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Old 09-28-2017, 02:22 PM   #17
Rufus
Guru
 
City: Great Lakes
Vessel Model: OA 440
Join Date: Aug 2017
Posts: 904
Quote:
Originally Posted by DHeckrotte View Post
Done!

I considered all sorts of ideas but ended up brazing the broken frame back together, replacing the axles with 316 Stainless Steel and the wheels with PTFE (generic Teflon). The original axle measured 5/32 in dia., about the same as 4 MM OD. I slipped them into 6 MM OD tubing (ID is 4 MM) to give more bearing area for the PTFE wheel. I riveted the wheel-axle assemblies back into the brass frames. McMaster-Carr for the materials.


DHeckrotte,

Does that PTFE "tube" come with the center hole already bored? Looks like a good solution.

By the way, the lower tracks that I had cut from a sheet of UHMW have both cracked again around the mounting screws after a few years. I found this stainless steel cap that I'm going to try as a fix (along with roller repair). SS914 - CRL Stainless Steel 3/8" U-Channel

Plan is to simply glue them over the plastic track with a screw at either end. Cheap fix (for the track) if it works.


Thanks
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