AGMA 915 PDF

It is necessary to qualify some deviations with an algebraic sign. A deviation is positive when e. Certain elements may not significantly influence the function of the gear under consideration. Some measurements can be substituted for others. Stable manufacturing processes allow a relatively small number of samples to be measured and still ensure that the required quality level is maintained. It is recommended that specific measuring plans be negotiated between purchaser and supplier.

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Copying and networking prohibited. This supplement provides tables of tolerances for all the different gear accuracy grades. The range of gear sizes covered by the standard is generally shown in the tables.

The tolerances are calculated at convenient combinations of module and tolerance diameter, dT. The tables are limited to the range of 5 to teeth, using the simple spur gear relationship that tolerance diameter is approximately equal to the number of teeth times the module. The tolerance diameter of helical gears may be significantly higher. Some combinations of module and diameter or facewidth that are beyond the range shown in these tables may be valid. The tables with inch units cover a slightly narrower range than those given in the metric tables.

The diameter of 98 inches is used because the composite tolerances are limited to a tolerance diameter of mm Suggestions for improvement of this information sheet will be welcome. Profile Engineering, Inc. The Falk Corporation J. Gear Metrology, Inc. The Gleason Works B.

ZF Industries T. Xtek, Incorporated D. Gear Engineers, Inc. The Gleason Works R. Caterpillar, Inc. Arrow Gear Company J. Atlas Copco Comptec, Inc. Milwaukee Gear L. Consultant I. Consultant R. The Falk Corporation W. Mitsubishi Gear Tech. Center M. Gear Motions, Inc. Penn State University D. Hamilton Sundstrand Aero. Considine Associates D. Northwest Gears, Inc. Considine Associates P. Eaton Corporation W. Sundstrand Corporation M. Process Equipment Company M.

Amarillo Gear Company B. Mahr Corporation S. Centre Technique Des Ind. R7 Group T. Nippon Gear Company, Ltd. Gear Products, Inc. Fairfield Manufacturing Co. Eastman Kodak Company J. Regal--Beloit Corporation H. NIST R. The Gear Works -- Seattle, Inc. Xtek, Incorporated V. Brad Foote Gear Works, Inc. Consultant D. Precision Gear Company J. Consultant T. Liebherr R. Arrow Gear Company D.

Forest City Gear Company J. Columbia Gear Corporation P. At the time of publication, the editions indicated were Accuracy Classification valid. All standards are subject to revision, and parties to agreements based on this document are System -- Tangential encouraged to investigate the possibility of applying the most recent editions of the standards indicated. While the tables terms given in ISO , International gear may be used to estimate the tolerances, the actual notation -- Symbols for geometrical data.

See table tolerance should be calculated and rounded accord- 1. The user A01, Accuracy Classification System -- should not assume that familiar symbols can be used Tangential Measurements for Cylindrical Gears.

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