What is it

[john brown 17Participant @johnbrown17]

[john brown 17Participant @johnbrown17]

Any clues please

[Phil PParticipant @philp]

I dont know but I want one !

Phil

[john brown 17Participant @johnbrown17]

Another one?

 

Edited By JasonB on 02/10/2019 18:32:35

[Clive FosterParticipant @clivefoster55965]

Looks to be some sort of adjustable offset indexing device although there is no obvious means of holding a workpiece to it. Unless the central screw is simply a blanking plug to protect a threaded bore into which suitable carriers can be fixed.

I had a similar device made many years ago as part of what could be called a laser protection filter test rig so that multiple tests could be made on one sample and damage objectively evaluated.

Clive

[JasonBModerator @jasonb]

Could they be some form of slotting tool for cutting internal splines.

Depth of cut on the first one is done like a boring head and the second one would have a similar arrangement. You then index the cutter round for the number of splines required. Drive it in and out on a slotter or manual rack and pinion, maybe even horizontally on a shaper

[JasonBModerator @jasonb]

The first looks very similar to one of the Deckle punch milling attachments.

[john brown 17Participant @johnbrown17]

Well l have looked at them for weeks,but do think jason is right about the tool for cutting internal splines,as for the other one have not got a clue ,l did think about altering it to use in the tail stock for taper turning,but will se if anyone knows what it is before l play with it.

john

[JasonBModerator @jasonb]

Is that small "boring head" ty etool in the second photo actually being held in a collet, similarities to this Aciera accessory

[old martParticipant @oldmart]

Clive Fosters first paragraph beat me to the post, its exactly what I would have written.

And Jason B beat me with his thoughts about the second one.

[john brown 17Participant @johnbrown17]

Yes jason its held in with a collet,have also got some very small boring bars with it,that go in the head

john

[peak4Participant @peak4]

Re, the first one, the table on my Meddings high speed drill sits on a similar boss
This could replace the table, depending on size, and allow a circle of holes at a fixed pcd, adjustable via the dovetail slide.
Is there a sensible number of slots, say 36 to give 10º spacing, or 24 to give a 15º spacing?

Alternatively for holding cutters or saws on a tool and cutter grinder, either for sharpening, or making in the first place.

Bill

[john brown 17Participant @johnbrown17]

Yes bill there are indeed 24 slots on the tool,to me it looks like it was factory made ? with its chrome part on it and the finish ,its just knowing what it was for and if it is still of use to anyone before l play with it.

john

[BazyleParticipant @bazyle]

First one can also become the basis for an ornamental turning 'eccentric chuck' which might be what you were thinking of doing with it.

[Bill Davies 2Participant @billdavies2]

Well, neglecting the small boring head, the second one looks like it could be a cutter grinder attachment. The hex brass piece and the rod through it may be part of the spring-loaded blade for indexing off the cutter, rather than using fixed division plates. For example, if the flutes were not evenly distributed, as in some anti-chatter reamers. When I sharpened cutters, this was the method used, both on new ones being ground for the first time, and for subsequent re-sharpening.

[john brown 17Participant @johnbrown17]

Hi bill ,the brass hex piece an rod ,just lock the spindle as you index it ,l think that tool will have a use ,had another look today and it will fit the tee slots on the myford,so could be handy for small boring work,just a thought.

john

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