Shaft 

Diameter

Part Number

A

Pilot 

Diameter

B

Bolt Hole 

Circle 

Diameter

L

Mounting 

Surface to 

Collar Face

C

D

F

Bolts

G

H

M

U

Y

Approx. 

Weight

3

FC3U2E48N*Δ

6.375

7 1/2

1 13/16

8 3/4

2 7/8

5/8

3/16

1 1/16

4 5/8

1 1/4

2 7/32

17.70

75.00

FC3U2M75N*Δ

161.920

190.50

46.00

222.20

73.02

16.00

4.80

27.00

117.50

31.80

56.40

8.00

3 7/16

FC3U255N*Δ

7.375

8 5/8

2 13/32

10 1/4

3 9/16

3/4

-

1 5/8

5 3/16

1 5/32

2 25/32

34.00

3 1/2

FC3U2E56N*Δ

85.00

FC3U2M85N*Δ

187.320

219.08

61.10

260.40

90.49

20.00

-

41.30

131.80

29.40

70.60

15.30

3 15/16

FC3U263N*

8.120

9 3/8

3 1/8

10 7/8

4 1/4

3/4

-

2 1/8

5 15/16

1 1/8

3 9/16

41.80

4

FC3U2E64N*

100.00

FC3U2M100N*

206.250

238.12

79.40

276.20

107.95

20.00

-

54.00

150.80

28.60

90.50

18.80