A BK-2 Sheave is a double-groove classical V-belt sheave designed for use with B-section belts. Compared with BK-1 sheaves, the dual groove structure allows higher horsepower transmission and improved belt stability for industrial equipment operating under heavier load conditions.
BK-2 sheaves are commonly used in compressors, conveyors, agricultural machinery, and industrial processing systems where reliable multi-belt transmission is required.
The wider B-section belt profile provides improved torque transmission and better durability compared with smaller A-section belt systems.
For more information or to request a quote on our BK-2 Sheave, please don't hesitate to contact us.
BK-2 Sheave Dimension
CTS can supply a complete range of BK-2 sheave sizes for different transmission requirements.
Part Number
Diameter
Type
Stock Finished Bores Includes Keyway and Setscrew
F
E
L Thru Bore
Weight Ib (Approx.)
OD
Datum A(4L)Belts
Pitch 3L Belts
2BK25
2.5
1.9
2.3
A
0.5
0.625
0.75
0.875
1.75
0.4688
1.9688
1.3
2BK26
2.6
2
2.4
A
0.625
0.875
1
1.125
1.75
0.4688
1.9688
1.5
2BK27
2.7
2.1
2.5
A
0.5
0.625
0.75
0.875
1
1.75
0.4688
1.9688
1.6
2BK28
2.95
2.2
2.6
A
0.5
0.625
0.75
0.875
1
1.125
1.75
0.4688
1.9688
1.9
2BK30
3.15
2.4
2.8
A
0.5
0.625
0.75
0.875
1
1.125
1.75
0.4688
1.9688
2.3
2BK32
3.35
2.6
3
A
0.625
0.875
1
1.125
1.75
0.4688
1.9688
2.6
2BK34
3.55
2.8
3.2
A
0.625
0.75
0.875
1
1.125
1.75
0.4688
1.9688
2.8
2BK36
3.75
3
3.4
A
0.75
0.875
1
1.125
1.375
1.75
0.4688
1.9688
3.3
2BK40
3.95
3.2
3.6
B
0.625
0.75
0.875
1
1.125
1.75
0.4688
1.4688
3.3
2BK45
4.25
3.5
3.9
B
1
1.125
1.375
1.75
0.4688
1.4688
3.3
2BK47
4.45
3.7
4.1
B
0.875
1
1.125
1.375
1.75
0.4688
1.4688
3.7
2BK50
4.75
4
4.4
B
0.75
1
1.125
1.375
1.75
0.4688
1.4688
4.1
2BK52
4.95
4.2
4.6
B
0.875
1
1.125
1.375
1.75
0.4688
1.4688
4.5
2BK55
5.25
4.5
4.9
B
1.125
1.375
1.75
0.4688
1.4688
4.5
2BK57
5.45
4.7
5.1
B
1
1.125
1.375
1.75
0.4688
1.4688
5.1
2BK60
5.75
5
5.4
B
0.75
0.875
1
1.125
1.375
1.75
0.4688
1.4688
4.9
2BK62
5.95
5.2
5.6
B
1
1.125
1.375
1.75
0.4688
1.4688
4.8
2BK65
6.25
5.5
5.9
B
1
1.125
1.375
1.75
0.4688
1.4688
5.0
2BK67
6.45
5.7
6.1
C
1
1.125
1.375
1.75
0.4688
1.4688
5.0
2BK70
6.75
6
6.4
C
0.75
1
1.125
1.1875
1.375
1.4375
1.75
0.3438
1.5938
6.6
2BK80
7.75
7
7.4
C
0.75
1
1.125
1.1875
1.375
1.4375
1.75
0.3438
1.5938
7.2
2BK90
8.75
8
8.4
C
0.75
1
1.125
1.1875
1.375
1.4375
1.75
0.3438
1.5938
8.4
2BK100
9.75
9
9.4
C
0.75
1
1.1875
1.4375
1.75
0.3438
1.5938
9.4
2BK110
10.75
10
10.4
C
1
1.1875
1.4375
1.75
0.3438
1.5938
10.4
2BK120
11.75
11
11.4
C
1
1.1875
1.4375
1.75
0.3438
1.5938
11.8
2BK130
12.75
12
12.4
C
1
1.1875
1.4375
1.75
0.3438
1.5938
14.9
2BK140
13.75
13
13.4
C
1
1.1875
1.4375
1.75
0.3438
1.5938
16.3
2BK160
15.75
15
15.4
C
1
1.1875
1.4375
1.75
0.3438
1.5938
18.0
2BK190
18.75
18
18.4
C
1
1.1875
1.4375
1.75
0.3438
1.5938
23.3
Additional sizes and customized dimensions are available according to customer requirements.
Bore & Mounting Options
CTS offers different bore configurations for various shaft installation systems.
Pilot Bore BK-2 Sheave
Suitable for customers requiring custom bore machining and keyway processing.
Finished Bore BK-2 Sheave
Supplied with finished bore and keyway for direct installation.
