AGMA Fine Pitch Tolerances / Quality Grades for Gears

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The gear tolerance chart below, lists the more common tolerance or quality specifications assigned for Spur, Helical and Herringbone type gears. Typically, the AGMA tolerance or quality number is provided on the engineering drawing face as part of a general requirements specification, such as a flag or delta note.

AGMA - Fine Pitch Gear Tolerances

AGMA Quality (Tolerance) Designation Number. of Teeth and Pitch Diameter. Diametral Pitch Range Tooth to tooth Composite Tolerance Total  Tolerance
10 Up to 20 Teeth 
Over 20 Teeth
Up to 1.999"
Over 20 teeth
2" to 3.999"
Over 20 teeth 
4" and over
20 to 200

20 to 200

20 to 200

20 to 200

.0007

.0005

.0005

.0005

.0010

.0010

.0012

.0014

11 Up to 20 teeth
Over 20 teeth
Up to 1.999"
Over 20 teeth
2" to 3.999"
Over 20 teeth 
4" and over
20 to 200

20 to 200

20 to 200

20 to 200

.0005

.0004

.0004

.0004

.0007

.0007

.0009

.0010

12 Up to 20 teeth 
Over 20 teeth
Up to 1.999"
Over 20 teeth
2" to 3.999"
Over 20 teeth 
4" and over
20 to 200

20 to 200

20 to 200

20 to 200

.0004

.0003

.0003

.0003

.0005

.0005

.0006

.0007

13 Up to 20 teeth 
Over 20 teeth
Up to 1.999"
Over 20 teeth 
2" to  3.999"
Over 20 teeth 
4" and over
20 to 200

20 to 200

20 to 200

20 to 200

.0003

.0002

.0002

.0002

.0004

.0004

.0004

.0005

14 Up to 20 teeth 
Over 20 teeth
Up to 1.999"
Over 20 teeth 
2" to  3.999"
Over 20 teeth 
4" and over
20 to 200

20 to 200

20 to 200

20 to 200

.00019

.00014

.00014

.00014

.00027

.00027

.00032

.00037

15 Up to 20 teeth 
Over 20 teeth
Up to 1.999"
Over 20 teeth 
2" to  3.999"
Over 20 teeth 
4" and over
20 to 200

20 to 200

20 to 200

20 to 200

.00014

.00010

.00010

.00010

.00019

.00019

.00023

.00027

References: AGMA 390.2 (Gear Classifications for Spur, Helical and Herringbone)

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