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DIY tube straightner

Drill it, tap it, weld it, screw it

DIY tube straightner

Postby Pricey » Thu Aug 05, 2010 10:40 pm

After getting fed up of trying to straighten tube for doing the builds, and looking for straight lengths which no-one stocks in Sydney, i made my own tube straightener 8-) .

I used 75mm x 25mm RHS for the bottom half so it could be mounted in a vice, and 25mm x 25mm RHS for the top half.

The rollers i've used are from Bunnings, they're sliding door rollers, which were which bolt to the underside of doors. These were $17 each and come with brackets but knocked out the pins and used the rollers only.
Bought some bolts that was a good fit inside the bearing, and used M8x50mm bolts to secure the top and bottom half and drilled and tapped the lower half so i could adjust the height so i can straighten differant sizes.

Total cost = Roughly $100, but works very well, and if you do quie a bit of tube work, it'll save you hours of time straightening the tube.

Cheers Pricey 8-)
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Re: DIY tube straightner

Postby Aussie made » Fri Aug 06, 2010 8:13 am

nice idea mate :handgestures-thumbup: :handgestures-thumbup:
I have been trying to think of something like this for a while now myself.
u have saved me hrs already :D
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Re: DIY tube straightner

Postby steve » Sat Aug 07, 2010 12:38 pm

great idea !
i will copy that, straighten tube is a pain .
so do you draw it through or push? and is it straight straight or almost
cheers
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Re: DIY tube straightner

Postby Pricey » Sat Aug 07, 2010 4:32 pm

Steve, it bloody straight hey. No way could you get it that straight by hitting the tube with a soft face mallet on the concrete floor, or however you straighten the tube. . . . . . . . .
I push it back and forth through the straightener half a dozen times, rotating the tube slightly to get all the bends out. Worth it's wait in gold for sure. It's dead straight :D and it does the 3/16" tube and 1/4" no probs at all.
I buy 10m of tube at a time, and within 10mins, i had 10m of dead straight tube cut into 500mm lengths ready for some serious tube sessions 8-)
I actually had a feeling you might like that, as you do your fair share of tube work :lol:
If you want, i could post up the part number and packet of the door roller assembly i used?

Cheers Pricey 8-)
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Re: DIY tube straightner

Postby steve » Sat Aug 07, 2010 4:55 pm

yes that would be good.
those bearings look perfect for the job
its allways botherd me as to the straightness of tube but did not think of a solution like that.
cheers.
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Re: DIY tube straightner

Postby guerd87 » Sat Aug 07, 2010 5:50 pm

Great idea. Remove the 2 right hand side wheels and crank down the bolts to make some nice large radius curves aswell, if you ever needed any :)
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Re: DIY tube straightner

Postby Pricey » Sat Aug 07, 2010 6:36 pm

This is the packet the assembly come in.

I knocked out the splined pin out, comes out pretty easily.

Just take the roller to a nut/bolt supplier and get some bolts to fit good through the pulley as you want minimal movement of those rollers. Obviously take care in marking and drilling the holes for the roller, if one roller is out of line it wont straighten properly. Measure twice, drill once :wink: :lol:
I put a thick washer behind the rollers just to space it out a little from the steel frame.

I bought some 5mm threadbar (as its very close to the OD of the 3/16" braketube) to set the height of the upper rollers. Doesn't need to be tight, just a little resistance to pull the threadbar through. Too tight and it will put a curve on the tube, so eventually i'll make some spacers so i know i've got the right height for the differant size tube.

Cheers Pricey 8-)
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Re: DIY tube straightner

Postby cliff » Mon Oct 18, 2010 4:04 pm

I like it so...................I stole your idea. Mines not as flash as yours and I need to sort out some metal rollers too. But I love not having to bash it with a hammer!!! :banana-dreads:

Heres my take on your awesome idea.

Image

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Re: DIY tube straightner

Postby Tzi » Mon Oct 18, 2010 9:54 pm

Awesome idea! I might make one myself.
Last time I just bought straight stuff from a place that does hotrod brakes... Mmmm chrome :D
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Re: DIY tube straightner

Postby some_guy » Mon Oct 18, 2010 11:02 pm

i probably should make one too

beats my method of straightening it in my hands by eye (comes out fairly straight usually)
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Re: DIY tube straightner

Postby cliff » Tue Oct 19, 2010 10:28 pm

Here is the other topic that I have pics of the line after its been through my straightener. Once I get some metal rollers I think it will be even better.

viewtopic.php?f=27&t=7610
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Re: DIY tube straightner

Postby sierrajim » Tue May 21, 2013 12:18 am

Bump for Pozzy
Wanted - spare time.
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Re: DIY tube straightner

Postby pozman » Tue May 21, 2013 8:55 am

Cheers mate.


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Re: DIY tube straightner

Postby Dattomq » Tue May 21, 2013 11:25 am

Top idea pricey!
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Re: DIY tube straightner

Postby Pricey » Wed May 22, 2013 4:19 pm

That thing is probably the most valuable item I have!
2010? Jeez it has done some work since then!
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