Gentlemen, The press or temperature or impact (a BFH) question is - depends on what equipment you have to facilitate the installation. Liquid nitrogen is better than dry ice. Dry ice is ~-125F and liquid nitrogen is ~320F. 2 inch steel will shrink ~.006in @ -320F from room temperature. A 2 inch bushing will rattle into a .002 undersize bore. You will still have bushing ID distortion no matter how small the interference fit. Take care of the distortion after the installation.
The more important question is 'what is the running temperature of the assembly and the coefficient of expansion of the materials'. If you are putting a steel bushing in an aluminum plate you will want more interference. To answer the asked question I would say "Use a cylinder hone to size the bore of the bushing as required". You don't want a glaze breaker ball hone. You want to use a 4 stone cylinder hone. just my 2 cents regards Stuart On Thu, Jun 13, 2024 at 8:58 PM BRIAN GLACKIN <glackin.br...@gmail.com> wrote: > Get a temperature differential of 100C between the two parts (outer hotter) > to aid in placement. > > For work we fit large bronze bushings in crusher components. Pack in dry > ice for about 2-4 hrs for a 50kg bushing. Slide into inner bore quickly. > > In cold weather we will also warm up the outer assembly to insure install > room prior to Fitting. > > > > On Tue, Jun 11, 2024 at 8:29 AM Nicklas SB Karlsson <n...@nksb.eu> wrote: > > > Anyone here have experience with press fitted guide bushing and pillar? > > > > Tried with a somewhat undersized hole so that a few tonnes of pressure is > > needed for the guide bushing. Then of course > > the bushing is squeezed and the pillar will not fit inside without some > > force. Make hole as exact as possible then this > > is not a problem but there is a risk bushing will get lose. > > > > > > Regards Nicklas Karlsson > > > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Addressee is the intended audience. If you are not the addressee then my consent is not given for you to read this email furthermore it is my wish you would close this without saving or reading, and cease and desist from saving or opening my private correspondence. Thank you for honoring my wish. _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
