Shaft Diameter

Fixed

Expansion

A

Pilot Diameter

B

Distance Between 

Bolt Holes

C

D

F

Bolts

H

J

K

L

Mounting 

 Surface to

 Collar Face

M

P

Q

R

Bolt 

 Circle Radius

T

U

W

X

Approx. Weight

Part Number

Part Number

1-7/16

FC-107-T

FC-107-TE

3.63

3.10

5.25

2.71

3/8

0.50

1.76

2.44

1.49

2.30

0.99

1.19

2.19

3/8-16

0.75

0.50

0.22

4.19

1-11/16

FC-111-T

FC-111-TE

4.25

3.62

6.13

2.76

7/16

0.50

1.79

2.43

1.52

2.58

0.91

1.25

2.56

7/16-14

0.88

0.61

0.23

6.15

1-15/16

FC-115-T

FC-115-TE

4.50

3.80

6.38

2.84

7/16

0.56

1.86

2.58

1.59

2.88

1.03

1.23

2.69

7/16-14

0.88

0.56

0.26

6.79

2-3/16

FC-203-T

FC-203-TE

5.00

4.24

7.13

2.99

1/2

0.56

1.88

2.78

1.61

3.25

0.95

1.42

3.00

1/2-13

1.00

0.66

0.26

9.16

2-7/16

FC-207-T

FC-207-TE

5.50

4.60

7.63

3.55

1/2

0.63

2.26

3.13

1.99

3.55

1.23

1.56

3.25

1/2-13

1.00

0.76

0.34

11.51

2-1/2

FC-208-T

FC-208-TE

2-11/16

FC-211-T

FC-211-TE

6.38

5.30

8.75

3.65

5/8

0.75

2.36

3.13

2.09

4.04

1.09

1.63

3.75

5/8-11

1.25

1.00

0.34

17.69

2-15/16

FC-215-T

FC-215-TE

3-7/16

FC-307-T

FC-307-TE

7.38

6.10

10.25

4.12

3/4

0.94

2.84

3.14

2.56

4.90

1.13

1.52

4.31

3/4-10

1.27

1.43

0.34

26.19

3-1/2

FC-308-T

FC-308-TE

3-15/16

FC-315-T

FC-315-TE

8.13

6.63

10.88

4.64

3/4

1.13

3.19

3.51

2.89

5.63

1.46

1.75

4.69

3/4-10

1.47

1.43

0.34

33.50