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About LinkBacksHere is a nice site for printing out tube coping patterns. If you don't have a notcher this will help you draw the coping cut path.
Tube Coping Calculator
Here is the calculator for a chop saw
Chop saw coping calculator
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Moderator
Here is a nice site for printing out tube coping patterns. If you don't have a notcher this will help you draw the coping cut path.
Tube Coping Calculator
Here is the calculator for a chop saw
Chop saw coping calculator
Last edited by Gadget; 11-28-2010 at 02:24 PM.
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Ascinder (11-08-2010)
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Oh man, you are awesome for posting this. I have been looking for something just like this. I am going to be doing a rollcage on my VehiCROSS project and this will help eliminate quite a few potential errors.
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Moderator
Glad it was helpful.
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Longevity WeldPro LS200PI (IGBT)
Force Cut LP80 plasma cutter
Longevity auto dark welding helmet
Atlas 10x36" lathe
Craftsman 5HP 30 Gal compressor
Home made CNC router/plasma cutting table powered by Longevity Force Cut LP80
Home built aluminum foundry, HF 4x6 bandsaw, O/A torch
Senior Member
Gadget this should be a sticky. I do this manually with graph paper. Thanks
Iggy
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Moderator
It is now Iggy, thanks for the suggestion.
Dan
Units owned
Longevity WeldPro LS200PI (IGBT)
Force Cut LP80 plasma cutter
Longevity auto dark welding helmet
Atlas 10x36" lathe
Craftsman 5HP 30 Gal compressor
Home made CNC router/plasma cutting table powered by Longevity Force Cut LP80
Home built aluminum foundry, HF 4x6 bandsaw, O/A torch
Senior Member
I did my four inch tubes with the plasma cutter. I drew up the notch at 90 deg by hand, then I made a template out of a four inch inside diameter pipe. Then I put some 1/4 - 20 bolts around the outside to clamp it. To use it you just line it up, then trace out the notch with the plasma cutter. I'll have to post a picture.
"Man is the best computer we can put aboard a spacecraft ... and the only one that can be mass-produced with unskilled labor"
Apollo 11 W.V. Braun
Have ForceCut80I, Precision TIG 185, Ideal Arc 250, Oxy-Acetylene, Tig welding Chamber, 14 Ton pipe bender, 20 Ton press, Electric sheet metal shear, 12 inch- 0.125 Shear, 12 inch Metal Band Saw, Power Hack Saw, Abrasive Chop Saws, 2 Mills, 5 Lathes, and lots of other items
Moderator
Sounds like this is very useful. Pictures will help.
keith
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A while ago someone posted a link to a calculator for how to make the cuts with a chop saw or something similar. This seems more accurate but slower for small stuff.
Eric
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Senior Member
The chop saw is only a close approximation. The curve is more complex and can be made with a hole saw. I made a fish-mouth jig to cut the frame rungs for my cobra frame. The jig has an inside diameter of 4 inches. I used 1/4-20 bolts to secure then trace the outline with my plasma cutter. It may be that I was just lucky, but it made a perfect fish-mouth. I made the cut about 1/16th over and just touched it with an angle grinder (almost like file to finish, but faster).
"Man is the best computer we can put aboard a spacecraft ... and the only one that can be mass-produced with unskilled labor"
Apollo 11 W.V. Braun
Have ForceCut80I, Precision TIG 185, Ideal Arc 250, Oxy-Acetylene, Tig welding Chamber, 14 Ton pipe bender, 20 Ton press, Electric sheet metal shear, 12 inch- 0.125 Shear, 12 inch Metal Band Saw, Power Hack Saw, Abrasive Chop Saws, 2 Mills, 5 Lathes, and lots of other items
Moderator
Eric,Originally Posted by matteh99
I have added the chop saw calculator to the original post.
Units owned
Longevity WeldPro LS200PI (IGBT)
Force Cut LP80 plasma cutter
Longevity auto dark welding helmet
Atlas 10x36" lathe
Craftsman 5HP 30 Gal compressor
Home made CNC router/plasma cutting table powered by Longevity Force Cut LP80
Home built aluminum foundry, HF 4x6 bandsaw, O/A torch
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