On Monday 08 February 2021 04:40:49 andy pugh wrote: > On Mon, 8 Feb 2021 at 09:09, Gene Heskett <ghesk...@shentel.net> wrote: > > > I doubt it. In fact the whole mill might be surprisingly tiny. > > A bit more research indicates that the "VH-2" in the auction > description is actually the designation of the vertical head (Vertical > Head 2?) > The mill itself is probably a Hardinge UM. > This also suggests that the machine is somewhat overpriced, as a bare > UM generally goes for around half the asking price. > (That said, there is VH-2 vertical head on eBay right now for $1650)
Hmmm.. > Looking at specs for the Hardinge horizontal millers I think that you > will find it to be a bit smaller in all dimensions than a G0704. > (Especially in table travel, which I think is unreasonably large on > the G0704 for the thickness of the table) > From a forum post: > "The TM and UM are the same machine except that the UM has a table > that swivals a few degrees. Total weight is 870 lbs. Table has 3 slots > and is 25" lg and 6 1/6" wide. Quite a bit smaller than the G0704's work envelop then. Although the cnc screws cost it about an inch of y travel, very sorely missed. > There are 32 speed selections from 110 > to 1850 rpm in clockwise & counterclockwise rotation. The table feeds > in both directions from 1/8" to 13" per min. Longitudnal feed is 14", > transverse is 5 1/2" and vertical is 13 1/4". Maximum distance from > the table to the center of the spindle is 12"" Where I can go from about 30 to 3000 on the GO704 (its a 90 volt motor getting up to 127 volts in my circuit) > On the plus side, it is a horizontal miller with a swivel table. Those > make great gear hobbers. > > Did Hardinge ever make extension spacers to > > get a few more inches of working room under the spindle? > > I think that the knee would drop off the dovetail if you did. > > Note that the machine has no quill. Though that hasn't really bothered > me on my Harrison conversion. I've always wondered hor a dual drive might be made to work so the quill and the knee moved in unison but it opposite directions. Separate homes but otherwise a single motion, set up in hal. > Whether the Hardinge is better than the G0704 for you rather depends > on what it is about the GO704 that you don't like. Biggest problem is the post isn't plumb and it will have to be picked up and reamed so the bolts have a bit of wiggle room to fix it. I haven't tried previously because I didn't have the reamers, but now I do. And I finally found some coffee cups at cafepress that claim to be a round tuit. So I've got a round tuit now. :) > If it is lack of > rigidity and geometrical truth then the Hardinge will be better. If it > is work envelope, table travel and spindle speeds then the Hardinge > will be worse. Enough worse I'll not furher persue that then. Less spindle hp too at 3/4 horse, whereas I am getting around 2 out of the labeled as a 1 on the GO704. Being abused but its hasn't complained in the nearly 6 years I've had it setup that way. > And there is the point that the GO704 is currently a working CNC mill, > whereas the Hardinge is a (probably) working manual mill. That too, so unless I come across the first link I posted but with an R8 spindle, that one is out. An MT4 belongs in an old drill press. Come warmer weather again, see if I can square up the go704. And see if I can use a longer screw in the Y. For that, I'll need to acquire a cylindrical square. Thanks Andy, a bunch. Saved me about 4 tanks of gas going to look at it. 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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis 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
