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Re: tailstock end of Unimat alloy bed...


 

I don't have, nor have I ever seen the extended way bars? from Emco, but I made a replacement set of way bars from chromed 12mm linear guide rod, and cut them down to match the original way bars for the 1st Unimat. I've got a pair of 600mm long, 12mm? linear guide rods coming. Should be here Wednesday. I'm not going to be using the full length, I don't believe, but it won't hurt me to have a bit more stock for my pile, either. I believe I'll see if I can get 12" between centers. IIRC, I used 300mm linear guide rods for the stock-sized ways. Just using extended way bars hanging out loose at the end might be OK, but I knew where a cut down bed was, more or less, and it's on it's way, too. They're maybe not as rare as I thought, but they're not in production anymore, either, so didn't want to cut another one down. Photo I took of my SL after I fit the new way bars to it, and before I cut them down I could move the ends of the bars pretty easily. For just parking the tailstock, that's probably alright, but I'd like to be able to use it, if possible. Still might not work. As Andrei noted, the 12mm way bars aren't the most rigid things in the world.?

So we'll see if it's practical. And if not, I've got spiffy new way bars on the DB, as well, and it didn't cost me a great deal to figure things out.?

Bill in OKC

William R. Meyers, MSgt, USAF(Ret.)

Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome.
Physics doesn't care about your schedule.
The only reason I know anything is because I've done it wrong enough times to START to know better.
Expect in one hand, expectorate in the other. See which one gets full first.



On Monday, July 3, 2023 at 12:25:09 PM CDT, Guy Winton <kooldude@...> wrote:


arguably, one could accomplish a similar result using the extra-long Unimat accessory way bars and place the tailstock on the other side of the end-of-bed.

-Guy-

On June 30, 2023 at 8:22 PM "OldToolmaker via groups.io" <old_toolmaker@...> wrote:


Hello, Bill
I have often had thoughts of making two rectangular blocks from cast iron with two ¡°v¡± grooves to make my own extended Unimat clone. With this arrangement the bed bed length can be varied to suit at will depending upon how far apart the blocks are placed. No need to cut up a perfectly good SL. I have made several sets sets of way bars from Thomson linear precision ground and hard chrome plated. I made a special fixture for drilling the cross holes with carbide spade drills to bolt down the way bars. I will probably follow though with this as soon as I get my shop relocated and set up.
Dick
--
http://www.homemadetools.net/ forum/?OFF- SET-tailstock-center-65965#post105972
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?MINI LATHE COMPOUND PIVOT MODIFICATION


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