[PSUBS-MAILIST] Press Fit

[Hugh Fulton via Personal_Submersibles]

Alan,
What diameter is the bearing?
As the guys are saying it is a real test of your machining accuracy.  Do you
have a micrometer and telescopic gauges the right size?  If you are relying
on digital calipers you are playing with fire.  The answer to your question
is yes you can push the bearing in with the tailstock but they don't have
much push.  You can use a vice as well if it is in good condition.  I
suspect you are talking about something that is possibly only 30-40mm.  It
is very easy to over machine but you can use Loctite if you want to.
Suggest you  try a bit of aluminium bar as a test piece first.  Easy to
machine it off after or push it right through.
Hugh

-----Original Message-----
From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org]
On Behalf Of Alan via Personal_Submersibles
Sent: Thursday, 29 March 2018 10:33 PM
To: personal_submersibles at psubs.org
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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