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A 2Nm motor M is used to drive the system through a gear drive and a chain drive. the overall reduction ratio is to be between 16:1 and 18:1, and at an output speed of 6rpm.

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  • $\begingroup$ i would like to design a gear and chain drives of this system and select the suitable ball bearings for the shaft $\endgroup$ – dumisani mthethwa Nov 12 '19 at 10:05
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    $\begingroup$ Please add a sketch that describes your mechanism and elaborate about requirements.. $\endgroup$ – Yaniv Ben David Nov 12 '19 at 10:20
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As Yaniv Ben David states this post needs some clarification. Add a sketch and some more information.

Assuming "shaft axis" is the output shaft and the transmission goes from fast at motor shaft to slow at output shaft the maximum torque is:

$ T_{out,max} = i \cdot T_{mot,max} = 32 Nm \dots 36 Nm $ for 'typical' electric motors at low speed.

Considering a rough estimate 10% losses in the drive train, this means you get approx. 29 Nm of torque on the output shaft.

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