Standards & Tolerances

Production Time Options: Click here for more info.	Crisis	Urgent	Critical	Quick	Standard
Production Time Options: Click here for more info.	48 Hours	72 Hours	1 Week	2 Weeks	3 Weeks

Production Time Options: Click here for more info.
Crisis	48 Hours
Urgent	72 Hours
Critical	1 Week
Quick	2 Weeks
Standard	3 Weeks

Established so you get consistently accurate, dependable parts.

*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.

Backlash & concentricity by pitch

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

Bores

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

Bore diameter	Tolerance
1/4" to 1"	±.0005"
1-1/16" to 2"	±.00075"
Larger than 2"	Please call 800-523-2576

*Parts conform to tolerances spelled out on customer's drawings when supplied.