Adjustable Center Drives
Series 21 Standard V-Belt Drives: 6M

 
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6M - 2.6:1 Speed Ratio
H.P.: 1 1/2 Motor Speed: 1800 RPM
H.P.: 1Motor Speed: 1200 RPM
series 21 dimensional drawing
A
2-1/8
B
1-3/4
C
2-1/4
D
6
E
3-13/16
L
4-11/16
Std. bore
5/8 | 3/4 | 7/8 | 1
keyway
3/16 | 3/16 | 3/16 | 1
bore depth
2-1/2 | 3 | 3 | 3
max bore
1
belt size
A
max. p.d.
5.7
min p.d.
2.15
weight
4.75 lb.
Driven Speeds
Driven
Sheave
Pitch
Diameter
Belt vs Minimum Center Distance
1800 RPM Motor
1200 RPM Motor
A 26
A 31
A 35
A 38
A 46
A 55
A 68
A 80
A 85
A 96
A 105
Max.
Min.
Max.
Min.
2052
789
1368
526
5.0
9.7
12.0
14.0
15.2
17.7
19.7
26.2
32.2
34.7
40.2
44.7
1710
657
1140
438
6.0
9.0
10.5
12.5
14.5
17.0
19.0
25.5
31.5
34.0
39.5
44.0
1465
563
976
375
7.0
8.2
9.7
11.7
13.7
16.2
18.2
24.7
30.7
33.2
38.7
43.2
1282
493
854
328
8.0
8.8
10.8
12.8
15.4
17.4
23.9
29.9
32.4
37.9
42.4
1140
438
760
292
9.0
10.0
12.0
14.5
16.5
23.1
29.1
31.6
37.1
41.6
1026
394
684
263
10.0
9.1
11.1
13.7
15.7
22.2
28.2
30.8
36.3
40.8
932
358
621
238
11.0
10.2
12.8
14.8
21.4
27.4
29.9
35.4
40.0
855
328
570
219
12.0
11.8
13.9
20.5
26.6
29.1
34.6
39.1
789
303
526
202
13.0
10.9
13.0
19.6
25.7
28.2
33.8
38.2

WARNING: All open belt drives must be adequately guarded for personal safety during operation.