[PSUBS-MAILIST] Press Fit

[Sean T. Stevenson via Personal_Submersibles]

Be careful with press fitting a bearing. If you get it even slightly too tight, it can adversely affect running friction and smoothness. The bearing manufacturer should provide technical data on the recommended fit class, and you need to take care to target that accurately. Or, as others have indicated, use a clearance fit and just loctite or preload the installed bearing to prevent any relative movement of the static race.

Sean

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-------- Original Message --------
On Mar 29, 2018, 07:47, Jon Wallace via Personal_Submersibles wrote:

> Alan,
>
> Search the internet for press fit, bore, shaft...something like that...I found a tooling handbook that had a chart describing how large a bore to produce different levels of "press fit", from kinda-loose to needing a hydraulic press for insertion.  Wish I had book marked that web page now.
>
> Jon
>
> ---------------------------------------------------------------
> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> To: personal_submersibles at psubs.org
> Sent: Thursday, March 29, 2018 5:35 AM
> Subject: [PSUBS-MAILIST] Press Fit
>
> Hi,
> I'm wanting to press fit a bearing in to my aluminium thruster housing
> & wondering if I could make a tool slightly less in diameter than my bearing,
> fit it in the lathes tail stock, & wind it in to force the bearing in to the press fit.
>   I have heard figures like 500lb force being used for press fitting, which I
> won't get winding the tail stock, & probably don't require as there is not a
> lot of dynamic force on the bearing.
>   I imagine there will be a lot of trial & error involved getting the bore to
> the right diameter, & this method will allow me to keep the work in the chuck
> & keep doing fine passes until I get it to the right diameter.
> Any thoughts or experience with this thanks.
> Alan
>
> Sent from my iPad
>
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