Technical & Reference Section > Tech and Restoration

I need some one to shorten a frame

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steve:
i have a frame that needs to be cut about and made smaller
-can anyone on here do it?
-where would i go

ORB:
blimey, i can tell you now, it would be about 100% cheaper to buy a different frame

steve:
i can't get one in extra extra extra extra small
-its a chromo robinson,
-i have a mig welder, i might have to do it myself
-i can tack it up and ride it/check it
-wanted some nice welding,thats all
-if you imagine i have a junior with a 18 inch head tube running 451mm wheels
-i want to get the head tube to 14
cut the seat pin tube under where the frame is now, and bring the rear triangle in a few inches
-this will be easy to do as its a loop tail
-its just my welding skills are pap
-although i could file them smooth?
-oh ps i am running inch rims at 406mm with recumbant skinny tyres
 :D

-they boys got a brand new bmx but its still too snall

plus i can then whack some from the head tube, to get the rise down

fuzzynod:

--- Quote from: steve on November 14, 2005, 11:38 PM ---
-its a chromo robinson,
-i have a mig welder, i might have to do it myself
 just my welding skills are pap

--- Quote ---
Hey Steve please dont use a mig welder on Chrome- moly tubing it puts far to much heat into the material and destroys the very properties that make it desirable it will make the joint weak and brittle. The proper way and the only way we accept on the drag race cars we inspect is to TIG weld 4130.Puts a lot less heat into the material and a stronger neater weld.
Sorry to pee on your fireworks but it is a safety issue. ;)
--- End quote ---

--- End quote ---

steve:
s, where do i send you the frame, with the full size drawing, have you got a one inch die o tap the forks a bit?

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