17-08-2014, 21:36
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no bag, vex only, final destination
AKA: Pinecone
 FRC #0228 (GUS Robotics); FRC #2170 (Titanium Tomahawks) Team Role: Mentor
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Join Date: Dec 2008
Rookie Year: 2006
Location: Glastonbury, CT
Posts: 7,654
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Re: Custom RS550 Gearboxes
Check RC hobby shops and other related websites. You can find a ton of press fit 32DP pinions for these kind of motors and output shafts. Banebots also sells pinions (look in the accessories column for P60 and P80 gearboxes).
Knurling isn't required but it can make a press fit that is too loose just right. Even with a belt and pulley, a press fit is your best choice. I am always uncomfortable relying on something like a set screw to transmit torque.
One of the reasons the VP is so useful is that the included coupler eliminates the need for press fitting while providing flexibility in your gear ratio. I'm a fan of using a single stage VP as the input to a traditional spur gearbox.
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College Mentor: 2791 (2010-2015)
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