Framebuilders - Frame Jig
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07-16-11, 12:25 AM
How easy or hard is it to make a frame jig? What are the major components?
Photos or Websites welcome.
I have plenty of wood/lumbar and a machine shop at my disposal.
07-16-11, 08:27 AM
the best source of reasonably affordable frame jigs is instructables.com (http://www.instructables.com/id/Almost-jigless-bicycle-frame-building/)
There are other designs (http://www.instructables.com/member/drwelby/) by the same person that designed the jig in the link
Anyone know if it's possible (or advisable) to use something like the Bringheli frame alignment table (http://www.bringheli.com/components2.html) for tacking up the main triangle? I feel like it would allow me to tack the downtube properly aligned, then tack the seat tube, and from there I could extrapolate a properly aligned head and top tube? At $800 it's less expensive than all of the other commercial options I've seen...
07-17-11, 11:29 PM
yes, people use alignment tables to tack the frame together. You would need some fixturing. Alex Meade (http://www.alexmeade.com/Tools.htm) makes some frame blocks that would work
07-18-11, 09:15 AM
My old frame builder doesnt use a jig but what he did was put the frame in the table and start aligning the frame before and after brazing.
With the fork the same thing.
07-18-11, 12:13 PM
If the frame is a one-off, an inexpensive jig can be made of 3/4" plywood and V blocks. I believe this jig was originally posted by Glenn Thompson of Daltex Custom Bicycles (http://www.ridedaltex.com/) in Dallas years before he became a professional framebuilder. I saved the photos years ago from a post of his thinking I might try using something like this (long before buying my Bringheli jig). You have to be careful with the torch; plywood burns. ;)
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