Shaft Diameter

Part Number

A

Pilot Diameter

B

Distance Between Bolt Holes

L

Mounting Surface to 

Collar Face

R

Bolt Circle Radius

C

D

F

Bolts

H

J

M

P

U

Approx. Weight

3 1/2

ZBR2308

7.375

6 3/32

2 3/8

4 5/16

10 1/4

4 3/8

3/4

15/16

2

4 29/32

15/16

1 1/4

33.50

80.00

ZBR2080MM

187.325

154.79

60.33

109.54

260.35

111.13

19.00

23.81

50.80

124.62

23.81

31.75

16.10

85.00

ZBR2085MM

15.70

90.00

ZBR2090MM

15.20

3 11/16

ZBR2311

8.125

6 5/8

2 11/16

4 11/16

10 7/8

5 1/16

3/4

1 1/8

2 1/2

5 5/8

1 1/32

1 1/2

52.00

3 15/16

ZBR2315

49.00

4

ZBR2400

48.50

100.00

ZBR2100MM

206.375

168.28

68.26

119.06

276.23

128.59

19.00

28.58

63.50

142.88

26.19

38.10

22.20