Logan/mw 04tlc-701a Purchase

So Saturday and bringing home the big pieces can't come soon enough. Kinda like a kid waiting for Christmas. A lot of cleaning up of misc. parts done today and lots more to do. After Saturday I can tackle the table on which the lathe mounts. Its really grungy. Today was almost enough to make a grown man cry when I dumped some of the cardboard boxes of misc. stuff. Everything rusty. See photos. Lots of gears I'm guessing are surplus now with the quick change gear box for threading. Surprisingly the rust came off these fairly well. I didn't get to the two dozen or so taps except one 5/8x11 that turned out to be a Greenfield when rust and crud came off. The photo of all those laid out on my welding table should be titled "Table of Shame." It is beyond me that good tools just get chunked into moisture attracting cardboard boxes and left for months or years.
Lathe chuck is a Cushman 6. Was this standard on the 10" Logan/MW? It does have a set of outside (?) jaws that cleaned up pretty well considering they were coated in rust on every side earlier in the day.
The custom tool holder that mounts in a T on the cross slide cleaned up nicely too and a 9-72 stamp was found on it. An interesting home made tool holder for a cut off tool was heavily coated in rust but cleaned up good also. It looks rough even cleaned up. I'm guessing on this too that it is meant to hold a cut off tool but I don't have a clue how it mounted. Any educated guesses?
Enough sharing for one night. I'm having a lot of fun and its keeping me busy while I'm waiting for the paint shop to get started on the 47 Olds convertible project.
Jerry

Jerry,

The cutoff tool holder was almost certainly intended for mounting on the back end of a turret cross slide, with the cutoff bar inverted. A number of contractors made these slides in the 40's and 50's. I am referring to the rectangular block with 9 72 stamped on the front.

47convertible said:

I'm guessing on this too that it is meant to hold a cut off tool but I don't have a clue how it mounted. Any educated guesses?

Click to expand...

Here's an example of what Robert is talking about:



I can't recommend GHT's book more highly — even if you don't build anything in it, it's worth the read. Every page is chock full of useful little nuggets of machining wisdom.

The item on the left of the photo is a rear-mount cutoff toolpost like Robert mentioned. I plan to build one of these eventually, but haven't quite gotten started yet. It looks like your photo (lathe-extras-028-jpg) shows a similar but slightly different design (the cutter is mounted upside down in both cases, but yours doesn't hold the cutter at an angle as GHT's design does).

Yours also appears to require a holder for the parting tool (your photo lathe-extras-015.jpg). GHT's design has an integral parting tool on both sides with a rotating turret (for 1/16" and 3/32" blades). GHT's design with an integral parting tool seems superior to my estimation (with no real experience of either) since it should be more rigid without a separate holder. When I build mine, I plan to include an integral parting tool on the left, and to make a dovetail wedge for QCTP holders on the right rather than a rotating turret (I don't need different width parting tools).

For what it's worth, the finger plate shown in the middle is also a great little project. Very useful for holding fiddly little bits as you are machining them (milling/drilling/filing operations more than lathe work). The retracting top-slide for screw cutting shown on the right is a much bigger project than I'm ready to attempt, but I'd love to have one. Plans for all three (and much more) are contained in the book.

Regards,
--
Rex

Rex Walters said:

Here's an example of what Robert is talking about:

View attachment 112194

I can't recommend GHT's book more highly — even if you don't build anything in it, it's worth the read. Every page is chock full of useful little nuggets of machining wisdom.

The item on the left of the photo is a rear-mount cutoff toolpost like Robert mentioned. I plan to build one of these eventually, but haven't quite gotten started yet. It looks like your photo (lathe-extras-028-jpg) shows a similar but slightly different design (the cutter is mounted upside down in both cases, but yours doesn't hold the cutter at an angle as GHT's design does).

Yours also appears to require a holder for the parting tool (your photo lathe-extras-015.jpg). GHT's design has an integral parting tool on both sides with a rotating turret (for 1/16" and 3/32" blades). GHT's design with an integral parting tool seems superior to my estimation (with no real experience of either) since it should be more rigid without a separate holder. When I build mine, I plan to include an integral parting tool on the left, and to make a dovetail wedge for QCTP holders on the right rather than a rotating turret (I don't need different width parting tools).

For what it's worth, the finger plate shown in the middle is also a great little project. Very useful for holding fiddly little bits as you are machining them (milling/drilling/filing operations more than lathe work). The retracting top-slide for screw cutting shown on the right is a much bigger project than I'm ready to attempt, but I'd love to have one. Plans for all three (and much more) are contained in the book.

Regards,
--
Rex

Click to expand...

Hi Rex, I will be adding to the library as I get deeper into this and will keep your recommendation in mind.
The tool holder, at least I think its a cut off tool holder, that I had a question about is the one in the attached thumbnail. The other is the rectangular one that mounts in the T slot.
Also, my Logan Operators Instructions and Parts List came in the mail today. Almost as good as a Christmas catalog.
Jerry

Actually, this is what I was talking about.

.

Hey, cool! From his photo's that's exactly what Jerry (47Converible) has. Who makes that? Is it an Atlas part that someone has fitted to a Logan?

Also, what on earth does "YAJOD" mean?

Nice find.

[Edit: I called Jerry "Chris" accidentally. Corrected. Apologies.]

Also, I note that Robert's image shows the parting tool mounted directly rather than in a separate holder. Not sure why the original owner of Chris's lathe made a separate holder.

Rex,

The image (which I should have either bumped up the physical size of or the dpi of but this was the first time I'd done one of these) was taken from a 1952 Atlas catalog. However, I have seen very similar assemblies in some Logan and other catalogs. On the Atlas version, the front T-slot in the cross slide is parallel to the cross feed screw (you can see part of it). The rear slot is parallel to the spindle axis. The block that Jerry has a photo of is the same way. However, the 9 72 stamped into the front of the block is not an Atlas part number. If it were, it would have a hyphen between the 9 and the 7. Plus part number 9-72 is a Reverse Gear Driver Stud, which is a shouldered stud and gear axle in the FWD-REV gearbox for the 9" and early 10". And also, what is not visible in the photo that I attached above is that the Atlas rear single tool mounting block has a rocker at the bottom of the cutter mounting slot like the one visible on the 4-way turret. It's visible because I know where to look. The photo resolution is poor enough that the rest of you may or may not be able to recognize it. But it is the same type rocker typically found at the bottom of the slot in a lantern style tool post. Anyway, the purpose of the rocker is to allow adjustment of the cutter height to get it on center, even though it may not be horizontal. Or to put it another way, the slot for the parting tool on the back side of the Atlas rear block is like the four in the turret, not like the one in the block that Jerry has.

YAJOD is some sort of Atlas stock keeping code. Their catalogs up at least through the 50's are full of five-letter codes like that one. No explanation has ever surfaced and the people at Clausing today don't know.

Interesting.

To my surprise, Logan did offer a couple replacement double tool cross-slides. I went back and look at the back pages of my Logan/Wards catalog and found this:



Neither is what Jerry has, obviously.

Logan used adjustable wedges rather than a rocker design to adjust tool height. It's interesting to me that neither can mount the standard compound in the front (as Jerry's can, as well as the one I built).

I haven't spent much time with lantern/rocker style tool posts, and no time at all with wedges. I wonder which is more fiddly to use in practice?

Regards,
--
Rex

Yes, those are two that I recall seeing. I've seen another one somewhere that is more like the Atlas version. Atlas also offered theirs in a lever operated variant. But they used the cross feed screw as a push-rod. I haven't seen a commercial one that allows mounting the compound at the front.