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Author Topic:   tube fitting tool
Winland Racing
Dirt Maniac

Total posts: 122
posted February 01, 2005 06:51 PM  
Longacre has a tool called a pipemaster tube fitting tool, http://www.longacreracing.com/catalog/item.asp?id=587&catid=21
It is used to make an impression of the joint you are trying to fit and make it easier to transfer it to the tube.
Is this a good tool or would a notcher be a better purchase.
Looking for an easier way to fit rollbar tubing..
Please advise,
WR#66

snowman
Dirt Freak

Total posts: 241
posted February 01, 2005 08:51 PM  
My opinion, save your money.....you could buy a good hole saw type notcher for less.......

A tool that would help would be a magnetic protractor.....(available at Sears, about 12 bucks).......Hold the tube where it needs to be and place the protractor on it......it will give you the angle......

And just a bit of simple math will help....for example, Say you have one tube at 90 degrees to another and you want to add a diagonal brace.......if the brace is centered....both angles will be 45 degrees......If the brace is not centered, and the angle is 40 degrees, one notch will be 40 and the other end will be 50......

The total of the two will equal 90 degrees.......

Of course, if the two are not at 90 to each other, the total will not be 90.......but if you know how far from 90 it is (like a 10 degree layback on a hoop) you can add or subtract as needed to know the correct angle.......The point is put it in degrees and you can figure what the notch should be...........

Notcher and a protractor........Thats what I'd buy......

Good Luck,
snowman

andykmod
Dirt Freak

Total posts: 351
posted February 04, 2005 01:43 PM  
What about the electric hand held grinder and the good old eye. If it has some gaps thats what the wire feed welder is for.lol

Winland Racing
Dirt Maniac

Total posts: 122
posted February 04, 2005 04:23 PM  
I usually use a combination of eyeball,drill bit, grinder, torch, fit,fit,fit to get it to fit. Just was wondering how to make life a little easier. What about a notcher? Anybody have luck with them?
Thanks again.
WR#66

pmiracing
Dirt Full Roller

Total posts: 44
posted February 04, 2005 04:58 PM  
All you have to do is hold the tube ay the angle you want up against the tube you are going to fit it to, mark the points where the two meet, cut the long side off straight and then cut from the other mark to the center of the tube. It's hard to explain without showing you but it works great. A chop saw or carbide cutoff saw works best for this because the second cut is such a steep angle must times. I build pipe railings for a living so it comes easy for me but with a little practice you will hit it on the first try.

racingfool1
Dirt Full Roller

Total posts: 36
posted February 04, 2005 05:09 PM  
I build chassis all the time (24) last year and I only use a chop saw. The fitting tools are cool but once you do a handful you won't be using it anymore because you can eye ball what you need. For 1 3/4" tubing cut about 1/2" to 5/8" off each side of the tubing from the center. And you have a notch for a 90* joint. Add or take away on each side as needed to correct for the angle you need. Practice with cheap old exhaust tubing and within a few cuts you will have it figured out.

Kent
Dirt Maniac

Total posts: 102
posted February 07, 2005 02:48 AM  
RacingFool does the same thing I do - For a 90 I cut the tubing off 3/8" at a 45 degree angel on each side and a little touchup with the grinder and in no time at all I have a perfect gap free joint! There is no substitute for practice! I've built 2 cars now and it gets easier the more ya do it! Good Luck!

wfoondirt
Dirt Forum Champ
Total posts: 505
posted February 07, 2005 09:44 AM  
How much are you wanting to spend to do this? The quickest way i have found to do it is to make the center and the angle on the tube then use a lathe to notch it. If you can't eyeball it you can use a protractor. To do the notch I chuck an 1 1/2" mill into the lathe then feed the tube into it. Takes less than 30 sec for a perfect notch. The setup is similar to this except I use a lathe instead of a dedicated machine.

If you are triing to build a whole car the whole saw notchers are slow and tend to eat up bits unless your careful, If your on a budget and don't do alot of notches the chopsaw methods described above work better.

I know the comment was tongue and cheek but don't fill gaps with the MIG, spend the time to make them fit right.

As far as the longacre tool, save your money, its a nifty tool but with some practice your eye will make it obsolete.

edited for speeling

[This message has been edited by wfoondirt (edited February 07, 2005).]

NJantz
Dirt Forum Champ
Total posts: 755
posted February 07, 2005 10:38 AM  
I think those pipemaster fitting tools are awesome. A lot of chassis shops use them. They work real good the more complicated the angles get and the more tubes you have interesecting a common point. Your tubing will mate together with less gaps & less time when you use these things. I probably wouldn't spend the money to buy the whole kit, I'd just buy the most common size I'd plan on using.

[This message has been edited by NJantz (edited February 07, 2005).]

Winland Racing
Dirt Maniac

Total posts: 122
posted February 07, 2005 12:24 PM  
I only need to install an X on the main hoop. I usually use square stock on the round bar to get an even surface to make it easisr to fit. 90 degree fits are a lot easier the 45degree, I will be doing the 45 degree fitting.

Thanks for all the input.

WR#66

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