Tube bender

[BelgiqueB]

Bought a JD2 model 32 tube bender with a 45mm die and doing some first tries with it. Running into an issue that the tube is wrinkling on the inside of the bend, plenty of people are having nice smooth bends with these type benders so must be something i'm doing wrong, anyone have any experience/advice?

The tube i'm bending is 45 x 2 mm EN 10305-3 tube, which is according to Chatgpt is 'Cold-formed, welded precision steel tube'.

 

[Barking Mat]

Anyway you can fill it with sand ?

 

[Richiew]

45	140	180	2.4	6.35
45	165	180	2.1	6.35

The fourth column is minimum wall thickness for the 45mm die. Your tube wall thickness is below this.

Full table here.

JD Squared Model 32 Round Metric Tube Die Set

JD Squared Model 32 Round Metric Tube Die Set All die sets below fit the JD Squared Model 32 Tube Bender.If you need Imperial Tube Die Sets see the previous listing on the tube benders sub-menu.You can call us to pay by card.

stakesys.co.uk

 

[Erie Fred]

At least the wrinkles are consistent.
Have seen similar on mass produced articles.

 

[BelgiqueB]

Anyway you can fill it with sand ?

Have read about this before but is not practical for me.

 

[BelgiqueB]

45	140	180	2.4	6.35
45	165	180	2.1	6.35

The fourth column is minimum wall thickness for the 45mm die. Your tube wall thickness is below this.

Full table here.

JD Squared Model 32 Round Metric Tube Die Set

JD Squared Model 32 Round Metric Tube Die Set All die sets below fit the JD Squared Model 32 Tube Bender.If you need Imperial Tube Die Sets see the previous listing on the tube benders sub-menu.You can call us to pay by card.

stakesys.co.uk

Although my tube is only 0.1 undersize i'm also afraid that this is the case, good thing i only bought 7 6 metre lengths of this tube . Did contact the supplier in idle hope it's maybe another reason.

 

[dieselsamurai]

Ive made plenty of roll cages thin tube was always more tricky to get smooth bends on but never used that type of bender sand usually cured the issue for us

 

[Erie Fred]

Have read about this before but is not practical for me.

Why ?

 

[dobbslc]

I had this with copper pipe and found it was because I was 'helping' the tube by pulling on it. When I let the bender do the work it was fine.

 

[MetalMonkey]

You often get it on copper if you are trying to pull the bend too quickly. Don't know if that's relevant or not.

 

[Agroshield]

Why ?

Perhaps he lives too far from the sea.

Salt or rice or any granular material or wax would also do.

For small diameter tubing, there is a low melting point alloy (called Cerobend) that is used. But it would be too costly here.

 

[BelgiqueB]

Why ?

Just seems like a hassle to fill every tube/bend with sand and cap off the tube? Even more since plenty of other people do have good results with these type benders.

 

[Erie Fred]

It's the cheapest way to fix your problem.
You could buy a ball mandrel, that might fix it.
or buy a fancy powered CNC bender with tension control.

Just seems like a hassle to fill every tube/bend with sand a