Portable Tool Spindles Machinery's Handbook, 31st Edition
1039
American Standard Threaded and Tapered Spindles for Portable Air and Electric Tools ASA B5.38-1958
R
D M
E G
D G
L G
L M
L
Threaded Spindle
Taper Spindle (Jacobs)
Master Plug Gage
Nom. Dia. and Thd.
Pitch Dia.
Taper per Foot b
R L Min. 3 ⁄ 8 -24 0.3479 0.3455 1 ⁄ 16 9 ⁄ 16 c Max. 1 ⁄ 2 -20 0.4675 0.4649 1 ⁄ 16 9 ⁄ 16 5 ⁄ 8 -16 0.5844 0.5812 3 ⁄ 32 11 ⁄ 16 3 ⁄ 4 -16 0.7094 0.7062 3 ⁄ 32 11 ⁄ 16
No. a
D M
L M
E G
D G
L G
1
0.335-0.333 0.656 0.38400 0.33341 0.65625 0.92508 0.490-0.488 0.750 0.54880 0.48764 0.7500 0.97861 0.490-0.488 0.875 0.55900 0.48764 0.87500 0.97861 0.563-0.561 1.000 0.62401 0.56051 1.000 0.76194 0.626-0.624 1.000 0.67600 0.62409 1.000 0.62292 0.748-0.746 1.219 0.81100 0.74610 1.21875 0.63898
2S d
2
33
6 3
a Jacobs taper number. b Calculated from E
G , D G , L G for the master plug gage.
c Also 7 ⁄ 16 inch. d 2S stands for 2 Short. All dimensions in inches. Threads are per inch and right-hand. Tolerances: On R , plus or minus 1 ⁄ 64 inch; on L , plus 0.000, minus 0.030 inch.
American Standard Abrasion Tool Spindles for Portable Air and Electric Tools ASA B5.38-1958 Sanders and Polishers
Max. 3/32
+ 0.000 – 1/16
15/16
5/8-11 UNC-2A
Vertical and Angle Grinders
Max. 3/32
Max. 3/32
Guard
1-1/8
1-1/8
5/8-11 UNC-2A
5/8-11 UNC-2A
With Revolving Cup Guard
Stationary Guard
Copyright 2020, Industrial Press, Inc.
ebooks.industrialpress.com
Made with FlippingBook - Share PDF online