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+--- Thread: Bent radius arm (/showthread.php?tid=5819)
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Bent radius arm - darcher121 - 18-03-2021
There is a definite kink in the n/s radius arm.
Can this be straightened without weakening it?
RE: Bent radius arm - Robert Leigh - 18-03-2021
I have straightened an arm like that successfully. You must be careful that the top and bottom 'sides' of the square U-section do not kink. I used a 20 ton hydraulic press which allowed me to be very gentle, and is the method I recommend.
RE: Bent radius arm - darcher121 - 18-03-2021
I’m glad it can be fixed.
Would I do it cold or use some heat also?
What is it made of, pressed mild steel?
RE: Bent radius arm - Bob Culver - 19-03-2021
Arms are very common. make sure obttin the correct side.As a temporary repair could straighten with a block of wood inserted and a club hammer, heavy axe head etc. If have a secure lintel can often jack against even with a screw jack..
RE: Bent radius arm - Parazine - 19-03-2021
(18-03-2021, 11:59 PM)darcher121 Wrote: Would I do it cold or use some heat also?
What is it made of, pressed mild steel?
Best done cold on a press (another excuse for having a press in the workshop!).
Made from heat treated, high quality alloy steel.
Alternatively, there are many second-hand examples about, would be quicker and easier to find a replacement.
RE: Bent radius arm - Howard Wright - 19-03-2021
Hi
If you do manage to find a replacement (I had difficulty sourcing two recently) check it is the right one as they are handed AND that the thread on the axle end is good. They are often clouted with a lump hammer to remove them from the axle
.Cheers
Howard
RE: Bent radius arm - Robert Leigh - 19-03-2021
Agreed; I did mine cold, and its still in use without further poroblem.
RE: Bent radius arm - Tony Betts - 19-03-2021
im not sure when the last time you boys tried to buy early radius arms.
but.
GOOD replacements are extreamly rear. the key word "GOOD"
bent ones, very common.
cracked across the rivets, very common.
threads damaged, very common.
wear from loose waisted bolt, very common.
RE: Bent radius arm - Bob Culver - 20-03-2021
A firm familiar with crash repairs or a generally handy engineer would sort it very quickly. A with all such work streching of the metal as by hammering on a hard surface must be kept to a minimum. However Almost inevitable to acquire a kink in the stretched flange but a slot can be cut tclosed up and MIG welded. Leaves part less soft than traditonal shrinking. Persuading such parts back to shape is quite satisfying.
RE: Bent radius arm - Dave Mann - 20-03-2021