Bending conduit…A bit different

[Knobhead]

Not a job of mine but was asked about making a frame out of 25mm conduit. Not a single wire involved in this project.

What ID radius can you bend 25mm 180° to using a standard Hilmore bender?

Nothing to do with sledges or anything along those lines.

 

[johnboy6083]

It will be 2.5 x the conduit diameter. So 50mm for M20 conduit, 67.5 for M25, and 80mm for M32

 

[benji]

surely size of former will dictate radius

 

[mogga]

thats what tony seems to be asking benji anyone with a Hilmore bender measure the ID

 

[Knobhead]

I don't have access to a Hilmore now otherwise the tape measure would have been the first port of call.

If needs be I'll just nip in to hire station or where ever and measure a former. As I say it's not for me, but I'll be doing the drawings for it.

 

[ian.settle1]

Use a block of wood you get a tighter bend.

 

[ackbarthestar]

A slight deviation....
Dropping switch lines in cavity walls often meant that the standard 90deg bend with a 20mm former would not allow a coupler on the end with a m/c flush fitting switch box, so we used a 16mm former on 20mm pipe. Worked every time.

 

[Knobhead]

My mate and I would like this to look professional, not a wrinkled mess.
This is going to be on display so has to look just right. We can work the dimensions of the finished piece around whatever the bend radius is.

We did look at using hydraulic pipe and use a hydraulic pipe bender but the end result would be to heavy.

 

[Silly Sausage]

Just a thought...
Would heating the pipe up to a slight glow, with a pipe spring inside stop it crinkling?
I can just imagine the spring being permanently trapped inside though.

 

[Knobhead]

I give up!

I’ll just go to the hire shop and measure one! It won’t be as accurate as I want because of the natural spring back in the conduit.

I don’t want to find the tightest bend. I want a nice regular bend that can be reproduced time and time again.

 

[Silly Sausage]

I give up!

I’ll just go to the hire shop and measure one! It won’t be as accurate as I want because of the natural spring back in the conduit.

I don’t want to find the tightest bend. I want a nice regular bend that can be reproduced time and time again.

Calm down dear!

Have you tried asking on the plumbers forum...

 

[Knobhead]

Plumbers forum? For conduit!

Please Archie it's a serious question. We'll only get one bend out of one length. I suggested conduit for lightness which my mate is well up for. It's got to look solid, but strong and be light at the same time.

 

[alarm man]

Plumbers forum? For conduit!

Please Archie it's a serious question. We'll only get one bend out of one length. I suggested conduit for lightness which my mate is well up for. It's got to look solid, but strong and be light at the same time.

what is this project tony,sounds interesting

 

[spark 68]

I have measured the former on mine, but mine has only the 25mm former, is this any use ?

Outside Dia = 220mm,

I will go and measure the I/S dia.

I/s Dia = 170mm, lol.

 

[Silly Sausage]

Plumbers forum? For conduit!

Please Archie it's a serious question. We'll only get one bend out of one length. I suggested conduit for lightness which my mate is well up for. It's got to look solid, but be strong and be light at the same time.

Just slinging some ideas into the mix. Obviously no use. Never mind.
Sounds like a serious/pro job. You'd be better off getting professional advice somewhere else.