Shaft 

Diameter

Part Number

A

Bore Diameter

B

Outside 

Diameter

C

Width

E

H

M

N

R

Housing 

Max

T

Y

Approx.

 Weight

1 7/16

3107U

1.4375

2.8350

1.31

2.50

2.92

2.30

1.75

0.05

0.66

1.09

2.40

1 11/16

3111U

1.6875

3.3469

1.58

2.88

3.18

2.58

2.03

0.05

0.68

1.22

3.40

1 15/16

3115U

1.9375

3.5438

1.53

3.19

3.28

2.75

2.31

0.05

0.72

1.22

3.50

2 3/16

3203U

2.1875

3.9375

1.66

3.50

3.50

3.25

2.62

0.05

0.92

1.25

4.90

2 7/16

3207U

2.4375

4.3312

1.75

3.88

3.65

3.55

2.90

0.05

0.94

1.31

6.00

2 1/2

3208U

2.5000

2 11/16

3211U

2.6875

5.1177

2.13

4.53

4.20

4.04

3.37

0.05

1.00

1.56

9.50

2 15/16

3215U

2.9375

3 7/16

3307U

3.4375

5.9050

2.31

5.34

4.57

4.90

3.98

0.05

1.00

1.72

13.00

3 1/2

3308U

3.5000

3 15/16

3315U

3.9375

7.0861

2.75

6.38

5.19

5.63

4.56

0.05

1.00

2.00

23.20