Thread: My frame broke.
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Old 06-30-2009, 10:35 PM
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a_dam a_dam is offline
Motorized Bicycle Elite Member
Join Date: Feb 2009
Location: Momence, IL
Posts: 349
Default Re: My frame broke.

Pic 3: Spacer out. The 3/8 inch threaded pivot rod passes horizontally through mount. I didn't want the steel rod to wear out the aluminum and get sloppy so steel sleaves (spacers) are used; 1/2 OD, 3/8 ID. They'll be J.B welded in. (Never used JB weld in my motorized bicycle before, but it seems to be a popular item)

Pic 4: Spacer in. As Ace Ventura would say; "LLLike a glove!"

Pic 5: Clamped. Skip forward quite a bit. Block has been "split" on band saw to clamp around seat stays. Spacers epoxied in. I let them extrude beyond the edge of the aluminum the thickness of a washer, for better side wear. Then the mount block was drilled and tapped so there are 4 allen-head bolts clamping it to the seat stays with a layer of inner tube rubber for damping.
Attached Images
File Type: jpg spacer out.jpg (68.2 KB, 32 views)
File Type: jpg spacer in.jpg (63.9 KB, 37 views)
File Type: jpg clamped.jpg (81.8 KB, 70 views)
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