On Wednesday 30 March 2016 08:31:38 Marcus Bowman wrote: > On 30 Mar 2016, at 13:05, Gene Heskett wrote: > > On Wednesday 30 March 2016 07:45:11 andy pugh wrote: > >> On 30 March 2016 at 12:31, Gene Heskett <ghesk...@wdtv.com> wrote: > >>> The one I liked the looks of would be $214 for the full size range > >>> set. > >> > >> How many taps do you have? You only need one collet per tap. > > > > I have 0-80 to 1/2" npt, in both imperial and metric, usually > > purchased as cheap multi-sized kits, so somewhere north of 50 if all > > collected in one pile. > > > >>> And I note that some come with the note that the ER20 nut should > >>> be replaced with a special high grip version. > >> > >> Some ER nuts have a ball-race in the nose for extra efficiency in > >> clamping. http://www.ebay.co.uk/itm/371012549459 for example. > > > > Ah so. Haven't seen that one on fleabay, yet. Thanks. But neither > > firefox nor iceweasel displays the description block on that page as > > anything but raw text, 90% contaminated with html markup. > > Try > http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collet-Nuts-Wrenche >s-and-Spanners/ER-Collet-Nuts-with-Ball-Bearing-Type-A There is also a > type B nut with a bearing, on that same site. I have a type B on the > larger ER25 collets. > > Marcus
Priced in Euro's I assume? I don't have an exchange site bookmarked, so only a WAG at what that is in USD. I wonder how that would compare to a coat of moly based rifle barrel coating grease on the OD of the collet, and interior of the TTS? That is something I do have at hand. Done right, not enough is left to discolour the metal, but the moly might enable 2x the gripping pressure for the given pull on the wrench. Annointing the threads on the TTS holder too, could make a difference. I now have a full set of normal collets, so I stand a fair chance of being able to fit the taps cylindrical shank. So we'll see if they hold tight enough. I don't have any rigid tapping on my future horizon, but that is of coarse "adjustable" on 5 minutes notice if I start from scratch with an all new spindle drive on the 7x12 lathe. I'm quite tired of burning up the plastic timing pulleys because the toothed belt is a 60 yo design that doesn't have the traction modern belts have, and only available from one source in china via LMS. I've looked at the 10x22's with their variable speed motors, but that drive looks even weaker and will fail miserably with a 3" OD steel workpiece in the chuck. And I don't think that motor actually has the cajones to turn a 3" diameter piece of 4130 at the recommended surface speed and depth of cut even if the drive survived. So although I'd have a more rigid machine, I'd still have drive train problems from the gitgo. Sigh... 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> ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785471&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
