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gambler
03-11-2016, 04:20 PM
What are these and how are they used?http://uploads.tapatalk-cdn.com/20160311/2b0ac0c146bc5405d5435e4308d9fb43.jpg

flylo
03-11-2016, 04:30 PM
Drawbars & collets that go thru the headstock. If you need a manual I think several places have them free on line or Atlas will e-mail you one.
This is on the 12" http://www.lostcreekmachine.com/PDF/Craftsman12inchlathe.pdf


http://www.practicalmachinist.com/ub...c/30/5548.html

http://vintagemachinery.org/mfgindex/detail.aspx?id=51&tab=3

Carm
03-11-2016, 04:37 PM
I believe they are for end mills or other Weldon shanks (not collets).

gzig5
03-11-2016, 04:59 PM
The drawbars "probably" can be used with MT2 collets which I think the 6" lathe has on the interior of the spindle. Those holders are most likely for end mills, center drills, or whatever cutting tool will fit, as previously stated.

flylo
03-11-2016, 05:05 PM
You are correct , not collets & I'm not sure the drawbars interchange but I think they will.

rickyb
03-11-2016, 09:36 PM
Yep, end mill holders. Not very useful without a milling vice to sit on the cross slide.

kendall
03-12-2016, 08:53 AM
Yep, end mill holders. Not very useful without a milling vice to sit on the cross slide.


Pretty sure I saw the milling attachment in his 'odd chuck' post.


edit: yep to the left first pic.

http://bbs.homeshopmachinist.net/threads/69879-Odd-chuck

J Tiers
03-12-2016, 09:55 AM
They are interesting...

I have an identical one, don't recall where it came from. I have always assumed it was a shop-made holder, but with those being identical, maybe it was a commercial product. Or maybe they were from the same magazine article as mine was...

They are nicer than some other types if you have limited "daylight" under the head, since thay are about 1/3 the amount of "stickout" as the usual long-nosed EM holders you find these days.

Those also both look like the same size hole, which is also about the size of mine..... seems odd to have two identical setups.

gambler
03-12-2016, 10:38 AM
thanks guys. I looked through all the stuff and don't have any weldon shank looking tools, however these things only have one set screw on the large diameter. and they arent mt1 or 2, I tried those.

sasquatch
03-12-2016, 02:46 PM
The 618 headstock took a #2 MT.

Gary Paine
03-12-2016, 04:22 PM
thanks guys. I looked through all the stuff and don't have any weldon shank looking tools, however these things only have one set screw on the large diameter. and they arent mt1 or 2, I tried those.

Did the original owner have a larger Atlas? The 10 and 12 inch lathes had a MT3 in the headstock. The handwheels certainly appear Atlas. If they were for your lathe, the large end of the taper to the hub that spaces the wheel would measure the length of your headstock spindle.

JCHannum
03-12-2016, 04:59 PM
Atlas offered these as accessories for both the 6" and 10" lathes. They came with one arbor that would accept a 1/2" shank tool. Collet bushings were sold separately. They are the sleeves with the square hole in the other post showing the lot of tooling that came with the lathe.

J Tiers
03-12-2016, 06:24 PM
The MT2 would be the EXTERIOR of the adaptor, the inside is almost surely a plain parallel 1/2". Mine is.

gambler
03-12-2016, 10:35 PM
Atlas offered these as accessories for both the 6" and 10" lathes. They came with one arbor that would accept a 1/2" shank tool. Collet bushings were sold separately. They are the sleeves with the square hole in the other post showing the lot of tooling that came with the lathe.

which sleeves?

gambler
03-12-2016, 10:36 PM
Did the original owner have a larger Atlas? The 10 and 12 inch lathes had a MT3 in the headstock. The handwheels certainly appear Atlas. If they were for your lathe, the large end of the taper to the hub that spaces the wheel would measure the length of your headstock spindle.

they are with the spacers on them,

gambler
03-12-2016, 10:40 PM
The MT2 would be the EXTERIOR of the adaptor, the inside is almost surely a plain parallel 1/2". Mine is.

they fit the headstock taper, which is mt2. I'm sure they are for this lathe, but I don't see how they would hold a tool. but I have to get a tool and try it, any idea which tool I should get.(size wise I mean)

J Tiers
03-12-2016, 11:17 PM
Should hold a half inch end mill. Smaller ones would be held with bushings to adapt the diameter to a half inch.

Would hold other tools also, anything with the right shank and/or bushing

gambler
03-12-2016, 11:52 PM
ok I'll get some. thanks.

J Tiers
03-13-2016, 12:08 AM
End mills tend to be available in a range of cutter end sizes for any given shank size.

The nicest shank size seems to be 3/8". Good range of stuff available. Since you also have a Logan, you can make shank adapters. Turn outside to half inch, or use half inch stock. Drill and bore inside to fit tool shank. Split on one side, and cut through most of the way on the other so it flexes nicely. Holsa at least as tight as a collet. Not as nice as an end mill holder.

And, BTW, you can make another one of those, for a 3/6" shank..... use that one to set up the angle, setting your compound with an indicator at the correct angle. I'd drill through first, probably. Use a sleeve to hold in the logan for boring to size, and only cut toward the headstock so you do not loosen it. If the 618 was working that would be where to bore it so it was as good as possible in that spindle, and then you could use the drawbar.

JCHannum
03-13-2016, 08:43 AM
In the first photo in the odd chuck thread, there are several sleeves in front of the four jaw chuck. I believe these are the sleeves for the end mill holders. If not, they look just like them. They should be 1/2" OD to fit the holder, ID to accommodate other shank sizes and a square hole to allow the setscrew on the holder to pass through the sleeve.

J Tiers
03-13-2016, 11:28 AM
Indeed. They have the same OD and apparently different ID, so that is very likely.

gambler
03-13-2016, 01:00 PM
Ok the sleeves fit the collet like things , the other sleeves fit the boring bar holder. The outside is 1/2 inch and inside is 3/8. So they are made to hold 3/8 Weldon shank milling cutters right?

JCHannum
03-13-2016, 01:49 PM
I can't guarantee the setscrews are in the proper location for Weldon shank end mills, but there is no law against using them on plain shank EMs or grinding a flat on the shank to resist slipping.

gambler
03-15-2016, 10:15 PM
Like so?http://uploads.tapatalk-cdn.com/20160316/ab0d2e9231eb803eb9c9485960ec5cd2.jpghttp://uploads.tapatalk-cdn.com/20160316/b1c1381654c5c942dab6ff28229bfc4e.jpg