Standard“QD” Bushings  
Dimensions (Inches)
Stock Bore Range
Cap
Maximum
Average
Bushing
A
B
D
E
F
G
L
Bolt
Screws
Standard
Shallow
Weight
Circle
Required
Minimum
Keyway
Keyway
(Approx.)
JA
3/8
1.375
2
1-1/16
9/16
1/8
11/16
1.665
3-10 x 1
3/8
1
1-1/4
24-Oct
0.9
SH
7/16
1.871
2-11/16
7/8
13/16
1/8
15/16
21/4
3-1/4 x 1-3/8
1/2
1-3/8
11-1/16
1/4
1
SDS
1/2
2.187
3-3/16
7/8
3/4
1/8
13/8
211/16
3-1/4 x 1-3/8
1/2
11-1/16
2
1/4
1
SD
1/2
2.187
3-3/16
15/16
11/4
1/8
1-13/16
211/16
3-1/4 x 1-7/8
1/2
11-1/16
1-15/16
1/4
1.5
SK
9/16
2.812
3-7/8
1-3/8
11/4
1/8
1-15/16
35/16
3-5/16 x 2
1/2
2-1/8
2-1/2
5/16
2
SF
9/16
3.125
4-5/8
1-1/2
11/4
1/8
2-1/16
37/8
3-3/8 x 2
1/2
2-5/16
2-13/16
5/16
3
E
3/4
3.834
6
1-7/8
15/8
1/8
2-5/8
5
3-1/2 x 2-3/4
7/8
2-7/8
3-1/2
3/8
10
F
13/16
4.437
6-5/8
2-13/16
21/2
3/16
3-5/8
55/8
3-9/16 x 3-5/8
1
3-5/16
3-15/16
1/2
11.5
J
1
5.148
7-1/4
3-1/2
33/16
3/16
4-1/2
61/4
3-5/8 x 4-1/2
1-7/16
3-3/4
4-1/2
5/8
18
M
1-1/4
6.5
9
5-1/2
53/16
3/16
6-3/4
77/8
4-3/4 x 6-3/4
11-5/16
4-3/4
5-1/2
3/4
37
N
1-1/2
7
10-1/4
6-5/8
61/4
1/4
8-1/8
81/2
4-7/8 x 8-1/2
2-7/16
5-1/8
6
3/4
57
P
1-3/4
8.25
11-3/4
7-5/8
71/4
1/4
9-3/8
10
4-1 x 9-1/2
21-5/16
5-15/16
7
7/8
120
W
2
10.437
15
9-3/8
9
1/4
11-3/8
123/4
4-11/8 x 11-1/2
4
7-1/2
8-1/2
1
250
S
3-1/4
12.125
17-3/4
12-1/2
12
3/8
15-3/4
15
5-11/4 x 15-1/2
6
8-1/4
10
1-1/4
400

Every effort has been put forward to insure accuracy of this information, however if dimensions, loads, weights etc.
are critical for an application, please contact factory for clarification or certified drawings.

Copyright 2003 Martin Sprocket & Gear., Inc.

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