As far as dimensions go im not much help but heat i can hole heartedly recommend. Aluminum moves a lot with temp. The rule of thumb is you can heat any aluminum to 60 deg C (not quite burn your hands hot potato hot) and not worry about affecting temper. You would be amazed how this small amount of heat in a boss will free up a steel pin you couldn't drive out with a 10lbs hammer to the point you can knock it out with a good thump from your hand.
On 2016-09-23 04:15 PM, Gene Heskett wrote: > On Friday 23 September 2016 15:21:28 Gene Heskett wrote: > >> On Friday 23 September 2016 04:34:35 Andy Pugh wrote: >>>> On 23 Sep 2016, at 08:02, Gene Heskett <ghesk...@shentel.net> >>>> wrote: >>>> >>>> gave up and put a 3/8 >>>> drill in the holder. That worked for a starter hole and the bar >>>> then ran in and tried to uniform the hole, looking decent >>> Are you trying to use a boring bar without drilling a starter hole? >>> I don't think they are intended for that. >> As I found, but the end of its original tip contour sure looked like >> it could do it, and it did, for about 12 mm's., then became a problem >> child. So I drilled a 3/8" start hole, then expended that about a mm >> before I gave it up last night. So now I need the hit it a couple more >> times to get a hole to calibrate x with and finish that up. >> > Which I am pretty close to now. The hub is made and fits fairly well, > with an OD where the pulley will be driven onto it of about 43.35 mm's. > > And the pulley is bored to about 42.25 mm's when I thought it was past > time to get off my feet. > > So my next question , and considering both pieces are alu, is whats the > target for the final bore of the pulley for a good tight press fit? And > should I heat the pulley and freeze the hub? > > Had din-din, beer-thirty now. > > > Cheers, Gene Heskett ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
