American Gear, Inc. has implemented our own in-house Quality Control Department to ensure you receive the excellence that you deserve. We have created formal documented Quality Assurance program that follows ISO 9000 Standards, a Quality Assurance Manual, and a Standard Operating Procedures Manual.

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

Previous Fine-Pitch System, AGMA 236.04Fine Pitch System, AGMA 390.02
AGMA Quality
No.		Tooth-to-Tooth Composite ErrorTotal Composite ErrorAGMA Quality No.Tooth-to-Tooth Composite (Error) ToleranceTotal Composite (Error) Tolerance
Commercial 10.00200.00605 or 60.0027 or 0.00190.0052 or 0.0037
Commercial 20.00150.00406 or 70.0019 or 0.00140.0037 or 0.0027
Commercial 30.00100.002080.00100.0019
Commercial 40.00070.001590.00070.0014
Precision 10.00040.001010 or 110.0005 or 0.00040.0010 or 0.0007
Precision 20.00030.0005120.00030.0005
Precision 30.00020.0002513 or 140.0002 or 0.000140.0004 or 0.00027

Gear Tolerances - Fine Pitch Spur and Helical Gears

AGMA Quality
No.		Number of Teeth and Pitch DiameterDiametral Pitch RangeTooth-to-Tooth Composite ToleranceTotal Composite Tolerance
5Up to 20 teeth inclusive20 to 800.00370.0052
Over 20 teeth, up to 1.999"20 to 320.00270.0052
Over 20 teeth, 2" to 3.999"20 to 240.00270.0061
Over 20 teeth, 4" and over20 to 240.00270.0072
6Up to 20 teeth inclusive20 to 2000.00270.0037
Over 20 teeth, up to 1.999"20 to 480.00190.0037
Over 20 teeth, 2" to 3.999"20 to 320.00190.0044
Over 20 teeth, 4" and over20 to 240.00190.0052
7Up to 20 teeth inclusive20 to 2000.00190.0027
Over 20 teeth, up to 1.999"20 to 2000.00140.0027
Over 20 teeth, 2" to 3.999"20 to 480.00140.0032
Over 20 teeth, 4" and over20 to 400.00140.0037
8Up to 20 teeth inclusive20 to 2000.00140.0019
Over 20 teeth, up to 1.999"20 to 2000.00100.0019
Over 20 teeth, 2" to 3.999"20 to 1000.00100.0023
Over 20 teeth, 4" and over20 to 640.00100.0027
9Up to 20 teeth inclusive20 to 2000.00100.0014
Over 20 teeth, up to 1.999"20 to 2000.00070.0014
Over 20 teeth, 2" to 3.999"20 to 2000.00070.0016
Over 20 teeth, 4" and over20 to 1200.00070.0019
10Up to 20 teeth inclusive20 to 2000.00070.0010
Over 20 teeth, up to 1.999"20 to 2000.00050.0010
Over 20 teeth, 2" to 3.999"20 to 2000.00050.0012
Over 20 teeth, 4" and over20 to 2000.00050.0014
11Up to 20 teeth inclusive20 to 2000.00050.0007
Over 20 teeth, up to 1.999"20 to 2000.00040.0007
Over 20 teeth, 2" to 3.999"20 to 2000.00040.0009
Over 20 teeth, 4" and over20 to 2000.00040.0010
12Up to 20 teeth inclusive20 to 2000.00040.0005
Over 20 teeth, up to 1.999"20 to 2000.00030.0005
Over 20 teeth, 2" to 3.999"20 to 2000.00030.0006
Over 20 teeth, 4" and over20 to 2000.00030.0007