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crush tubes
JoelP - 4/6/06 at 02:36 PM

i need to make a crush tube to prevent a 10mm bolt deforming a piece of 25mm square tube. Im guessing a piece of 13mm 16g tube wont take a 10mm bolt down the middle? Does anyone have any tips? How about 13mm 20g, or maybe 19mm tube with a washer welded on each side to keep the bolt central? Might seem like a daft question, im sure i could sort it myself, but id like to see if anyone has a good solution that i might've missed.

Cheers!

FWIW, this bolt will be one of 4 holding a freelander diff in place. I like the idea of welding a 3mm washer inside as this will make it easier to remove the diff (not such a tight fit)

[Edited on 4/6/06 by JoelP]


andrew.carwithen - 4/6/06 at 02:55 PM

I had a similar problem when I was making up the cradle for my Fireblade engine.
I went along to my local B&Q superstore where they stock both M10 bolts and mild steel tube.
Picked up a bolt and went over to the tube section and went through them until I found one that the bolt fitted snugly!
HTH,

Andy.


Peteff - 4/6/06 at 03:21 PM

Use the 16g tube and run a 10mm drill through it


JoelP - 4/6/06 at 03:31 PM

Thats what i should've done pete, ive ended up just using the 19mm tube though cos i wanna get it done! Plus, it means that my holes dont need to be too accurate, as i can correct it when i put the washer on. Cheers!


02GF74 - 6/6/06 at 04:00 PM

quote:
Originally posted by andrew.carwithen
I went along to my local B&Q superstore where they stock both M10 bolts and mild steel tube.
Picked up a bolt and went over to the tube section and went through them until I found one that the bolt fitted snugly!



hey, me too - most of the tubing seems to be 1 mm wall thickness and comes in 2 mm increments so ideal for the purpose.