V-Belts, Bushings & Sheaves
Conventional V-Belt Drive Bushings
| Bushing Size
|
Bore"
|
Keyseat"
|
| SH
|
1/2-1 3/8
|
STD
|
|
1 7/16-1 5/8
|
3/8X1/16
|
|
1 11/16
|
NONE
|
|||
| SDS
|
1/2-1 11/16
|
STD
|
|
1 3/4
|
3/8X1/8
|
|
1 13/16
|
1/2X1/8
|
|
1 7/8-1 15/16
|
1/2X1/16
|
|
2
|
NONE
|
|||
| SD
|
1/2-1 11/16
|
STD
|
|
1 3/4
|
3/8X1/8
|
|
1 13/16
|
1/2X1/8
|
|
1 7/8-1 15/16
|
1/2X1/16
|
|
2
|
NONE
|
|||
| SK
|
1/2-2 1/8
|
STD
|
|
2 3/16-2 1/4
|
1/2X1/8
|
|
2 5/16-2 1/2
|
5/8X1/16
|
|
2 9/16-2 5/8
|
NONE
|
|||
| SF
|
1/2-2 1/4
|
STD
|
|
2 5/16-2 1/2
|
5/8X3/16
|
|
2 9/16-2 3/4
|
5/8X1/16
|
|
2 13/16-2 15/16
|
NONE
|
|||
| E
|
7/8-2 3/4
|
STD
|
|
2 13/16-3 1/4
|
3/4X1/8
|
|
3 15/16-3 7/16
|
7/8X1/16
|
|
3 1/2
|
NONE
|
Bushing Size Chart
| Pitch Dia.
|
# of Belts
|
| "A" Belt
|
"B"Belt
|
1
|
2
|
3
|
4
|
5
|
6
|
| 3.0
|
3.4
|
SH
|
SH
|
SH
|
SD
|
SD
|
SD
|
| 3.2
|
3.6
|
SH
|
SH
|
SH
|
SD
|
SD
|
SD
|
| 3.4
|
3.8
|
SH
|
SH
|
SH
|
SD
|
SD
|
SD
|
| 3.6
|
4.0
|
SH
|
SH
|
SH
|
SD
|
SD
|
SD
|
| 3.8
|
4.2
|
SH
|
SH
|
SH
|
SD
|
SD
|
SD
|
| 4.0
|
4.4
|
SH
|
SH
|
SH
|
SD
|
SD
|
SD
|
| 4.2
|
4.6
|
SDS
|
SDS
|
SD
|
SD
|
SD
|
SD
|
| 4.4
|
4.8
|
SDS
|
SDS
|
SD
|
SD
|
SD
|
SD
|
| 4.6
|
5.0
|
SDS
|
SDS
|
SD
|
SD
|
SD
|
SD
|
| 4.8
|
5.2
|
SDS
|
SDS
|
SD
|
SD
|
SD
|
SD
|
| 5.0
|
5.4
|
SDS
|
SDS
|
SD
|
SD
|
SK
|
SK
|
| 5.2
|
5.6
|
SDS
|
SDS
|
SD
|
SD
|
SK
|
SK
|
| 5.4
|
5.8
|
SDS
|
SDS
|
SD
|
SD
|
SK
|
SK
|
| 5.6
|
6.0
|
SDS
|
SDS
|
SD
|
SD
|
SK
|
SK
|
| 5.8
|
6.2
|
SDS
|
SDS
|
SD
|
SD
|
SK
|
SK
|
| 6.0
|
6.4
|
SDS
|
SDS
|
SD
|
SD
|
SK
|
SK
|
| 6.2
|
6.6
|
SDS
|
SDS
|
SD
|
SD
|
SK
|
SK
|
| 6.4
|
6.8
|
SDS
|
SDS
|
SD
|
SD
|
SK
|
SK
|
| 6.6
|
7.0
|
SDS
|
SK
|
SK
|
SK
|
SF
|
SF
|
| 7.0
|
7.4
|
SDS
|
SK
|
SK
|
SK
|
SF
|
SF
|
| 7.6
|
8.0
|
SDS
|
SK
|
SK
|
SF
|
SF
|
SF
|
| 8.2
|
8.6
|
SDS
|
SK
|
SK
|
SK
|
SF
|
SF
|
| 9.0
|
9.4
|
SDS
|
SK
|
SK
|
SK
|
SF
|
SF
|
| 10.6
|
11.0
|
SDS
|
SK
|
SK
|
SK
|
SF
|
SF
|
| 12.0
|
12.4
|
SDS
|
SK
|
SK
|
SK
|
SF
|
SF
|
| 13.2
|
13.6
|
SDS
|
SK
|
SK
|
SK
|
SF
|
SF
|
| 15.0
|
15.4
|
SK
|
SK
|
SK
|
SF
|
SF
|
SF
|
| 15.6
|
16.0
|
SK
|
SK
|
SK
|
SF
|
SF
|
SF
|
| 18.0
|
18.4
|
SK
|
SK
|
SK
|
SF
|
SF
|
SF
|
| 19.6
|
20.0
|
SK
|
SF
|
SF
|
SF
|
E
|
E
|
| 24.6
|
25.0
|
-
|
SF
|
SF
|
E
|
E
|
E
|
| 29.6
|
30.0
|
-
|
SF
|
SF
|
E
|
E
|
E
|
| 37.6
|
38.0
|
-
|
SF
|
E
|
E
|
E
|
E
|
For A-B Sheave, outer diameter = Pitch diameter + .35"
Belt Length = 2C + 1.57(D + d) + (D - d)2 / 4C
Where:
C = Center Distance between shafts
D = Diameter of large sheave
d = Diameter of small sheave