bearing to shaft fit

[sardine]

I have a sealed bearing with a 0.624 " bore, and the motor shaft it needs to go on is 0.630 ", is this the correct size for a press fit ?

 

[DanielW]

for a shaft size of 0.630 I think the minimum bore should be 0.626?

 

[gordon stephenson]

0.006" thou seams like way too much interference to me. The bearing bore is probably giving you a good clue. shaft size of 5/8ths = 0.625" Looks to me that you have an imperial size bearing and the the shaft is metric I;E 16mm = 0.629"

 

[sardine]

I ordered the wrong bearings, the motor is 1940,s but the bearings are metric.

 

[Sidewinder]

You can get metric bearings with a metric od & width, & a 5/8" bore I bought some for an old machine a few months ago.

 

[gordon stephenson]

Long time ago I knew a guy that made a lot of money altering bearings to suit machines that bearings could no longer be obtained for, I suppose there are still places doing the same thing.

 

[wristpin]

Used to do that quite often when I repaired lawnmowers and used a good used metric cutting cylinder to replace a damaged imperial one in an old machine that didn't warrant the cost of a new cylinder, bearings and carriers.
Pop the balls out and fit the metric inner into the imperial outer. Solved the problem but possibly caused a bit of head scratching for someone in the future!

 

[Wendelspanswick]

Used to do that quite often when I repaired lawnmowers and used a good used metric cutting cylinder to replace a damaged imperial one in an old machine that didn't warrant the cost of a new cylinder, bearings and carriers.
Pop the balls out and fit the metric inner into the imperial outer. Solved the problem but possibly caused a bit of head scratching for someone in the future!

How do you seperate the bearing without destroying it?

 

[penfold]

How do you seperate the bearing without destroying it?

I'd assume you split the cage, then the balls will drop out readily; fiddly business getting the barstewards back in though.

 

[Sidewinder]

Long time ago I knew a guy that made a lot of money altering bearings to suit machines that bearings could no longer be obtained for, I suppose there are still places doing the same thing.

SKF make them @ their factory, so there is no need to mix & match for that particular size, they are an accepted international standard bearing, with an internationally recognised bearing code.