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Re: pic: Single Speed Gearbox Iterations
Quote:
Originally Posted by rcmolloy
..., wouldn't it be possible to have a press fit of x OD and .75 ID to fit over the CIM that would allow the possibility to help guide into larger sized holes?
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You probably have noticed plastic guides on FP motors in the FRC Kit of Parts. (shown here, for example) They are used in exactly the way you described. Of course as Chris just pointed out, the reason for using a pinion larger than the motor's metal pilot feature is not to enable a larger gear-down ratio. It is to enable a larger pinion pitch diameter. This will reduce the stress at that gear mesh, increasing the service life of the (plastic) gear which mates with the pinion.
__________________
Richard Wallace
Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
 since 2003
I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
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So go out and learn something new, even if it is old. Co-operate in this and you'll get much more out of it. Cheat and you are only cheating yourself. - ChrisH [more] 
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