Bearing /oil seal fitting tolerance

This topic has 5 replies, 2 voices, and was last updated 7 July 2016 at 11:27 by Roger Flaherty 1.

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3 July 2016 at 20:59 #245321
Roger Flaherty 1
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@rogerflaherty1
I'm maching a shaft seal for a model submarine. The shaft is 4mm dia, the bearing 10mm dia and the oil seal 12mm dia. What diameters should I machine the housing for the correct fit for the bearing and seal. Many thanks Roger
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3 July 2016 at 20:59 #24625
Roger Flaherty 1
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@rogerflaherty1
5 July 2016 at 17:27 #245539
Roger Flaherty 1
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@rogerflaherty1
Just to add, the housing is stainless steel, any advice would be much appreciated.
5 July 2016 at 17:41 #245540
Keith Long
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@keithlong89920
Roger

Just put "fits for bearing housings" into Google and you'll come up with pages of information. The first "hit" I get is for SKF. You'll need to read through it and open the various pdfs that they have. Fit can depend on whether its the shaft that rotates or the housing and what loads in what directions are applied – it literally ISN'T a case of one size fits all. Oil seal will be more tolerant but a similar search shoud come up with the goods as well.
5 July 2016 at 18:15 #245544
Roger Flaherty 1
Participant
@rogerflaherty1
Keith, Many thanks, why didn't I think of doing that. Have just Googled for oil seal fit and found answer quickly. Many thanks. Roger
7 July 2016 at 11:27 #245701
Roger Flaherty 1
Participant
@rogerflaherty1
Keith

After much reading I came across a piece on the SKF Web site which said that 'rubber' oil seals have the 'fit amount' built in and sure enough when I measured the new seal it was oversized by 23 micro mm (the recommended amount) and push fitted into the 12mm housing. Again thanks for your help. Roger
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Bearing /oil seal fitting tolerance

Bearing /oil seal fitting tolerance

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