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Re: Custom gearboxes
For spacers, we use 3/4" diameter black delrin rod from McMaster. I second the recommendation to drill it to slip over the hex. We've tried broaching them in the past and the delrin springs back making a really tight fit. We've had to run the broach through 3 or more times to get them to even go on.
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Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
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