AMERICAN GEARS meet the most exacting tolerances and specifications.

Correlation of Former Fine-Pitch Gear Classes (AGMA 236.04) with the Quality Numbering System of the Gear Classification Manual (AGMA 390.01)

 Previous AGMA STANDARD Correlation of Quality #'s of 
 AGMA 236.04 New System, AGMA 390.01
 Commercial 1 5 or 6
 Commercial 2 6 or 7
 Commercial 3 8
 Commercial 4 9
 Precision 1 10 or 11
 Precision 2 12
 Precision 3 13 or 14

GEAR TOLERANCES- Fine Pitch Spur and Helical Gears 

 AGMA # of Teeth Diametral Pitch Tooth-to-Tooth Total Comp.
Qual.# & Pitch Diamter Range Comp. Tolerance Tolerance
 
 5 Up to 20 Teeth Incl. 20 to 80 .0037 .0052

Over 20 Teeth Up to 1.999" 20 to 32	 .0027 .0052

Over 20 Teeth 2" to 3.999" 20 to 24 .0027 .0061

Over 20 Teeth -4" and over 20 to 24	 .0027 .0072
6 Up to 20 Teeth Incl. 20 to 200 .0027 .0037

Over 20 Teeth-Up to 1.999" 20 to 48 .0019 .0037

Over 20 Teeth -2" to 3.999" 20 to 32 .0019 .0044

Over 20 Teeth -4" and over 20 to 24 .0019 .0052
7 Up to 20 Teeth Incl. 20 to 200 .0019 .0027

Over 20 Teeth-Up to 1.999" 20 to 100 .0014 .0027

Over 20 Teeth -2" to 3.999" 20 to 48 .0014 .0032

Over 20 Teeth -4" and over 20 to 40 .0014 .0037
8 Up to 20 Teeth Incl. 20 to 200 .0014 .0019

Over 20 Teeth-Up to 1.999" 20 to 200 .0010 .0019

Over 20 Teeth -2" to 3.999" 20 to 100 .0010 .0023

Over 20 Teeth -4" and over 20 to 64 .0010 .0027
9 Up to 20 Teeth Incl. 20 to 200 .0010 .0014

Over 20 Teeth-Up to 1.999" 20 to 200 .0007 .0014

Over 20 Teeth -2" to 3.999" 20 to 200 .0007 .0016

Over 20 Teeth -4" and over 20 to 120 .0007 .0019
10 Up to 20 Teeth Incl. 20 to 200 .0007 .0010

Over 20 Teeth-Up to 1.999" 20 to 200 .0005 .0010

Over 20 Teeth -2" to 3.999" 20 to 200 .0005 .0012

Over 20 Teeth -4" and over 20 to 200 .0005 .0014
11 Up to 20 Teeth Incl. 20 to 200 .0005 .0007

Over 20 Teeth-Up to 1.999" 20 to 200	 .0004 .0007

Over 20 Teeth -2" to 3.999" 20 to 200 .0004 .0009

Over 20 Teeth -4" and over 20 to 200 .0004 .0010
12 Up to 20 Teeth Incl. 20 to 200 .0004 .0005

Over 20 Teeth-Up to 1.999" 20 to 200 .0003 .0005

Over 20 Teeth -2" to 3.999" 20 to 200 .0003 .0006

Over 20 Teeth -4" and over 20 to 200 .0003 .0007

American Gears...

American Gear, Inc.
P.O. Box 156, Route 78
Prophetstown, IL 61277
Ph. (815) 537-5111
FAX (815) 537-2871

Copyright (c) 1996 Thomas Publishing Company