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Re: T-slot nuts
We've used carraige bolts quite effectively as well. A few tips:
1) We got ours from Lowe's. Home Depot carraige bolts did not work for us. (I think the square at the top is larger at HD.)
2) Bring a piece of your extrusion (typically 1010) with you to the store. Test them out on the extrusion. For us, about 70% will fit.
3) Minor differences in sides of the extrusion may allow carraige bolt to work on one side, but not the others. Typically, it might work on two opposing sides (A and C) but not the other two (B and D). (Label sides ABCD, going around extrusion.) Extrusions are supposed to be identical on all four sides, they look identical, they are not quite identical. If you have a carraige bolt like this, grind off a bit of the top. (Make two flat sides on the bolt top, so the bolt fits easily. Maybe a good idea to grind all of your bolts a bit, if you have the time.
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Jim Grove, Mentor
firebirds1915.blogspot.com
(2007-2017) 1915, McKinley Tech HS, Washington, DC
(2009) 2932, Mid-Pac Institute, Honolulu, HI (Rookie Season)
(2011) 2425, Hillsborough HS, Tampa, FL
(2013-2015) 4464, College Park, MD, 2013 Rookie All Star Winner and 2014 Regional Champions, Washington, DC
FIRST is not rocket science. But it is like drinking from a fire hose.
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