Thread: A question about gearbox design . .
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Unread 29-09-2003, 20:30
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Jeff Waegelin Jeff Waegelin is offline
El Jefe de 148
AKA: Midwest Refugee
FRC #0148 (Robowranglers)
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Join Date: Aug 2001
Rookie Year: 2001
Location: Greenville, TX
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Well, to answer the question for my team's gearbox (which is pretty similar to the others you see on here):

A) We used 1/4" aluminum plate for the sides of the gearbox

B) The bearings were press-fit into place. They don't take that much side-to-side strain, even in a big hit, so it's not a big deal how they're in there, if you get a tight press-fit.

C) Ours was pretty precise. We didn't have the equipment to make it onsite, as we had only a manual mill. I believe ours and the Technokats' both need CNC. I know Dave Lavery's gearbox design can be built with manual machinery, however.

D) The CIM shaft is a metric bore and key size. I believe it's 7mm. You'd need to find a gear with that size bore, or get a non-metric bore gear that's smaller, and drill a 7mm hole.
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Jeff Waegelin
Mechanical Engineer, Innovation First Labs
Lead Engineer, Team 148 - The Robowranglers