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Thread: How-To: Tubing Bender

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Old 09-25-2008, 01:40 PM   #21
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Hi..great tools! Could you please give the measurements in millimeter? thanks much appreciated
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Old 09-25-2008, 05:17 PM   #22
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If you wont go to the trouble of converting 17 measurements to metric you certainly wont go to the trouble of making this.
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Old 09-25-2008, 05:54 PM   #23
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Quote:
Originally Posted by dirtworkshw View Post
Hi..great tools! Could you please give the measurements in millimeter? thanks much appreciated

Pretty handy tool I use for allot of things.....Conversion Calculators
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Old 09-25-2008, 05:56 PM   #24
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Quote:
Originally Posted by dirtworkshw View Post
Hi..great tools! Could you please give the measurements in millimeter? thanks much appreciated
Thanks man but it's super easy to convert yourself, just mutilply the inch dimensions by 25.4...

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If you wont go to the trouble of converting 17 measurements to metric you certainly wont go to the trouble of making this.
...there goes that logic again...
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Old 10-12-2008, 12:35 AM   #25
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Quote:
Originally Posted by raptorman57 View Post
Pretty handy tool I use for allot of things.....Conversion Calculators
Thanks raptorman...
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Old 11-14-2008, 12:52 PM   #26
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Thanks, Mad4Rnr, for sharing your design. I may build one of these.
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Old 12-04-2008, 12:21 PM   #27
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i use my fingers brake line bends very easy... i even used a bolt in my work table...
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Old 12-04-2008, 11:16 PM   #28
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do a search at Micro Mark, thier the Harbor Frieght tool place for hobby tools.
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Old 01-06-2009, 02:02 AM   #29
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I guess that I should post the one that I made. Mine is made out of steel and I have modified the design some. I switched the placement of the static pin and the swivile pin. I also made a couple of collars that get placed on the pin attached to the handle, this allows me to bend diferent thickness of material. I can also place the collers on the static pin to get a different size radious on the same thickness of matereail.
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Old 01-06-2009, 04:47 PM   #30
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Nice job.
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Old 01-06-2009, 05:32 PM   #31
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nice bender cruiserkb, I really like the adjustible bed radius

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Old 01-06-2009, 05:52 PM   #32
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I'll take 1 please!
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Old 01-20-2010, 11:35 PM   #33
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this is sweet!! the most logical bender iv seen for small tubing im about to make my next tuber i will be making one of thees first
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Old 01-21-2010, 10:23 AM   #34
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This type of bender design can work quite well if you add grooved rollers that go over the pins. This way you can better support the tube and adjust for different bend radii that you might want. One thing to remember is that the groove in the die does not always have to be round like the tube. A square groove can work just fine as long as the bend radius in not too small. When bending large tube for 1:1 cages the basic acceptable SMALLEST standard for bend radius is 2.25 times the tube diameter. So for 3/16 tube you would get a raduis of .42 or a 180 degree bend in just under 7/8". Everybody always tries for tighter bends but I tend to stick to the 1:1 rule. You can get tighter but the tube must be fully supported by die blocks in a rotary draw bender but even that depends on tube wall thickness. I have found that as long as you stick to 2.25 or 2.5 times the tube dia I can make bends flawless every time. But then again I have a really special bender that I built. I will post a picture later to give you guys some ideas. For inspiration take a look at professional cage building tools and see what you can come up with. I recommend trick-tools.com

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Old 01-21-2010, 10:29 AM   #35
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Fastball, that's exactly what I'm concerned with. I'm going to build a bender, but while I suspect these benders would be fine for rod, I bet bending tube might be tougher without kinking it (or filling it with sand to act as a mandrel). I was thinking of getting some rollers like War Pig used to help support the tube. That being said, do you think bending rod would require a supportive die? I'm planning on 5/32" rod for my next cage.

After I design my bender in Pro/E I'll see about posting up some pics.
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Old 01-21-2010, 11:49 AM   #36
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Tommy R,

You shouldn't need any supporting die just to bend rod. The biggest tip I can make when bending rod is to get the travelling pin as close as possible to the pin that you are bending the rod around. This way you get a more precise bend and not a sharp bend followed by a slightly arcing straight section. When the travelling pin is to far away from the center pin this is often the result if the forces to make the rod bend are high enough. You can always straighten out the arcing section by hand but I like things to be precise from the start. I'm with you on not having to use sand to pack the tube, why make it more work than it has to be.

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Old 01-21-2010, 12:06 PM   #37
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Here is how I bend tube. 2.5 x dia radius, 3/16 tube, same result on mild steel, stainless, chrome moly, brass, same results every time.











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Old 01-21-2010, 12:18 PM   #38
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Very nice!! Would you be interested in making/selling a few of those pieces (or all of them)? If so, please feel free to PM me. Very interested.
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Old 01-21-2010, 02:00 PM   #39
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I use my thumbs. Works perfectly.

p!nK
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Old 01-21-2010, 03:12 PM   #40
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if I only worked in a machine shop
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