⁄ 2
13 10 to 14 All dimensions in inches. Material is high-speed steel. The nominal shank diameter D is the same as the reamer diameter. Helical-flute hand reamers with left-hand helical flutes are standard. Reamers are tapered slightly on the end to facilitate proper starting. Tolerances: On diameter of reamer, up to 1 ⁄ 4 -inch size, incl., + .0001 to + .0004 inch; over 1 ⁄ 4 - to 1-inch size, incl., +.0001 to + .0005 inch; over 1-inch size, +.0002 to +.0006 inch. On length overall A and flute length B , 1 ⁄ 8 - to 1-inch size, incl., ± 1 ⁄ 16 inch; 1 1 ⁄ 8 - to 1 1 ⁄ 2 -inch size, incl., ± 3 ⁄ 32 inch. On length of square C , 1 ⁄ 8 - to 1 inch size, incl., ± 1 ⁄ 32 inch; 1 1 ⁄ 8 -to 1 1 ⁄ 2 -inch size, incl., ± 1 ⁄ 16 inch. On shank diameter D , 1 ⁄ 8 - to 1-inch size, incl., - .001 to - .005 inch; 1 1 ⁄ 8 - to 1 1 ⁄ 2 -inch size, incl., - .0015 to - .006 inch. On size of square, 1 ⁄ 8 - to 1 ⁄ 2 -inch size, incl., - .004 inch; 17 ⁄ 32 - to 1-inch size, incl., - .006 inch; 1 1 ⁄ 8 - to 1 1 ⁄ 2 -inch size, incl., - .008 inch. 1 1 ⁄ 8
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