aerosam
|
| posted on 23/4/09 at 08:37 PM |
|
|
how do you calculate rollover bar bends?
Having looked around for a roll hoop, I simply cant find one to fit my +4" chassis. Closest thing I could find was from GBS/robin hood/kit parts
direct who offered to cut a standard one and weld an extra 4" into the middle. But I'd rather have the whole thing made from seamless tube
TBH.
So I'm going to have to make my own. I know the distance between centres has to be 42" to fit centrally on my suspension mounts, but does
the tube shorten when you bend it? how do you work out where to accurately place the bends?
I guess I'm after an idiots guide really!
Had enough of this dictatorship known as LCB. Gone elsewhere, not coming back. Kiss my ass ChrisW.
|
|
|
|
|
minitici
|
| posted on 23/4/09 at 08:44 PM |
|
|
Performance & Protection will make you a bar.
Just send them the dimensions....
Linky
[Edited on 23/4/09 by minitici]
|
|
|
nitram38
|
| posted on 23/4/09 at 08:44 PM |
|
|
All benders differ in that they gain or lose as you bend. The only way to find out is to mark a tube, bend it and recheck the gain/loss etc.
Once you know this, you can add or subtract this measurement from future bends
|
|
|
wam builder
|
| posted on 23/4/09 at 10:34 PM |
|
|
Bends on roll bar
Really easy one mate! just make a template ie draw the thing out on a bit of plywood or cardboard, then bend one of the required angles. Mark the
start point on the curve of the tube against the corresponding start point on the guide of the bender, then lay the tubing back down on top of the
template and mark the required start point on the opposite corner still to be bent. This is the easy way, just remember to use a piece of tubing much
longer than that which you require as it is much easier to start a bit in from the end and re-cut both ends to the required length thus fixing the
height to something that pleases once the whole thing is fabbed up. Another tip is that a complete 90 may kink on the inside and flatten slightly on
the outer dependant on the former used. So I now make rollover bars ALA westfield ie with a small bend midway up "12 degree bend" this
then reduces the larger bend from 90 down to 78 and it makes the bar look less agri effect.
|
|
|
welderman
|
| posted on 23/4/09 at 11:22 PM |
|
|
if your strugglin mate could knock one up for you and poss send it by tnt.
Joe
Thank's, Joe 
I don't stalk people
http://www.locostbuilders.co.uk/forum/23/viewthread.php?tid=172301
Back on with the Fisher Fury R1
|
|
|
Peteff
|
| posted on 24/4/09 at 09:10 AM |
|
|
Have a look on jd2.com
They have some free software for the job. Link
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
|
|
|
James
|
| posted on 24/4/09 at 11:08 AM |
|
|
Martin Keenan did mine for me.
Cheers,
James
------------------------------------------------------------------------------------------------------------
"The fight is won or lost far away from witnesses, behind the lines, in the gym and out there on the road, long before I dance under those lights."
- Muhammad Ali
|
|
|
aerosam
|
| posted on 25/4/09 at 05:33 AM |
|
|
quote:
Originally posted by welderman
if your strugglin mate could knock one up for you and poss send it by tnt.
Joe
U2U sent, thanks!
Had enough of this dictatorship known as LCB. Gone elsewhere, not coming back. Kiss my ass ChrisW.
|
|
|
