Replacing needle bearing with a bushing
Replacing needle bearing with a bushing
(OP)
I am trying to replace a needle roller bearing (no dedicated inner and outer race per say, uses pin and outer housing for races) with a bushing. At this point I need to find a material I can machine myself to make the bushing. I have looked at Glacier Garlock LB9-machined bronze as a possible material, but the maximum dynamic load is too low 17,400 psi). I calculate the max dynamic load of my system to be 27,750 psi (1000 pounds / (0.2325" pin diameter x 0.155" pin length)).
The main reason I would like to replace the bearing is the motion on the bearing is oscillating, thus the bearing does not experience a full rotation. Thus the load side of the pin has a tendency wear. After many iterations we are still fighting material break down of the pin. The needle bearing manufactured actually suggested a bushing in this application.
So to make a long story short, can anyone tell me a direction of material selection for this problem? Thanks in advance for the help.
The main reason I would like to replace the bearing is the motion on the bearing is oscillating, thus the bearing does not experience a full rotation. Thus the load side of the pin has a tendency wear. After many iterations we are still fighting material break down of the pin. The needle bearing manufactured actually suggested a bushing in this application.
So to make a long story short, can anyone tell me a direction of material selection for this problem? Thanks in advance for the help.





RE: Replacing needle bearing with a bushing
RE: Replacing needle bearing with a bushing
RE: Replacing needle bearing with a bushing
The 0.048" roller you mean the diameter of the rollers inside the bearing?
What is the pin made off and what is it's strength/hardness?
RE: Replacing needle bearing with a bushing
What is the required life cycle of the pin-bearing couple?
RE: Replacing needle bearing with a bushing
RE: Replacing needle bearing with a bushing
RE: Replacing needle bearing with a bushing
The other thought is plate one of you members with electroles Ni and then age it to a high hardness. And plate the other componant with the bearing alloy. The thinner the bearing material the less deformation.
= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: Replacing needle bearing with a bushing
http://www.metaltekint.com/Bearium/
RE: Replacing needle bearing with a bushing
Of course it has shock loading and moves at a high rate (small oscillating motion); if it didn't my job would be no fun (insert smile). The shock loads vary in magnitude and are not easily measured or calculated, thus we have approximations of what they are. Are you concerned with the bushing getting "pounded out" (sorry for the lack of a better term)?
unclesyd,
Gave them a call and they are sending over technical specs, their website was not very technical from what I could find. Thanks for the heads up!
Thanks for all the help so far, it has got me somewhat optimistic about the feasibility of a bushing.
RE: Replacing needle bearing with a bushing
I know you mentioned that your design of a steel/steel pin/bushing is a trade secret but we would be interested in anything you could share.
thanks
RE: Replacing needle bearing with a bushing
Before I can respond to your last posting I will need to know more on your design to see if your case can be solved in a similar way. Is your case is a lug shape design. A drawing can help.
http://www.webspawner.com/users/israelkk/
RE: Replacing needle bearing with a bushing
I don't have a specific need but was just generally interested in your design i.e: selection of steel, hardness, tyoe of solid lube, etc.
My designs are mechanisms (lots of metal to metal sliding) and I am always keeping an eye out for methods (other than platings and coatings) to reduce friction and wear.
RE: Replacing needle bearing with a bushing