Can you identify this?

I have a "thing" that most probably belonged to a larger thing. Some parts bear a similarity to those found on a scribing block or indicator stand. I'd be most interested to know what the indexed conical part is for.

The dovetail and gib strip has a very smooth fit. It appears to be well made.

It is a well made holder for a DTI. I have no idea re the spindle taper though.

There is one of those tapers kicking around the workshop at the museum, I believe it is for a quick release milling or maybe drilling spindle. It is probably one of the short lived fittings that were killed off by BT 30 AND 40. The DTI holder would work well on any mill spindle or lathe tailstock. I would get a blank end arbor to fit it on as the blank ends are made soft to be machined.

Edited By old mart on 23/01/2022 21:15:05

Edited By old mart on 23/01/2022 21:16:23

Now you've mentioned it, I think you're right. Many thanks.

Strange way of indexing on a taper though. If the dimples are not drilled perfectly, it could prevent the taper from seating. I'd agree it's well made and for a particular machine not a one-off item going by the black crinkle finish.

I would suggest a commercially made DTI holder for a Jig borer, not sure what make though?

Tony

Hi AJAX, are there any markings on the part?

Tony

Strange way of indexing on a taper though

More likely "retaining" than "indexing" I suspect., rather like the Easychange holders.

Is the taper pressed in to the dovetail slide or retained with a screw ? Either way it should not be difficult to separate the two and put a parallel spigot in place of the taper - you could use it on anything then. I have something similar (but not as nicely made) with a parallel stub - much easier to set up for clocking a bore on the mill than a DTI arm lash-up.

Nigel B.

I did find out what the taper was, but have forgotten and checking through googled machine tapers has not had any luck for me.

If I can find the one at the museum, I will post a picture.

Edited By old mart on 24/01/2022 18:04:28

None that I am aware of. I will post an update if I see any.

Thanks. But unless someone has a use for this taper it will be removed and replaced with a straight shank.

Thats exactly what I would do with it. But I do hate an unsolved mystery.

It is good being active on other forums also. I suspected having seen that before, but did not remember where. So I asked around, and in a couple of hours I got the answer.

This quick-change taper belongs to an Aciera 22 drilling machine. See here

Kind regards,
Hans

Edited By Versaboss on 25/01/2022 12:32:58

Well done, Hans!

This page shows an example tool holder

http://lathes.co.uk/aciera22/page2.html

I'm very pleased to know the answer.

Me too, but now I've checked the Aciera 22 drilling machine web page I feel short-changed by having only the tool holder! They look very nice machines.

They were production machines, now rather superceded by CNC.

Hey AJAX!

My name is Carsten, I saw the inquiry in the other forum where we identified the cone as the quick change system used in Aciera 22 / 23.

This is probably a long shot, but I guess it can never hurt to ask: In case you are interested to sell this to holder (and others of the same kind), let me know. I own a Aciera 22 and I am always on the lookout for these tool holders.

Cheers

Carsten

I found the one at the museum, it has a MT3 socket in it. The body is about twice the length of the one pictured.

Here it is, in good condition and the MT3 tanged socket is undamaged.

Edited By old mart on 27/01/2022 20:23:08