Shaft 

Diameter

Part Number

B

Distance

 Between Bolt Holes

L

Mounting 

Surface to 

Collar Face

A

C

D

F

Bolts

H

J

M

N

P

Approx.

 Weight

Square

Circle

1 7/16

EFB22623H

3 1/2

4 61/64

3 29/64

3 11/16

4 5/8

2.71

1/2

1 3/8

4 1/32

2 1/4

6 1/16

31/64

8.00

1 15/16

EFB22631H

4 3/8

6 3/16

3 57/64

4 1/2

5 5/8

3.08

1/2

1 7/16

4 5/16

2 31/32

7 5/16

39/64

11.00

2 3/16

EFB22635H

4 7/8

6 57/64

4 3/32

5

6 1/4

3.16

5/8

1 9/16

4 5/8

3 5/32

8 9/32

5/8

15.00

2 7/16

EFB22639H

5 3/8

7 19/32

4 11/32

5 1/2

6 7/8

3.28

5/8

1 23/32

4 15/16

3 5/8

8 31/32

5/8

17.00

2 11/16

EFB22643H

6

8 31/64

4 59/64

6 1/2

7 3/4

3.86

3/4

1 25/32

5 13/32

4 5/32

10 1/8

45/64

25.00

2 15/16

EFB22647H

24.00

3 7/16

EFB22655H

7

9 59/64

5 21/64

7 3/8

9 1/4

4.29

3/4

1 31/32

5 3/4

4 15/16

11 21/32

55/64

41.00

3 15/16

EFB22663H

7 3/4

10 61/64

6 7/64

8 7/8

10 1/4

4.94

7/8

2 7/32

6 5/8

5 7/16

12 31/32

59/64

56.00