Machinery's Handbook, 31st Edition
924
Reamers Straight-Shank Chucking Reamers—Straight Flutes, Letter Sizes ANSI/ASME B94.2-1995 (R2015)
D
B
A
Shank Dia. D
Shank Dia. D
Lgth. of Flute B
Lgth. of Flute B
Lgth. Over all A
No. of Flutes
Lgth. Over all A
No. of Flutes
Reamer Diameter
Reamer Diameter
Letter
Inch
Max.
Min.
Letter
Inch
Max.
Min.
6 1 1 ⁄ 2 0.2265 .2255 4 to 6
N
0.3020
6 6 6 6 6 7 7 7 7 7 7 7 7
0.2792 0.2782 4 to 6 0.2792 0.2782 4 to 6 0.2792 0.2782 4 to 6 0.2792 0.2782 4 to 6 0.2792 0.2782 4 to 6 0.3105 0.3095 4 to 6 0.3105 0.3095 4 to 6 0.3105 0.3095 4 to 6 0.3105 0.3095 4 to 6 0.3105 0.3095 4 to 6 0.3105 0.3095 4 to 6 0.3105 0.3095 4 to 6 0.3730 0.3720 6 to 8
A 0.2340 B 0.2380 C 0.2420 E 0.2500 F 0.2570 G 0.2610 H 0.2660 D 0.2460
1 1 ⁄ 2 1 1 ⁄ 2 1 1 ⁄ 2 1 1 ⁄ 2 1 1 ⁄ 2 1 3 ⁄ 4 1 3 ⁄ 4 1 3 ⁄ 4 1 3 ⁄ 4 1 3 ⁄ 4 1 3 ⁄ 4 1 3 ⁄ 4 1 3 ⁄ 4
6 1 1 ⁄ 2 0.2329 .2319 4 to 6 O 0.3160
6 1 1 ⁄ 2 0.2329 .2319 4 to 6 6 1 1 ⁄ 2 0.2329 .2319 4 to 6 6 1 1 ⁄ 2 0.2405 .2395 4 to 6 6 1 1 ⁄ 2 0.2485 .2475 4 to 6 6 1 1 ⁄ 2 0.2485 .2475 4 to 6 6 1 1 ⁄ 2 0.2485 .2475 4 to 6 6 1 1 ⁄ 2 0.2485 .2475 4 to 6 6 1 1 ⁄ 2 0.2792 .2782 4 to 6 6 1 1 ⁄ 2 0.2792 .2782 4 to 6
P Q R S T
0.3230 0.3320 0.3390 0.3480 0.3580 0.3770 0.3860 0.4040 0.4130
6 1 1 ⁄ 2 0.2485 .2475 4 to 6 U 0.3680
I J
0.2720 0.2770 0.2810
V W
K
6 1 1 ⁄ 2 0.2485 .2475 4 to 6 X 0.3970
L 0.2900 M 0.2950
Y Z
All dimensions in inches. Material is high-speed steel. Tolerances: On diameter of reamer, for sizes A to E, incl., plus .0001 to plus .0004 inch and for sizes F to Z, incl., plus .0001 to plus .0005 inch. On overall length A , plus or minus 1 ⁄ 16 inch. On length of flute B , plus or minus 1 ⁄ 16 inch. Straight-Shank Chucking Reamers— Straight Flutes, Decimal Sizes ANSI/ASME B94.2-1995 (R2015)
D
B
A
Lgth. of Flute B
Shank Diameter D
Lgth. of Flute B
Shank Diameter D
Lgth. Overall A
No. of Flutes
Lgth. Overall A
No. of Flutes
Reamer Dia. 0.1240 0.1260 0.1865 0.1885 0.2490 0.2510 0.3115
Reamer Dia.
Max.
Min.
Max.
Min.
0.1190 0.1180 4 to 6 0.3135 0.1190 0.1180 4 to 6 0.3740 0.1805 0.1795 4 to 6 0.3760 0.1805 0.1795 4 to 6 0.4365 0.2405 0.2395 4 to 6 0.4385 0.2405 0.2395 4 to 6 0.4990 0.2792 0.2782 4 to 6 0.5010
6 7 7 7 7 8 8
0.2792 0.2782 4 to 6 0.3105 0.3095 6 to 8 0.3105 0.3095 6 to 8 0.3730 0.3720 6 to 8 0.3730 0.3720 6 to 8 0.4355 0.4345 6 to 8 0.4355 0.4345 6 to 8
1 1 ⁄ 2 1 3 ⁄ 4 1 3 ⁄ 4 1 3 ⁄ 4 1 3 ⁄ 4
3 1 ⁄ 2 3 1 ⁄ 2 4 1 ⁄ 2 4 1 ⁄ 2
7 ⁄ 8 7 ⁄ 8
1 1 ⁄ 8 1 1 ⁄ 8 1 1 ⁄ 2 1 1 ⁄ 2 1 1 ⁄ 2
6 6 6
2 2
All dimensions in inches. Material is high-speed steel. Tolerances: On diameter of reamer, for 0.124 to 0.249-inch sizes, plus .0001 to plus .0004 inch and for 0.251 to 0.501-inch sizes, plus .0001 to plus .0005 inch. On overall length A , plus or minus 1 ⁄ 16 inch. On length of flute B , plus or minus 1 ⁄ 16 inch.
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