Quote:
Originally Posted by R.C.
Adam the two common spur gear ratios are:
15:60 - 30:45
&
15:48 - 28:35
The First set of ratios is really nice for around a 4" Wheel. It allows you to get a really nice choice of reductions. We do a 14:45 with a 15:60 - 30:45 shifter set to get around 16/6 FPS. Which is really darn nice. Wanna gear faster or slower? Change the input ratio.
But the ratio above allows a really nice, compact gearbox. If you went to a smaller wheel ~3" Or so you could go to the smaller set and use the Latter ratio.
All the information above is for a 2 stage 2 speed, you can use either one if you go to the three stage. Its just more weight/money/less efficient.
If you have any questions, please post them up!
-RC
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You can use the standard AndyMark ratio of 48:15/35:28 and direct drive 4" wheels using only two gear reductions if you use 11t press-fit pinions on the CIM motors.