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 Post subject: Control Arms Tubes
PostPosted: January 30, 2018, 6:52 pm 
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Joined: December 6, 2017, 2:20 pm
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Location: San Jose, California
I'm looking at the control arms for the Locost. I have a pretty nice drill press and was wondering if I could use it to make the joining between the round tubes. I don't really want to try grind to fit. So I'm split between buying a set or making a set.


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 Post subject: Re: Control Arms Tubes
PostPosted: January 30, 2018, 7:10 pm 
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The voice of reason
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That should work. Buy a hole saw and take it slow. I did one of my control arm tubes that way the other day because I didn't want to change the hole saw on my tubing notcher. It will be harder to do angles ( need to measure them somehow ) and you need a vice to clamp the tube but it's doable.

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 Post subject: Re: Control Arms Tubes
PostPosted: January 30, 2018, 9:50 pm 
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Joined: October 19, 2009, 9:36 pm
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Location: meadview arizona
i was thinking (dangerous) that what is needed is a pedestal drill on its side and a tube notcher

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 Post subject: Re: Control Arms Tubes
PostPosted: January 30, 2018, 10:54 pm 
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Joined: July 17, 2015, 1:56 am
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Location: Morrisville, PA
Something like this. well worth the money. This one is from Eastwood.
But i strongly recommend ordering a set of hole saws with a very fine TPI. If your press doesn't have a good range of speeds you can bind it easily. WD40 while cutting helps a lot
The one in the picture was from lowes and it was trash. I bought mine from Missouri Precision Tools, Inc.
http://mo2ls.com/

https://www.eastwood.com/eastwood-tubing-notcher-and-hole-saw-kit.html

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 Post subject: Re: Control Arms Tubes
PostPosted: January 31, 2018, 1:03 am 
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Here's a good writeup on using a chop saw to notch tubing. Once you get the hang of it, it goes really quickly.
http://www.pirate4x4.com/forum/shop-too ... ics/456800
Kristian

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 Post subject: Re: Control Arms Tubes
PostPosted: January 31, 2018, 3:04 am 
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Location: BC, Canada. eh?
I bought a tube notcher, but I found the hassle in setting it up (what with the weird angles etc. we need to do) was more trouble than it was worth, IMHO. I ended up using my angry grinder & ultra-thin 4 1/2" carbide discs. After using the notcher for a couple of tubes, I found I could do just as good a job (or better) with the grinder, in about half the time - and with the grinder, there are no mistakes...open it up a little, test fit, massage it a bit more, etc., and it's perfect. Every time.

If I'd had my lathe back when I was doing this stuff, I'd probably have figured out a way to use that. 'Course, with the lathe, it's so much fun to use that even if it took longer to notch tubes, it would be more entertaining! "To the man with a hammer, everything looks like a nail..." :roll:

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 Post subject: Re: Control Arms Tubes
PostPosted: January 31, 2018, 8:54 am 
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Is this a good time to re-introduce builders to the Tube Miter program? Enter a few important parameters, print it out, wrap it around the tube and cut/grind along the lines. It really works. Google "tubemiter" for free download.

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 Post subject: Re: Control Arms Tubes
PostPosted: January 31, 2018, 2:17 pm 
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This is really nice. Thanks!

rx7locost wrote:
Is this a good time to re-introduce builders to the Tube Miter program? Enter a few important parameters, print it out, wrap it around the tube and cut/grind along the lines. It really works. Google "tubemiter" for free download.


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 Post subject: Re: Control Arms Tubes
PostPosted: January 31, 2018, 2:55 pm 
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There are a couple of versions of that program. Look for the one that plots the cut line for both the inside and outside of the tube. I think you want to cut to the inside diameter line, but you need the drawing to be the right size to wrap around the outside of the tube....

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 Post subject: Re: Control Arms Tubes
PostPosted: January 31, 2018, 5:05 pm 
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Location: Vista (north of San Diego CA)
What's wrong with grind to fit? I spent a while creating a jig to hold the bushing tubes exactly where they needed to be. Then cut the tubes close and had at it with the bench grinder. It takes no time at all to get a fit good enough for welding. I just don't see spending all that time trying to do perfect cuts. Life is too short and the road calls.


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 Post subject: Re: Control Arms Tubes
PostPosted: February 1, 2018, 8:54 am 
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Joined: September 22, 2005, 8:12 am
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Location: 4AGE in S.E. Michigan
I agree with John. Cut the approx. angle on the tube with a saw, than grind in the fish mouth.
I used a die grinder, quicker, but you could even use a rat tail file.
The fit-up does not have to be prefect for welding, it is the fixturing i.e. that hold the parts, needs to be right, and I would add, not allow any warpage during welding.
Dave W


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