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Canton, OH 44707

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Just a few of the ways that we have recently helped our customers solve some of their problems.


COOLING TOWER REDUCER REPAIR


LARGE POWER GENERATION
REDUCER REPAIR

 

 

 

Standard Keyway Sizes Based On Shaft & Bore Diameter- Imperial

In the English system, it is standard practice to dimension keyways. The hub keyway is dimensioned by its width and depth on the shaft keyway sides. Referencing Figure 1, the keyway dimension is W x T1. Unless otherwise specified, the shaft keyway is assumed to be standard. A list of standard keyway and corresponding key sizes for English shafts are listed below in Table 1. The common specification dimension, Keyway Size, is highlighted.

Nominal Shaft Diameter

Nominal Key Size

Normal Keyseat Depth

 

Set Screw Diameter

Width
"W"

Height

H/2

Over

To (Incl.)

Square

Rectangle

Square
(T1) Bore
(T2) Shaft

Rectangle

5/16

7/16

3/32

3/32

***

3/64

***

1/4

7/16

9/16

1/8

1/8

3/32

1/16

3/64

1/4

9/16

7/8

3/16

3/16

1/8

3/32

1-16

5/16

7/8

1-1/4

1/4

1/4

3/16

1/8

3/32

5/16

1-1/4

1-3/8

5/16

5/16

1/4

5/32

1/8

5/16

1-3/8

1-3/4

3/8

3/8

1/4

3/16

1/8

3/8

1-3/4

2-1/4

1/2

1/2

3/8

1/4

3/16

1/2

2-1/4

2-3/4

5/8

5/8

7/16

5/16

7/32

5/8

2-3/4

3-1/4

3/4

3/4

1/2

3/8

1/4

3/4

3-1/4

3-3/4

7/8

7/8

5/8

7/16

5/16

3/4

3-3/4

4-1/2

1

1

3/4

1/2

3/8

3/4

4-1/2

5-1/2

1-1/4

1-1/4

7/8

5/8

7/16

3/4

5-1/2

6-1/2

1-1/2

1-1/2

1

3/4

1/2

1

Square keys preferred for shaft diameters above this section; rectangular keys, below.

6-1/2

7-1/2

1-3/4

1-3/4

1-1/2*

7/8

3/4

1

7-1-2

9

2

2

1-1/2

1

3/4

1

9

11

2-1/2

2-1/2

1-3/4

1-1/4

7/8

1

 

 

 

 

   
   

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