by PhillipM » Tue Nov 28, 2017 4:49 pm
Whilst P-B is self lubricating it should be used with oil or grease wherever possible - you will find most commercial or industrial P-B bushes have grease grooves and injection holes.
Oilite is not the same as a plain P-B bush, it's a porous bronze sponge basically, and holds oil internally, grease will block this up, however, you can refresh them by submerging them in hot oil for 30 minutes or so.
If they are oilite and not P-B, then whoever picked those at the factory to start with needs a slap around the back of the head, Oilite shouldn't be used for bushes with tiny reciprociating movements, especially under heavy load, it's designed to work on a rotating shaft to draw the oil out and generate a working film between the surface. Terrible idea.
Phosphor Bronze plain bushes or even some split acetal or similar would have been far better, never mind the roller bearing ones.
They're pretty simple designs, it wouldn't be hard to modify them for that (or needle bearings) yourself if you have a little engineering skill and it'd be a lot cheaper than the factory option.
Whilst P-B is self lubricating it should be used with oil or grease wherever possible - you will find most commercial or industrial P-B bushes have grease grooves and injection holes.
Oilite is not the same as a plain P-B bush, it's a porous bronze sponge basically, and holds oil internally, grease will block this up, however, you can refresh them by submerging them in hot oil for 30 minutes or so.
If they are oilite and not P-B, then whoever picked those at the factory to start with needs a slap around the back of the head, Oilite shouldn't be used for bushes with tiny reciprociating movements, especially under heavy load, it's designed to work on a rotating shaft to draw the oil out and generate a working film between the surface. Terrible idea.
Phosphor Bronze plain bushes or even some split acetal or similar would have been far better, never mind the roller bearing ones.
They're pretty simple designs, it wouldn't be hard to modify them for that (or needle bearings) yourself if you have a little engineering skill and it'd be a lot cheaper than the factory option.