racy documents correlate as shown in Figure 1. Current Status of New Standards. In late , the new tangential accuracy stan- dard ANSI/AGMA A AGMA A01 (R). Accuracy Classification System – Tangential Measurements for Cylindrical Gears. standard by American Gear. CONTAINS ANSI/AGMA A ACCURACY CLASSIFICATION SYSTEM- TANGENTIAL MEASUREMENTS FOR CYLINDRICAL GEARS AND AGMA.

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This annex provides descriptions of filtering practices. An important note agmq that, in the past, gears finer than 20DP were classified and inspected by AGMA for 20151–a01 testing only and did not require analytical inspection of lead, profile, and spacing.

Measurement values from elemental test instruments that measure in a direction other than normal and not in the specified tolerancing direction, require more complex adjustments before comparison to tolerances. Log into your account. It is defined by specification of datum surfaces.

An example of the differences between these analysis methods is provided by figure E. Gears made in quantity may be inspected at various steps in their manufacturing process on a sampling basis. Tolerances for single pitch deviation are provided by the formula in 7.

A New Standard in Gear Inspection

Distinction is not made as to the direction or algebraic sign of this reading. Axial runout may also be indicated by a shifting of the tooth contact from side to side, progressively around the gear.

It was approved as an American National Standard on September 30, Tolerance values for gears outside the limits stated in this standard should be established by determining the specific application requirements.

Consultant Profile Engineering, Inc. All RC electrical filters produce phase shifting of test data. Electrical filtering is most commonly encountered on older instruments; newer instruments employ mathematical filtering. Measurement and control of short duration roughness is beyond the 2015-1-z01 of this standard. This standard provides tolerances for unassembled gears only.


All manufacturing parameters must consider the need to produce the equivalent of accuracy grade A4 gears to meet the SPC requirements.

We will also report on current trends in gear inspection machine development and the increased capabilities that are offered. Brad Foote Gear Works, Inc. It is important to understand that various gear measuring instruments use different testing procedures, some measuring in the normal direction, some measuring in other directions.

When properly applied, gears manufactured by specific control techniques will be found to be of uniform accuracy. Suggestions for improvement of this standard will be welcome.

The choice of filtering method and cutoff wavelength will influence analysis results. In general, these tolerances cover the following ranges: For undated references, the latest edition of the referenced document including any amendments applies.

Methods of measuring some of these characteristics are discussed in AGMA A02, and in the annexes. The matching process for such gears sold as pairs assumes greater importance than the individual absolute measurements.

Measurements at any other inclination will be larger. The content was revised, but basic tolerance levels were unchanged from AGMA The design, accuracy, and cost of a master gear must be negotiated between the manufacturer and purchaser.

It is not a design manual for determining the specific quality levels for a given application. These tolerances are applicable to the following ranges: In this standard, lower AGMA accuracy grades designate higher precision in order to be consistent with international standards.

This standard provides tolerances for unassembled gears. It does not necessarily indicate compatible tooth shape for loaded conditions. Nippon Gear Company, Ltd. An example of how to establish an AGMA classification number for a given set of conditions is presented in figure 5. Example of statistical process control SPC application. To determine the manufacturing requirement, the following starting recommended: A gear which is specified to an AGMA accuracy grade must meet all the individual tolerance requirements applicable to the particular accuracy grade and size as noted in tables 4 and 5.


Such a distinction would require a purely arbitrary specification of a direction clockwise or counterclockwise traveled between the two teeth comprising the total cumulative pitch deviation. The exclusion of certain portions of the test data frequency spectrum is called filtering.

Future of gear design relies on overcoming present July 15, An unfortunate effect of RC electrical filtering is a phase shifting of data that can influence analysis of test results.

Accuracy grades A2 through A11 0.

A New Standard in Gear Inspection | Gear Solutions Magazine Your Resource to the Gear Industry

Calculated values for tooth–to–tooth single flank composite tolerance have been reduced to account for the filtered analysis used within this standard. Fis fis cp Size: This standard is not included in any packages.

This standard specifies the direction of tolerancing for profile deviation to be in a transverse plane, on a line tangent to the base circle. Subscription pricing is determined by: 2015-1-w01 general types of mathematical filter are commonly available.

If the measuring instrument reads in inches, values calculated from the equations in 7.