Engineering - simple bearing

[Munroast]

I am making a simple bearing for a handle - if I put a couple of little grooves in as per my example. would this help keep grease from squeezing out of the ends ? or would it be better off without the grooves.

this will be the centre pivit for a handle to turn on (close running fit)

it will be 10mm dia and the grooves 0.6mm deep!

 

[carmanmemoranda]

Put o rings in the grooves and grease in between ?

 

[Burnerman]

The grooves will help retain the grease - most of it will be pushed out without them, and a spiral could be better.
Have you come across a material called Oilite? It’s a porous bronze that holds oil.
John

 

[Munroast]

Put o rings in the grooves and grease in between ?

it is a pivot point so I doubt O rings would work

The grooves will help retain the grease - most of it will be pushed out without them, and a spiral could be better.
Have you come across a material called Oilite? It’s a porous bronze that holds oil.
John

Never heard of Olite, but have seen plenty of brass type bushes, may be they were Olite.

By a spiral do you mean

I doubt I have the know-how to machine that in (but it would be fun learning), could even do a left hand spiral too, would create a type of frosting!

what depth would the groove be, 0.25mm ?

none of this is really necessary (it will hardly get used and last for about ever dry) but I just like playing and learning.

 

[Burnerman]

Oilite is a curious material made from either sintered brass or bronze - the sintering process means that oil or light grease can actually percolate through it.....it turns well too and is a perfect material for bushes.
The spiral will absorb lubricant well, and if your lathe has a thread cutting facility it will do just that - although you’ll need to be well practiced to get it right! I’d go slightly deeper, maybe towards 0.5 mm.
You’ll find as you get involved that it’s best to use dissimilar materials for bushings, to take wear into account but cast iron is a useful material due to its free carbon content as a lube.
Good luck with your projects - great to learn about machinery and cutting tools this way.
John

 

[Harry Bloomfield]

I doubt I have the know-how to machine that in (but it would be fun learning), could even do a left hand spiral too, would create a type of frosting!

A spiral is used, where the direction of rotation is always the same, to 'screw' the oil or grease back where is comes from. I remember seeing one on a car crank shaft, used to return oil splash back to the sump, as the oil seal between crank and the flywheel.

 

[Burnerman]

Moggie thou, Marina, Ital Harry!
Overfill and prepare for the oil slick or clutch farewell......
John

 

[Harry Bloomfield]

Moggie thou, Marina, Ital Harry!

It was an A40 Farina.

 

[Harry Bloomfield]

It was an A40 Farina.

I've just checked the spec. they are/were 12 feet long, tiny by comparison to the 16.5 foot long monster I drive now.

 

[Stivino]

It was an A40 Farina.

I remember the district nurse had one of them. You used to know when someone was unwell because you'd see her car outside the door and it would be the only car in the street.

 

[Deleted member 174758]

They were very environmentally advanced - you didn't have to scrap them at the end of their life, they simply disolved!

 

[Harry Bloomfield]

They were very environmentally advanced - you didn't have to scrap them at the end of their life, they simply disolved!

Quite right, mine did that

 

[Deleted member 174758]

So did mine. I got a lot of welding practice on that car - gave up when there was more weld than steel !

 

[RandomGrinch]

The A40s are always great little fighters at Goodwood!