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Unread 16-11-2016, 22:33
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hectorcastillo hectorcastillo is offline
Former Driver and Team Captain
FRC #3481 (Bronc Botz)
Team Role: College Student
 
Join Date: Apr 2013
Rookie Year: 2011
Location: Cambridge, MA
Posts: 139
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Re: Polycord Pulleys

Quote:
Originally Posted by TheRozb View Post
Hey Everyone,

Where do you source your polycord pulleys? We need some that will go onto 1/2 inch hexshaft. Do you just make your own in house? I've done some Google searches but not much luck...

Thanks
We primarily used aluminum tubing with hex shaft caps pressed into the ends and gum rubber wrapped around the outside. You can wrap the gum rubber around a couple times to get your desired diameter. Make sure to put a hex shaft through both caps while you press the second one in so that they are properly aligned. We used super glue for the gum rubber, and it held well throughout the season. You can also press bearings into the ends if you want a free-spinning roller. All you need machine-wise is a band saw and an arbor press or shop press.

Aluminum Tubing: https://www.mcmaster.com/#89965k741/=152mo6j
Hex Shaft End Caps: https://www.competitionrobotparts.co...oller-end-cap/
Gum Rubber: https://www.mcmaster.com/#93625k158/=152mt6p


We also use small BaneBots wheels partly because they were just lying around in our shop, but mostly because they gave us the right diameter we needed.

BaneBots Wheels: http://www.banebots.com/category/T40P.html

Here's are some pictures of our robot that show our intake and indexer. Hope this helped.

https://drive.google.com/open?id=0B7...Hp2ZFczM0p2UU0
https://drive.google.com/open?id=0B7...mt6OElubzc3X0U
https://drive.google.com/open?id=0B7...lhrUGJiekFFdWc
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365 The Decontaminators (FLL) 2011 - 2012
3481 The Bronc Botz (FRC) 2012 - Present
6221 Panther Bots Alpha (FTC) 2012 - 2016

As a FIRST Alum, it's nice to be able to eat dinner again. That is, until I get off the meal plan and have to start feeding myself.

Last edited by hectorcastillo : 16-11-2016 at 22:35.
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