[gburlison]

Originally Posted by Rod

Thanks
A few answers
The gears used are a 55 tooth 3/8 face 20 DP for output and a 5 tooth stem pinion on the end of the Cim motor. The stem pinion has a 3/8" Dia. so it can not be mounted on the Cim shaft. That is why the Cims use a coupling and are not face mounted. I have put 3 bearings on a shaft many times and never had a problem. Our robot this year uses the same gearboxes and works perfect. The sprockets are 14 tooth #35 with 5/8" Bore. This year we had to add weight to our robot (17 Lbs.) We have a 55 Lb. drive train this year, that does not count the arm. So next year if we have a 68 Lb. drive train it should be about right. I read these boards every day, just don't post too much. Our designs have been built, they are posted here both the CAD drawings and this year's Robot. CAD drawings are titled Light weight drive train, we built a slightly modified version of it.
See Ya

Rod,

Did you check the weight of this design in inventor?