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Differences Among Gear Rating Standards for Reducers
Although the two commonly used gear rating standards share certain similarities, their methodologies were developed in fundamentally different ways, resulting in divergent capacity ratings.
AGMA 2101 was developed as a design tool. Its calculation results determine the amount of torque that can be applied to gear teeth before tooth failure occurs. Much of AGMA 2101’s development is based on empirical work, intended for use across a wide range of gear designs. The gear rating standard AGMA 2101 evolved from the methodology first published by AGMA in 1946. Typically, the calculations are simplified and analytical, making them easy to apply.
ISO 6336, first published in 1996, is a tool used to evaluate existing designs. The calculations under ISO 6336 yield a safety factor that compares the allowable stress on gear teeth with the applied stress. ISO 6336 was developed based on the German rating standard DIN 3990. Its complex and detailed methodology originates from laboratory testing conducted at universities. Various approaches can be employed to account for influencing factors, such as 3D simulation, analytical methods, or graphical techniques. Compared to AGMA 2101, ISO 6336 typically considers a broader range of influencing factors; for instance, lubricant viscosity may be taken into account in macroscopic pitting assessments.
Although the two gear rating standards differ, it is not appropriate to claim that one method is more accurate than the other. Both provide valid considerations for assessing the mechanical strength of gear teeth.
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Shenzhen Jier Transmission Equipment Co., Ltd. is a high-tech enterprise that has been focusing on the sales, maintenance, and technical services of reducers for more than ten years. It is the core agent of world-renowned brands such as SEW reducers, NORD reducers, Bauer reducers, and Baumer sensors in Switzerland in Germany
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