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Unread 06-08-2014, 08:10 AM   #1
VBJeepWJ
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Pipe Kinking in pipe bender, Tried everything

So I will start by listing the bender and pipe,
http://www.harborfreight.com/http-ww...2888-html.html

http://www.homedepot.com/p/Unbranded...BTBE/202310232

I have tried packing it with dry sand, wet sand with water, lubricating everything, but I still get one kink on the bottom side that is bad like a fold and then it rises out of the die, This starts fairly early at like 30 degrees, and even before that it doesnt look amazing. I figure I have to be doing something wrong because I have seen people use this with success. I know it doesnt give the best bends in the world, but they should still be useable and not just scrap. Any suggestions guys? Again it is just a single kink in the middle and then the pipe rises out of the die slowly.

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Unread 06-08-2014, 07:19 PM   #2
jason m
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When bending pipe with that style bender each hole represents a different size of pipe, starting from the center and working your up/out, you start with 1/2" sch40 then 3/4" and so on and so on.
So to bend 1.5" sch40 pipe you need to use the 5th hole out from the center, with the right size center shoe. Some pipe cant handle being bent, it will kink wrong or just rip open. But then some pipe will bend nice and easy, just depends on how well it was made which pipe really has no real high standard made unlike DOM.


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Unread 06-08-2014, 07:30 PM   #3
skizriz
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What Jason said.Use the proper spaced holes for the size of pipe. I use my HF pipe bender alot, and it never kinks it. I was actually surprised at how nice of bends it does. 90* with no deformation at all, no sand, no nothing.
Go to a plumbing supply house to get pipe. It's usually local made (ask them) and way better quality than the overseas made box store junk. Just looking at it you can see the better quality. Plus it's nice when it's not covered with that layer of black goop.
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Unread 06-08-2014, 08:42 PM   #4
VBJeepWJ
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Quote:
Originally Posted by jason m View Post
When bending pipe with that style bender each hole represents a different size of pipe, starting from the center and working your up/out, you start with 1/2" sch40 then 3/4" and so on and so on.
So to bend 1.5" sch40 pipe you need to use the 5th hole out from the center, with the right size center shoe. Some pipe cant handle being bent, it will kink wrong or just rip open. But then some pipe will bend nice and easy, just depends on how well it was made which pipe really has no real high standard made unlike DOM.


Jason.
I did use the bender correctly and had everything set up as you said and it still kinked it on approximately 5 or 6 bends
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Unread 06-08-2014, 09:37 PM   #5
AtTheHelm
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I was also having this problem a while back. What happened to me is the 'lips' of the die (also 1.5) spread apart so it didn't hold the pipe tight. Returned the die to HF and they replaced it. The new one they gave me has been working good. I don't use actual pipe in mine, only 'pipe size tube' from my steel supplier. It's bare uncoated tube rated for structural rather than astm pipe.

Also, if you put a couple short pcs of angle iron between the rollers and the pipe you won't get those dimples from the rollers.
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Unread 06-09-2014, 08:15 PM   #6
jason m
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Quote:
Originally Posted by VBJeepWJ View Post
I did use the bender correctly and had everything set up as you said and it still kinked it on approximately 5 or 6 bends
Try some different pipe, if your setting it up right then its the pipe you have. Trust me I have made many trips to the scrap yard with split and kinked pipe.
Then I said screw this and bought a tube bender, along with the tube bender I bought a 1.25" sch40 Die and now I can make a mandrel bend in pipe and its as clean as what the tube I bend looks like.

The kinko bender is for those people cages I don't like, lol.

Jason.
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1993 YJ 4.0 60 Front, Rear steer 60, bolth spooled, 5.38's, 700r/241 39.5 iroks and beating it like it owes me money.

And on the 8th day, God created the 14 bolt....
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Unread 09-10-2014, 02:49 PM   #7
rockymtwrangler
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if you have access to and induction heater use it to warm the pipe up a bit if not use a torch but heat the pipe evenly across the outside radius 80-100
deg Celsius is all you need, i have to do this lots to bend aluminum
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Unread 09-16-2014, 11:17 PM   #8
Bear304inc
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Can't figure what's going on with my crap phone but look up,, "charlieboy65" harbor freight pipe bender modified for bending tube"
Another one I've seen is saying to use a smaller die,, use the die closer to the id of your tube/pipe. By turf dog? , also on you tube.
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Unread 09-17-2014, 08:07 PM   #9
dwilliams35
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Where is the pipe made? Haven't done it in a while, but we used to have huge problems with chinese pipe kinking: enough that we just changed everything to spec American pipe.
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Unread 09-17-2014, 08:26 PM   #10
Bear304inc
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Quote:
Originally Posted by dwilliams35 View Post
Where is the pipe made? Haven't done it in a while, but we used to have huge problems with chinese pipe kinking: enough that we just changed everything to spec American pipe.
Not the first I've heard of this, guy I know will not buy from box stores, home depot etc, he goes to a welding supply shop. Cost more but he swears its worth saving the headache. I have had moderate luck with Chinese tube.
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Unread 10-16-2014, 12:38 AM   #11
straightsixjeep
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I have the 16 ton hf pipe bender. I've yet to bend pipe however I modded it for tube. You may want to search youtube for harbor freight bender modifications. Building a strap to retain the pipe in the center shoe may help with the kinking.
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Unread 11-07-2014, 05:19 AM   #12
Nicksan
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Have you tried bending slower?
I have the same bender and I noticed that the pipe would slip in the die sometimes.
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