NEED BUSHING WITH HIGH PV VALUE
NEED BUSHING WITH HIGH PV VALUE
(OP)
We are trying to come up with a solution to a bushing problem. We have a bushing in an reversing application where a sleeve rotates +/- 15° within a bushing continuously. The sleeve has a 2-3/4" OD for reference.
I need something that will withstand a Velocity of V=210 fpm, P= 2000 psi (force that pin puts on projected area of bushing), and a pv value around 450,000.
An initial attempt was Mag-bronze with grease. After running through these numbers I can see why it didn't work.
Mag Bronze Max P=8,000 , Max V = 100, max PV=150,000
Any ideas?
Thanks,
Schroyer
I need something that will withstand a Velocity of V=210 fpm, P= 2000 psi (force that pin puts on projected area of bushing), and a pv value around 450,000.
An initial attempt was Mag-bronze with grease. After running through these numbers I can see why it didn't work.
Mag Bronze Max P=8,000 , Max V = 100, max PV=150,000
Any ideas?
Thanks,
Schroyer





RE: NEED BUSHING WITH HIGH PV VALUE
has additional additives to
allow the greater pv value?
Is it getting too hot at those
fpm speeds.
RE: NEED BUSHING WITH HIGH PV VALUE
The bushing lasts approximately 3 months before failure.
Heating up has not been an issue.
RE: NEED BUSHING WITH HIGH PV VALUE
Seems like bronzes need a heap of lead in the recipe to survive marginal lube situations.
I seem to recall the shaft finish and hardness can help some, but establishing REAL lubrication is at least 10 X more effective than going to Rc 60 parts.
RE: NEED BUSHING WITH HIGH PV VALUE
We used this alloy in some very highly loaded applications.
This is highest lead content bronze around as recommended by Tmoose. Don't use the lack of lubrication properties, use a good lubrication system.
You will probably have to call them as their website isn't very informative. I did have some literature but it got lost.
http://www.metaltekint.com/Bearium/
RE: NEED BUSHING WITH HIGH PV VALUE
RE: NEED BUSHING WITH HIGH PV VALUE
bearing or Fluorolon 3000 (PEEK). You can acheive PV over 400,000 in both lubricated. <www.aptechno.com>
Good Luck.
RE: NEED BUSHING WITH HIGH PV VALUE
RE: NEED BUSHING WITH HIGH PV VALUE
You should always start a new thread with a new question.
You should take a look at following and give them a call.
http://www.duramax-marine.com/bearings.htm
RE: NEED BUSHING WITH HIGH PV VALUE
Here is another source of Hydro bearings. The site is a little tricky to navigate.
http://www.tenmat.com/bearings/index.html