New Clausing 6913 - Gear box engagement lever fixed!!!!

[wa5cab]

OK.

The closer adapter usually looks somewhat like a short MT reducer sleeve but with a flange on the large end, and no drive tang. Inside fits the collet type that it was made for. Typically the bore from the small end to close to the large end is cylindrical and has a short anti-rotate peg inside near the small end that fits the keyway on the OD of the collet. At the large end is a short female taper typically between about 11 and 17 degrees each side.

 

[Dhector]

Wow. 20 TPI for sure. Not sure how I screwed that up. 18 isn't even close. I tried to figure out the taper but I will have to find another way. I tried measurements from it and an online calculator but wasn't in the range you stated. It has the marking "C" on it and that's all. I'll see what I can do to figure out the taper.

 

[wa5cab]

Well, never mind the taper. It turns out that none of the collet dimension listings that I have show the taper for the 5C. Which I am pretty sure is what you are going to find that your closer adapter and draw tube threads fit.

The Back Bearing on a conventional type collet (meaning that it is single ended, not double ended like the European ER collets) is the ring adjacent to the threads that centers up the left end of the collet in the closer adapter. It is smaller than the large end of the taper but either a few thou larger or the same diameter as the majority of the collet. For 5C, several sources give it as 1.250" diameter. Tolerance and allowance are't given in any of the tables that I have but your finding that the straight bore is a nominal 1.250" would be correct for a 5C adapter. A couple of the sources give 1.468" as the diameter of the large end of the relaxed collet. When you slide a 5C collet into an adapter just until the collet taper touches the adapter taper, the large end is not quite flush with the right end of the adapter. So your 1.440" for the diameter of the large end of the taper in the adapter is probably close. Especially as it is nearly impossible to measure the ID of the large end of a taper with ordinary calipers.

Anyway, all of your measurements to me indicate that your setup is for the 5C collets. As I wrote earlier, borrow a 5C collet and try it. Or take your draw tube and adapter to a machine shop and ask them to try it.

 

[machPete99]

Those dimensions match the 5c collet adapter for my 5914 lathe. Its 5c on the inside, supposedly MT4.5 on the outside, although it seems that there are different definitions of MT4.5 out there, which may not fit the Calausing, so don't loose it!

 

[Dhector]

Those dimensions match the 5c collet adapter for my 5914 lathe. Its 5c on the inside, supposedly MT4.5 on the outside, although it seems that there are different definitions of MT4.5 out there, which may not fit the Calausing, so don't loose it!

Could you send pics of your setup please? I have an idea in my head what its suppose to look like but I'm new to this and cant say I know for sure. I actually have two of those "Collars" like are in the picture.

I just purchased a Bridgeport clone that came with collets. Anybody ever make an adapter to make Bridgeport collets work on a lathe drawbar(collet closer)? Maybe first project for me? Or first 40 projects, hehe! I did watch "MACHINE SHOP TIPS #152 Poor Man's Collet Attachment for Clausing Lathe tubalcain " Its what gave me the idea of an adapter. What do you think?

 

[machPete99]

I don't currently have the 5c collet closer setup on my lathe but I think the kit was originally made by Royal and looks like this (not mine, see second picture in post #1):

http://www.practicalmachinist.com/v...t-chuck-faceplates-royal-collet-closer-317528

Attached is a picture of my setup, before I bought the lathe.

I am missing the "nose protector" piece, have most of the rest. The bearing in the lever assembly on mine could use replacing, but looks like it might be something special...

Bridgeport collets would be R8, completely different system, generally not used on a lathe.

 

[Dhector]

More parts have showed up for this lathe. Need some info on what it is and what its used for please. Collet indexer????? I also borrowed some 5c collets and am going to see if the drawbar will function. I talked to the guy that got the mill from the same owner of the lathe and he said he had a 3 jaw chuck for this lathe to, but I haven't seen it yet. Hoping he has collets in his pile of parts and boxes.



The chuck doesn't fit this lathe and may be for some other lathe. Not sure what it would fit, maybe someone here knows hopefully.

 

[machPete99]

That looks a little bit like a "spin indexer" or spindex, although they usually have a crank handle on the end, that one has a collet clutch lever. There are usually some disks with holes in them that can be attached. Its not generally part of a lathe, usually used on a mill.

See:

 

[chips&more]

That looks like a Hardinge HV-4N. And I’m sure there are other model numbers out there and clones. Very handy indexer, I use mine all the time. That knurled ring on the business end unscrews so you can attach other stuff and not just use the indexer with 5C collets.

 

[Dhector]

Drawbar question. I found a machine shop and borrowed 3 5c collets and the draw bar works like I think it should. I can get the collet in and out and it all works well. My problem is I have to use an aluminum bar to remove this. I assumed that the drawbar itself would remove it somehow. I have to tap on it with the aluminum bar to remove it and since I'm at the back of the machine, it just flies out and I cant catch it. I put a piece of wood on the bed to try and not damage anything. Seems like a good way to damage the surfaces in my opinion. There is approximately 1/8 gap between the drawbar end, and the end of the tapered part in the pic when it is installed. The face of the spindle and the bottom face of the part in the pic do not touch when a collet is installed. Can send a pic of installed if it helps. Is this the correct way this functions?