AGMA 2015-1-A01

This part of ANSI/AGMA 2015 establishes an accuracy grade systemrelevant to tangential measurements on flanks of individualcylindrical involute gears.

It specifies definitions for gear tooth accuracy terms, thestructure of the gear accuracy grade system, and allowablevalues.

It is strongly recommended that any user of this part ofANSI/AGMA 2015 be very familiar with the methods and proceduresoutlined in AGMA 915-1-A02. Use of techniques other than those ofAGMA 915-1-A02 combined with the limits described in this part ofANSI/AGMA 2015 may not be suitable.

This standard provides the gear manufacturer and the gear buyerwith a mutually advantageous reference for uniform tolerances. Tenaccuracy grades are defined in this standard, numbered A2 throughA11, in order of decreasing precision.

Equations for tolerances

Equations for tolerances and their ranges of validity areprovided in 7.2 for the defined accuracy of gearing. In general,these tolerances cover the following ranges:

5 ≤z≤ 1000 or 10000/mnwhichever is less

5 mm≤D≤ 10 000 mm

0.5 ≤mn≤ 50

4 mm≤b≤ 1000 mm

β ≤ 45°

where

D is pitch diameter;

m_n is normal module;

b is facewidth (axial);

z is number of teeth;

β is helix angle.

See clause 4 for required and optional measuring methods.

Exceptions

This standard does not apply to enclosed gear unit assemblies,including speed reducers or increasers, gear motors, shaft mountedreducers, high speed units, or other enclosed gear units which aremanufactured for a given power, speed, ratio or application.

Gear design is beyond the scope of this standard. The use of theaccuracy grades for the determination of gear performance requiresextensive experience with specific applications. Therefore, theusers of this standard are cautioned against the direct applicationof tolerance values to a projected performance of unassembled(loose) gears when they are assembled. Refer to the latest AGMAPublications Index for applicable standards.

NOTE: Tolerance values for gears outside thelimits stated in this standard should be established by determiningthe specific application requirements. This may require setting atolerance smaller than calculated by the formulas in thisstandard.

Edition:

A01

Published:

08/01/2001

ANSI:

ANSI Approved

Number of Pages:

44

File Size:

1 file , 430 KB