AGMA 908-B89 PDF

Single user license only. Copying and networking prohibited. The tables for geometry factors contained in this Information Sheet do not cover all tooth forms, pressure angles, and pinion and gear modifications, and are not applicable to all gear designs. However, information is also contained for determining geometry factors for other conditions and applications. It is hoped that sufficient geometry factor data is included to be of help to the majority of gear designers. Due to the number of requests for this paper, it was decided to publish the data in the form of an Information Sheet which became AGMA

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Single user license only. Copying and networking prohibited. The tables for geometry factors contained in this Information Sheet do not cover all tooth forms, pressure angles, and pinion and gear modifications, and are not applicable to all gear designs.

However, information is also contained for determining geometry factors for other conditions and applications. It is hoped that sufficient geometry factor data is included to be of help to the majority of gear designers.

Due to the number of requests for this paper, it was decided to publish the data in the form of an Information Sheet which became AGMA AGMA When AGMA The calculation procedure for I was simplified, but the end result is mathematically identical. Also, the calculation of J was modified to include shaper cutters and an equation was added for the addendum modification coefficient, x, previously undefined and all too often misunderstood.

Appendices have been added to document the historical derivation of both I and J. Because an analytical method for calculating the Bending Strength Geometry Factor, J, is now available, the layout procedure for establishing J has been eliminated from this document. All references to geometry factors for bevel gears have been removed.

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Scope thickness due to protuberance below the active profile is handled correctly by this method. The procedures in this Information Sheet de- 7 The root profiles are stepped or irregular. Strength, J. These values are then used in con- These factors may not be valid for root forms junction with the rating procedures described in which are not smooth curves. Helical Gear Teeth, for evaluating various spur 8 Where root fillets of the gear teeth are and helical gear designs produced using a generat- produced by a process other than generating.

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AGMA 908 – B89 PDF

The values were rounded to two significant figures. In order to use Section 5, xl and x2 must be determined. Urabe Tsubakimoto Chain D. Determining Coefficients Addendum Modification concentration and load location, based on the work of Dolan and Broghamer [ It is based on the method of Lewis [l] where the beam is assumed to be parabolic in shape and inscribed within the gear tooth. Bending Strength Geometry Factor, J 5. Additional information on high transverse contact ratio gears agma b89 provided agma b89 Appendix Agma b Since the boundary conditions agma b89 influence the ring-bending stresses, the method by which the internal gear is constrained must be considered.

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AGMA 908-B89-1999

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