From Shop Reference for Students and Apprentices, Second Edition

Overview

ANSI Standard Keys and Keyseats. American National Standard, B17.1 Keys and Keyseats, based on current industry practice, was approved in 1967, and reaffirmed in 1989. This standard establishes a uniform relationship between shaft sizes and key sizes for parallel and taper keys as shown in Table 1. Other data in this standard are given in Tables 2 and 3 through 7. The sizes and tolerances shown are for single key applications only.

Table 1: Key Size Versus Shaft Diameter ANSI B17.1-1967 (R1998)

Nominal Shaft Diameter

Nominal Key Size

Normal Keyseat Depth

Height, H

H/2

Over

To (Incl.)

Width, W

Square

Rectangular

Square

Rectangular

5/16

7/16

3/32

3/32

3/64

7/16

9/16

1/8

1/8

3/32

1/16

3/64

9/16

7/8

3/16

3/16

1/8

3/32

1/16

7/8

1 1/4

1/4

1/4

3/16

1/8

3/32

1 1/4

1 3/8

5/16

5/16

1/4

5/32

1/8

1 3/8

1 3/4

3/8

3/8

1/4

3/16

1/8

1 3/4

2 1/4

1/2

1/2

3/8

1/4

3/16

2 1/4

2 3/4

5/8

5/8

7/16

5/16

7/32

2 3/4

3 1/4

3/4

3/4

1/2

3/8

1/4

3 1/4

3 3/4

7/8

7/8

5/8

7/16

5/16

3 3/4

4 1/2

1

1

3/4

1/2

3/8

4 1/2

5 1/2

1 1/4

1 1/4

7/8

5/8

7/16

5 1/2

6 1/2

1 1/2

1 1/2

1

3/4

1/2

Square Keys preferred for shaft diameters above this line; rectangular keys, below

6 1/2

7 1/2

1 3/4

1 3/4

1 1/2 [a]

7/8

3/4

7...

Copyright Industrial Press Inc. 2000 under license agreement with Books24x7

Products & Services
Sharpening Stones
Sharpening stones are used for sharpening edges and honing internal or external surfaces.  They are generally stones or bonded abrasive product with a rectangular block or shaped stick configuration. 
Hones and Honing Tools
Hones and honing tools are abrasive products used to refine the finish of internal bores and external surfaces.
Surface Preparation Services
Surface preparation services clean, strengthen and prepare surfaces for additional processing and/or refine or roughen surfaces to meet finishing requirements.
Finishing and Surface Treatment Services
Finishing and surface treatment services pretreat or finish the surfaces of manufactured components to meet roughness or surface condition requirements.
Vibratory Finishers and Mass Finishing Machines
Mass finishing machines use loose abrasives or tumbling media combined with cleaning or polishing compounds to bulk-finish parts.

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