For aluminium I have vague memory there is a non optimal speed there metal stick the most. Can't however if it was feed rate or rotational speed of tool.
On Sat, 24 Sep 2016 18:04:22 +1000 john mcintyre <johnan...@live.com.au> wrote: > Good Day All, > Problems with machining sticky material. > I find wd40 or crc penetrating fluid in the pressure pack and use the fine > tube nozzle to direct the > spray right onto the cutting tip . > This is good for all sticky materials as it stops the material (soft > aluminium) building up on the cutting edge. > The cutting edge is usually HSS with at least 15 degrees clearance on the > cutting edges, > the cutting edges have been honed with a fine all oil stone. > When fitting a boss to a hub, as long as the boss and the hub are the same > material (same expansion rate) > Machine the boss and hub to a firm slide fit ( stops misalignment in > assemble) then use Loctite 680 or similar. > prep spay both surfaces with activater let dry , then apply Loctite and > assemble ( do not waste time in assembly) > And if this is not enough scotch key them also (belt and braces job) > > > > From: ghesk...@shentel.net > > To: emc-users@lists.sourceforge.net > > Date: Fri, 23 Sep 2016 19:15:18 -0400 > > Subject: Re: [Emc-users] Anybody have an idea how... > > > > 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 > > -- > > "There are four boxes to be used in defense of liberty: > > soap, ballot, jury, and ammo. Please use in that order." > > -Ed Howdershelt (Author) > > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > > ------------------------------------------------------------------------------ > > _______________________________________________ > > 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 ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
