Question on Procunier tapping head

[Your Old Dog]

I just won one of these at auction. It looks to be has a Morse taper fitting sticking out of one end, looks like number three. How does the taper attach to the tapping head?

I bought a drill press last summer with the intention of mounting the head permanently on the dp. The quill on the dp has no provision for a key so Im' assuming it's a 33 jacobs taper but I need to vacate the morse setup from the tapper.

I can't seem to find my answer in this pdf from the manufacture.

http://www.rockford-ettco.com/Portal...1000-13000.pdf

So, how can I seperate this puppy?

[JCHannum]

Procunier and Ettco are two different manufacturers. The construction of the heads is similar in most respects. Take a good close look at the MT shank & the attachment to make sure the shank is removeable, some are manufactured integral and are not removeable. I might have an Ettco in the garage, I can take a look in the AM to see how they come apart.

Generally, they use a JT mount that is removed in the same manner as from a drill chuck. Wedges are available from Jacobs, usually available from most tool supply houses. They are used between the shoulder of the taper and housing of the attachment, and squeezed together in a vise to pop the taper out. If there is no shoulder, a cross hole can be drilled through the shank close to the attachment to operate the wedge against.

You might be able to dismantle the attachment, chuck the infeed shaft in the lathe and bore the JT taper out if you can reduce the attachment to it's component parts.

[alanganes]

I have a Procunier 2E. It is quite old, but assuming that the design has not changed, the driven end threads into the top of tapping head. Mine came with a tapered shaft of some sort that did not agree with my mill. I was able to unscrew the shaft, and make a new one with a straight shank that I just grab in a collet. If I recall correctly, there is a hole with a small bronze bushing that needs to be in the end of the shaft on the "inside". Worked fine, though I do not find myself using it very often.

This is going back a few years, so my memory may be a bit sketchy. If you think it would help, I can maybe take a look at it tomorrow afternoon and snap a pic or two to send or post.

-Al

[fasto]

Procunier and Ettco are two different manufacturers.

"Rockford Ettco Procunier" now owns both Ettco and Procunier.

I believe the Procunier heads that I have, have the input shaft screwed into the top clutch cone. To get it apart, you need to disassemble the tapping head, hold the top clutch cone with a strap wrench, hold the input shaft, and unscrew the pieces.

[Your Old Dog]

well I'm sure glad I asked.

JC, mine is removable from the looks of it. I was expecting to see a short Jacob taper there.

I never gave it a thought it might be threaded. If it don't come easily I'll assume they have a small screw coming up through the bottom as well and try again. My unit is quite old from the look of it.

Thanks Alan for the offer but don't want to put you to any trouble, let me see how I make out first and I'll try to pin down the age of this thing.

Thanks all.

[alanganes]

YOD,
No problem. I was poking around a bit last night and found the original shaft from my 2E. This is a quick pic of the end that attaches to the head itiself:



I don't recall exactly how it went in or came out, but the procedure that fasto describes sort of rings a bell. The thread on this one looks at a quick check to be 3/4-16. Some part of the clutch mechanism runs in that little sleeve bearing.

I bought this at a flea market maybe 20 years ago, and it was old then.

-Al

[JCHannum]

It has been a while since I have had one apart, and I am going on memory, so forgive me.

I see Rockford, Ettco & Procunier have merged. That does not change the fact that the two tapping heads differ slightly. I see from the site that the Procunier heads are integral shank;

http://www.rockford-ettco.com/Default.aspx?tabid=1459

That being the case, dismantling and turning the shank or making a new shank with a diameter that can be chucked in the drill press is probably the simplest expedient.

[Your Old Dog]

Thanks a lot Alan. Guess I'll have to watch for small parts pouring out if mine un-screws like yours.

[alanganes]

You're welcome. As I said, I do not recall exactly how it goes together, but I don't think it was very difficult or tricky to do. I suspect that if it was, I'd remember. Seems to be the way my brain works.

-Al