On Thursday 10 May 2018 09:27:57 Bengt Sjölund wrote: > Why not go for a proper tool? > > https://www.aliexpress.com/item/J41-Tapping-chuck-J4124-R8/32434340752 >.html > > Cheers > > Bengt
3 reasons, first being the price in the middle of the page, and several of its "tap saving" features would not get along with the theory of rigid tapping. Only if it could be hooked up to LCNC in such a way that the first 5 degrees of tap saving slippage could be made to simulate g33.1 reaching the depth it was told to go, so it would set a stop flag, but back out of the hole first. That $350 toy has no place in a cnc controlled shop, only in an all manual shop might it be usefull. The 3rd reason is that the one purchase I did make thru aliexpress.com 4 or 5 years back, was not a pleasing purchase. And no way to access a human to see if an agreement could be reached, as what I bought was not what I received. The product I got was similar, but was not what I bought. Diecast or extruded, not machined, timing belt pulley's that had 20 thou of runout? Flanges staked on, and came off almost too easily. They are not now on the premises, having been recycled long ago. Msgs sent to the contact address on their web page went into a black hole, no reply was ever received. > Den 2018-05-10 kl. 15:19, skrev Gene Heskett: > > On Thursday 10 May 2018 08:02:57 andy pugh wrote: > >> On 10 May 2018 at 12:22, Gene Heskett <ghesk...@shentel.net> wrote: > >>> This would, if a 3/4" R8 collet could be found with a D shaped > >>> bore, be yet another way to remove one potential slip point in > >>> trying to hold a tap for rigid tapping. > >> > >> Buy a small-bore R8 collet and have it wire spark-eroded to a > >> D-shape, perhaps? > >> > >> (You could consider plunge-eroding it yourself, I suppose) > > > > Shirley, you jest. ;-) Yes, I could do it, but how would one go > > about maintaining the concentricity in a home shop environment? > > Sounds fairly impossible to me. With what I have for a psu, and the > > lack of suitable pumping to keep the fluid clean enough to work > > well, it would take quite some time to remove that much metal from > > 300 degrees of a bore. On that, unless we can tie the feed into the > > achieved spark rate, and profile the electrode movement to > > compensate for electrode wear... lots of ellipses there, not to > > mention days of runtime. I think I'll pass. -- 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> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
