My bad habit - lathe auction tooling

[rslaback]

So I have a bad habit of bidding on items that I think are undervalued at a local auction house. I put in a single proxy bid of the amount that I think I would kick myself for letting go for less than and then let it ride. Most times I don't get the lot but every now and then I do.
This week I snagged a lot of lathe tooling. Large lathe tooling. And I have questions.

There is a 3 jaw scroll chuck, a couple 4 jaw chucks and a couple of face plates to go along with 3 steady rests (one homebrew) and a couple of boxes of dogs. A few other pieces have me scratching my head though.

There is a spindle mount of some type that I am guessing is a protector for use with a collet setup. It has the chuck mount taper and thread but no other way that I can see to interface with stock. There are also two rings of a similar stepped design but of different diameters. At first I thought it was just a project remnant but the two parts of different size have me questioning that. Any ideas?

Also, does anyone recognize the spindle mount on these? Looks to be a 6"-6 external thread on the chuck that mates with a significant spindle taper with maybe a drive key. Nothing I am familiar with seeing before.

Based on the steady rests, the lathe these are from has a 16" swing.

 

[dr_clyde]

That’s the American Long Taper, also called L-Taper.

 

[NC Fabricator25]

Looks likely to be an American Standard Type L, or Long Taper, ranges in size from L00 (smallest) to L3 (largest). A bit tough to tell by your measurements and photos, but I’m thinking it’s an L1 taper.

For reference, I have an older Rockwell 14” lathe that uses the L00 taper, so this would be for a larger machine, perhaps in the 18”-20” swing range.

 

[rslaback]

Looks likely to be an American Standard Type L, or Long Taper, ranges in size from L00 (smallest) to L3 (largest). A bit tough to tell by your measurements and photos, but I’m thinking it’s an L1 taper.

For reference, I have an older Rockwell 14” lathe that uses the L00 taper, so this would be for a larger machine, perhaps in the 18”-20” swing range.

Thanks guys. The 6 x6 thread makes it a L1 doesn't it?

Lathe Spindle Fittings Page 2

How the lathe works. Names of lathe parts. Screwcutting. Generating changewheel charts. countershafts. backgears. tumble reverse. Stuck chucks. Quick-change toolposts. Fitting a chuck Spindle nose fittings, backplates, Oiling

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[NC Fabricator25]

^ Yes, that would be correct. I was guesstimating off the pic showing the internal diameter, plus ”about an inch” on each side for the threads. The key way would be 5/8” wide as well on an L1.

 

[rslaback]

With that mystery solved I will get them in an electrolysis tank and see if I can get my 44 dollars back.

 

[DocsMachine]

How big is that faceplate? I have a 16" lathe with an L1 spindle, that actually swings a little over 18".

Doc.

 

[matt_i]

The Long taper device reminds me of a piece of a Jacobs rubberflex handwheel collet closer. The rubberflex collets had a lot more range than standard tool steel collets (usually with 1/64" range in 5C and 2J). However, the collets are long obsolete/NLA. I had a set for my old Clausing 5914 which used the L-00 taper.

Note to self for future generations - make sure you tag, engrave, etch, paint mark or otherwise denote which steadies go with which machine (if you know). There are pallets upon pallets of steadies separated from their machines with no way to tell....

 

[Jswain]

I'm failing to see the bad habit?

 

[rslaback]

How big is that faceplate? I have a 16" lathe with an L1 spindle, that actually swings a little over 18".

Doc.

It measures 14" on the nose.

 

[landlord30]

With that mystery solved I will get them in an electrolysis tank and see if I can get my 44 dollars back.

If you paid 44 bucks for all that, you ****!!!

 

[slowtwitch73]

The one deal is an L taper spindle guard when using 5c collets... basically just keeps the spindle nut from flapping around.. 'gives it something to do'. Should get some good $$ for it and easy to ship.

The big rings may be for tensioning the jaws/scroll when re grinding the jaws on 3 jaws chucks.