Machinery's Handbook, 31st Edition
1040
Portable Tool Spindles American Standard Abrasion Tool Spindles for Portable Air and Electric Tools ASA B5.38-1958 Portable Air and Electric Tools ASA B5.38-1958 (Continued)
Straight Wheel Grinders
Cone Wheel Grinders
Max. 3/32
R
H
L
L
D
H
R
L
D
L
3 ⁄ 8 -24 UNF-2A 1 ⁄ 2 -13 UNC-2A 5 ⁄ 8 -11 UNC-2A 5 ⁄ 8 -11 UNC-2A
1 1 ⁄ 8 1 3 ⁄ 4 2 1 ⁄ 8 3 1 ⁄ 8
3 ⁄ 8 -24 UNF-2A 1 ⁄ 2 -13 UNC-2A 5 ⁄ 8 -11 UNC-2A
1 ⁄ 4 3 ⁄ 8 1 ⁄ 2
9 ⁄ 16
11 ⁄ 16 15 ⁄ 16
1 1
3 ⁄ 4 -10 UNC-2A 3 1 ⁄ 4 All dimensions in inches. Threads are right-hand.
American Standard Hexagonal Chucks and Shanks for Portable Air and Electric Tools ASA B5.38-1958
B
H
L
H
H
Nominal Hexagon
Nominal Hexagon
L Max.
L Max.
Min.
Max.
Min.
Max.
B
B
0.253 0.255 0.314 0.316 0.442 0.444
0.630 0.632 0.755 0.758
1 5 ⁄ 8 1 7 ⁄ 8
15 ⁄ 16
5 ⁄ 8 3 ⁄ 4
1 ⁄ 4
3 ⁄ 8
11 ⁄ 32 11 ⁄ 32
1
13 ⁄ 64 17 ⁄ 64
5 ⁄ 16 7 ⁄ 16
… … … … …
1 1 ⁄ 8
Shanks 0.4375 0.4350
0.750 0.747
0.625 0.622
0.312 0.310
0.250 0.248
1 2 11
23 32 17
55 64
3 16
1 4
21 32
32
32
3 16
1 4
11 32
5 16
5 16
1 16
1 4
3 R
1
7 R
1
1
5 R
5 R
3 R
3 64
1 32
72
1 16
1 16
64
1 16
32
32
32
3 4
1
2
5 16
1 4
7 16
5 8
3 4
All dimensions in inches. Tolerance on B is plus or minus 0.005 inch.
Copyright 2020, Industrial Press, Inc.
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