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Bending copper (bus) bar

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JOHN TIPTON

Joined: 17 Sep 2006
Posts: 239
Location: Torquay - England

Posted: Sun Aug 16, 2015 6:10 am Post subject: Bending copper (bus) bar

Hi Guys



I'll be using the almost (standard) method for connecting the battery contactor to starter contactor on a Rv9a with copper bar, also using a lighter gauge copper bar from the live feed to the ammeter shunt, this requires a bend in the copper bar: should copper bar be bent cold or with heat applied



Regards



John

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nuckolls.bob(at)aeroelect
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Posted: Sun Aug 16, 2015 8:07 am Post subject: Bending copper (bus) bar

At 09:10 AM 8/16/2015, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "JOHN TIPTON" <jmtipton(at)btopenworld.com>



 Hi Guys



 I'll be using the almost (standard) method for connecting the battery contactor to starter contactor on a Rv9a with copper bar, also using a lighter gauge copper bar from the live feed to the ammeter shunt, this requires a bend in the copper bar: should copper bar be bent cold or with heat applied 	


   What are the dimensions of the "bar"?



   I usually make such parts from 0.06 to 0.09

   material and just bend it cold over a not-sharp

   radius  . . . ~ 1/8"



   



 

   Bob . . .     [quote][b]

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stuart(at)stuarthutchison
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Posted: Sun Aug 16, 2015 8:33 am Post subject: Bending copper (bus) bar

If you bend thin material once with a blunt radius, say 1/8”, then cold is fine.  If you do more bending it will work harden and may crack under stress and vibration. In difference to steel, annealing copper is achieved by heating to cherry hot and quenching in water or oil.





 	  Quote: 	
		   On 16 Aug 2015, at 18:10, JOHN TIPTON <jmtipton(at)btopenworld.com> wrote:

 

 

 

 Hi Guys

 

 I'll be using the almost (standard) method for connecting the battery contactor to starter contactor on a Rv9a with copper bar, also using a lighter gauge copper bar from the live feed to the ammeter shunt, this requires a bend in the copper bar: should copper bar be bent cold or with heat applied

 

 Regards

 

 John

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=446020#446020

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stuart(at)stuarthutchison
Guest

Posted: Sun Aug 16, 2015 8:34 am Post subject: Bending copper (bus) bar

If you bend thin material once with a blunt radius, say 1/8â€, then cold is fine.  If you do more bending it will work harden and may crack under stress and vibration. In difference to steel, annealing copper is achieved by heating to cherry hot and quenching in water or oil.



Cheers, Stu

 	  Quote: 	
		   On 16 Aug 2015, at 18:10, JOHN TIPTON <jmtipton(at)btopenworld.com> wrote:

 

 

 

 Hi Guys

 

 I'll be using the almost (standard) method for connecting the battery contactor to starter contactor on a Rv9a with copper bar, also using a lighter gauge copper bar from the live feed to the ammeter shunt, this requires a bend in the copper bar: should copper bar be bent cold or with heat applied

 

 Regards

 

 John

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=446020#446020

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JOHN TIPTON

Joined: 17 Sep 2006
Posts: 239
Location: Torquay - England

Posted: Sun Aug 23, 2015 6:13 am Post subject: Re: Bending copper (bus) bar

The copper bar is 2mm (0.08inch) - so bend cold over a not too sharp (vice) edge 



Thanks



Bob (and all)



John

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