Phosphor Bronze Custom Bush: Material Selection

[gwolf2]

I am designing some custom bushes which must be a phosphor bronze material or very similar.
I have a copy of "BS EN 12163 Copper and copper alloys — Rod for general purposes" in my hand.
The choice is bewildering.
The requirements are:

No lubrication.
Room temperature low humidity environment.
25 year life.
EN24 or similar shafts. Shaft diameter 20-50mm range
Oscilating rather than continuous rotation.
Low number of cycles (10,000-20,000 range) and very low loads during normal operation.
Occasional very high static bending loads (stick in a hole then a big transverse load on the stick)
Occasional low impact loads on the bush flat face.

Does anyone have any suggestions?

Regards,

Gwolf

 

[MikeHalloran]

Find out what alloy is actually available in the form and quantity you need.
Check its properties against your requirements.

You may also find help at copper.org. ... but the variety of alloys that exist, or has existed, is quite large. Metals stockists tend to buy just a few alloys, so it makes sense to narrow your selection to what you can get in a reasonable timeframe.

Mike Halloran
Pembroke Pines, FL, USA

 

[gwolf2]

Thanks Mike - yes I'm contacting suppliers too. I'm interested in any user experience on the forums too.

G

 

[Tmoose]

leaded bronzes usually are the ones that survive poor lubrication without galling.

For a true lube free application I'd be thinking about something like this.

http://www.fag.com/content.fag.de/e...ngs/maintenance-free_cylindrical_bushings.jsp