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Delivering quality custom gears for years
Standards & Tolerances

Standards and tolerances have been established to ensure our customers get consistently accurate, dependable parts.

Backlash - Our gears are cut to operate on standard center distances with backlash. The backlash for mating gears, when assembled, is shown in the table below.

Concentricity - The concentricity of the pitch line with bore (TIR - total indicator reading) is held to the tolerances specified in the table below. Other dimensions are held to standard commercial tolerances and finishes.

Bores - Our gears are bored, honed or ground to a smooth finish and held to tolerances as follows:

1/4" diameter bore to 1" diameter bore +-.0005"
1-1/16" diameter bore to 2" diameter bore +-.00075
Please call for bores larger than 2" -- 800-523-2576

Diametral Pitch
Circular Pitch
Metric Pitch (module)
Backlash
Concentricity
2 DP
1-1/2" CP
12 MOD
.010-.015"
.008
2.5 DP
1-1/4" CP
10 MOD
.010-.015"
.008
3 DP
1" CP
8 MOD
.009-.014"
.006
4 DP
3/4" CP
6 MOD
.007-.011"
.006
5 DP
5/8" CP
5 MOD
.006-.009"
.005
6 DP
1/2" CP
4 MOD
.005-.008"
.005
8 DP
3/8" CP
3 MOD
.004-.006"
.005
10 DP
5/16" CP
2.5 MOD
.003-.005"
.004
12 DP
1/4" CP
2 MOD
.003-.005"
.004
16 DP
3/16" CP
1.5 MOD
.002-.004"
.0025
20 DP
1.25 MOD
.002-.004"
.0025
24 DP
1/8" CP
1 MOD
.002-.004"
.0025
32 DP
1/10" CP
.75 MOD
.002-.003"
.002
48 DP
1/16" CP
.5 MOD
.002-.003"
.002
64 DP
1/20" CP
.4 MOD
.002-.003"
.002
*Parts conform to tolerances spelled out on customer's drawings when supplied.