AGMA 390.03 PDF

AGMA Gear Handbook Gear Classification, Materials and Measuring Methods for Bevel, Hypoid CNCL S/S BY AGMA * CONTAINS FOLDOUT. Buy AGMA A (R) Handbook – Gear Classification, Materials And Measuring Methods For Bevel, Hypoid, Fine Pitch Wormgearing And Racks . Jan 12, Buy AGMA GEAR CLASSIFICATION, MATERIALS AND MEASURING METHODS FOR UNASSEMBLED GEARS from SAI.

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Item Detail – AGMA

When applications warrant, detailed specific measurements, data analysis, and additional considerations may be necessary to establish acceptance criteria for a gear. Considerations for certain gearing applications may require a high degree of accuracy in the angular position of the teeth. It is not intended for use as a reference in the procurement of enclosed drives.

Most bevel gear sets require a specific amount of backlash with tolerance. The tooth–to–tooth composite variation and total composite variation can be evaluated by meshing with a reference gear which has smaller variations than those expected in the gears to be measured.

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When the gear is shaved, it is run with a tool that 390.003 a constant, rigid center distance, but is not connected to the workpiece by a drive train. Datum circle Figure 4 — Schematic of two probe device 5. Testing gears in this manner more closely simulates operation of the gears in their application than any other means of evaluation.

The topland of a gear tooth is the surface of the top of the tooth. All manufacturing parameters must consider the need to produce the equivalent of accuracy grade B4 gears to meet the SPC requirements.

Be careful not to apply too much: With this technique, the areas that contact can be observed by coating avma teeth with a marking compound, and running the gears for a few seconds under light load. This measurement technique may be applied to soft non–heat treated and hard heat treated bevel pinions and gears, and is useful for manufacturing corrections, heat treat distortion evaluations, fitness–for–use decisions, etc.


Examples of these are: Avma variations in mounting distance, which occur as the gears are rotated together in tight mesh, are either recorded on a chart or require the 930.03 of a dial indicator.

Mounting distance Mounting distance Mounting distance variation resulting from runout run in tight mesh Figure 16 — Mounting distance and variation measurement 5.

The design, accuracy, AGMA accuracy grade validation procedure and cost of a reference gear must be negotiated between the manufacturer and purchaser.

When properly applied, gears manufactured 390.033 specific control techniques will be found to be of very uniform quality. Out–of–roundness may be caused by errors in machine tools, cutting tools, lack of rigidity in setup, hardness variation in the gear blank or heat treat distortion.

The Gear Works — Seattle, Inc. CMM measurement is based on a carefully defined set of grid points on the tooth flank: Next, place a piece of transparent mending tape over the entire tooth that has the contact pattern and apply a small amount of pressure not too much; often, a cotton swab is used 39.003 gently wipe the tape across the tooth surface.

These tolerances directly affect the gear tooth flank geometry and accuracy. Basically you can use any version of AGMA as long as agma Tolerance system development and comparison. Double flank composite SF: The recommended loads were developed empirically based on a face width of 25 mm.

The runout is characterized by periodic variation in sound during each revolution, and by tooth bearing contact pattern shifting progressively around the gear from heel to toe and from toe to heel. Provision is required for the work and reference gears to rotate with a minimum of runout or wobble. The backlash measurement is to be taken with the bevel pinion and gear located at the correct mounting distances.


It provides guidance on specifying quality agma Mount the bevel pinion and gear in a roll test machine in a manner that accurately simulates the theoretical position in the application. The choice of coordinate system varies as determined by the gear engineer.

Method CM Bevel pinion and gear tooth flank shape may be defined mathematically and subsequently measured by a suitable CMM with associated special software. The upper envelope is the long term component and the vertical distance between the upper and lower envelope is the short agmx component. Here is a Google keyword search, 3900.3 to.

In the study the teeth must be randomly chosen as would be the case in production.

Bevel Gear Classification, Tolerances, and Measuring Methods

390.30 considerations may include items such as: The total movement between the toe and heel readings is obtained by subtracting the heel reading from the toe readings algebraically.

In this standard, lower AGMA accuracy grades designate higher precision in order to be consistent with international standards. It may be necessary to 3900.03 the load for a face width greater than 25 mm; if so, this is to be done proportionally with agreement between the user and supplier. It is assumed that these measurements are representative of all the teeth on the gear. This clause presents considerations for control of the various phases of manufacturing, including the recommended methods of measurement control.

As for the face gear, you must specify wgma various tolerance requirements yourself and 390.033 them using a CMM or agma