<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV>Alan, Can you get very close tolerances and then heat fit the part that you want to have on the outside and then put your bearing in and let it cool to get a very tight fit.</DIV><DIV> </DIV><DIV>Brian <BR><BR>--- personal_submersibles@psubs.org wrote:<BR><BR>From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><BR>To: Alan via Personal_Submersibles <personal_submersibles@psubs.org><BR>Subject: Re: [PSUBS-MAILIST] Press Fit<BR>Date: Thu, 29 Mar 2018 14:01:50 +0000 (UTC)<BR><BR></DIV><DIV style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; font-size: 13px;"><DIV></DIV>
<DIV>Alan,</DIV><DIV>Even with your part in the chuck tighten down it can still move, your talking about some pretty precise stuff here. Give it a try first, put your part in and machine some and push against it and then machine it again and see if it is off. Your better off finding the perfect size the first time. This is why I have to make parts more than once lol</DIV><DIV>Hank </DIV><DIV><BR></DIV>
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On Thursday, March 29, 2018, 7:44:08 AM MDT, Alan via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<DIV><DIV><DIV><DIV>Hank,</DIV><DIV>not sure what you are meaning.</DIV><DIV>The piece ( front section of thruster) is held in the jaws.</DIV><DIV>I can hand hold the bearing in place & wind in the tail stock until the tool</DIV><DIV>in the tailstock engages the bearing. I then let go & continue winding the</DIV><DIV>tail stock. If I can't press the bearing in with the tail stock I back it off</DIV><DIV>& machine a bit more out of the bore & repeat the process.</DIV><DIV>Alan</DIV><DIV><BR><BR>Sent from my iPad</DIV><DIV><DIV><BR>On 30/03/2018, at 12:28 AM, hank pronk via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:<BR><BR></DIV><BLOCKQUOTE><DIV><DIV style="font-family: Helvetica Neue, Helvetica, Arial, sans-serif; font-size: 13px;"><DIV></DIV>
<DIV>Alan,</DIV><DIV>The problem with your plan is, you will move your piece that your machining when you try to push the bearing in. </DIV><DIV>Hank</DIV><DIV><BR></DIV>
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On Thursday, March 29, 2018, 4:09:52 AM MDT, emile via Personal_Submersibles <<A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A>> wrote:
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<DIV><DIV dir="ltr">Hi Alan,<BR><BR>Press fit is good for a durable bearing construction. <BR>Force is not leading, you're to late when the force is too high... You can<BR>find in a bearing handbook how much the diameter difference should be.<BR>Is about 0,02 to 0,03 mm for small /medium bearings.<BR>Loctite 638 or 603 is a alternative.<BR><BR>Br, Emile<BR><BR>-----Oorspronkelijk bericht-----<BR>Van: Personal_Submersibles [mailto:<A href="mailto:personal_submersibles-bounces@psubs.org">personal_submersibles-bounces@psubs.org</A>]<BR>Namens Alan via Personal_Submersibles<BR>Verzonden: donderdag 29 maart 2018 11:33<BR>Aan: <A href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A><BR>Onderwerp: [PSUBS-MAILIST] Press Fit<BR><BR>Hi,<BR>I'm wanting to press fit a bearing in to my aluminium thruster housing &<BR>wondering if I could make a tool slightly less in diameter than my bearing,<BR>fit it in the lathes tail stock, & wind it in to force the bearing in to the<BR>press fit.<BR> I have heard figures like 500lb force being used for press fitting, which<BR>I won't get winding the tail stock, & probably don't require as there is not<BR>a lot of dynamic force on the bearing. <BR> I imagine there will be a lot of trial & error involved getting the bore<BR>to the right diameter, & this method will allow me to keep the work in the<BR>chuck & keep doing fine passes until I get it to the right diameter.<BR>Any thoughts or experience with this thanks.<BR>Alan<BR><BR>Sent from my iPad<BR><BR>_______________________________________________<BR>Personal_Submersibles mailing list<BR><A href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</A><BR><A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A><DIV><BR><BR>_______________________________________________<BR>Personal_Submersibles mailing list<BR><A href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</A><BR><A href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</A><BR></DIV></DIV></DIV>
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