MadModder

Gallery, Projects and General => How do I?? => Topic started by: Bluechip on August 15, 2011, 03:42:33 PM

Title: Copper Tube Bending
Post by: Bluechip on August 15, 2011, 03:42:33 PM

Hi Troops

Just sorting out my home brew tube bender.

Few tweaks to do, but ....

Is there any laid down info re: Tube OD; Tube SWG ( AWG ); and minimum bend radius ??

Pic is of 5/16" OD x 18 SWG annealed copper tube.

It is 0.310" OD measured and the tube bend is 'flattened' to 0.316".
This is with a bend radius of 0.687".
ie the "U" bit is a 1 3/8" half circle. Or, at least the middle of the tube is ...

All sorts of stuff re: boiler tube dimensions, WP etc. but nowt about bend radii acceptable ??

Any pointers from the boiler geezers ??

Dave BC

 

Title: Re: Copper Tube Bending
Post by: Bernd on August 16, 2011, 09:48:26 AM

Try looking HERE (http://www.hinesbending.com/BASICTUBEBENDINGGUIDE.pdf) Might help.

Bernd

Title: Re: Copper Tube Bending
Post by: Bluechip on August 16, 2011, 03:39:01 PM

Hi Bernd

Thanks for the link ..

Some very interesting info. on there.

One bit seems to explain why my tube tends to 'creep' a small distance in the direction of the bend.

BC

Title: Re: Copper Tube Bending
Post by: dsquire on August 16, 2011, 04:59:48 PM

Quote from: Bernd on August 16, 2011, 09:48:26 AM

Try looking HERE (http://www.hinesbending.com/BASICTUBEBENDINGGUIDE.pdf) Might help.

Bernd

Bernd

Lot of good information on bending in there. I'll file that one away. Thanks  :ddb:

Cheers  :beer:

Don

Title: Re: Copper Tube Bending
Post by: Bernd on August 16, 2011, 07:40:55 PM

Quote from: dsquire on August 16, 2011, 04:59:48 PM

Quote from: Bernd on August 16, 2011, 09:48:26 AM

Try looking HERE (http://www.hinesbending.com/BASICTUBEBENDINGGUIDE.pdf) Might help.

Bernd

Bernd

Lot of good information on bending in there. I'll file that one away. Thanks  :ddb:

Cheers  :beer:

Don

Hey I do surprise myself sometimes on finding good tid-bits like this.  :D  Google is my freind, sometimes.

Bernd