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Unread 16-01-2017, 17:25
Karibou Karibou is offline
Steel is love. Steel is life.
AKA: Kara Bakowski
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Re: FRC Bearing Load Ratings (Climber Winch)

Quote:
Originally Posted by MrForbes View Post
The idea of using 1/2" shaft to support a winch drum to lift over 100 lbs, sounds a bit crazy to me.
We did it last year. 1/2" aluminum hex shaft (not sure what alloy, just whatever was laying around), connected to the frame by 4 bearings in VEX brackets (two on each side of the robot). Granted, the winch spools (one on each side of the robot) holding the load were sandwiched pretty closely between the bearings so they were well-supported.

We did bend a shaft during prototyping when we tried lifting using one spool in the center of the base we were using (which was probably about 28" wide) with the shaft only being supported on the ends by bearings. Still no damage to the bearings, but the shaft was definitely shot.
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Kara Bakowski
Michigan Technological University///Materials Science and Engineering '15///Go Huskies! #tenacity
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FRC 341 (2016-present): Mechanical/build mentor
Volunteer (2010-present): MAR Seneca '17, FTC Hat Tricks Qualifier '16, Brunswick Eruption '16, MAR Montgomery '16, MAR Westtown '16 Portcullis Victim, MAR Springside-Chestnut Hill '16, Ramp Riot '15 '16, FiM Escanaba District '14 '15, MidKnight Mayhem '13 '15 '16, FiM Detroit District '13, IRI '10 '12, FiM Waterford District '11 '12, MARC '12, CMP Galileo '11
FRC 1189 (2008-2011): Team Captain, Pit Crew, Website group leader, Team Education group leader, Proud Alum. We've got spirit, yes we do...


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