Tangential lathe tool holder

[SverreEParticipant @sverree]

I just finished my version of tangential toolholder for my homemade QCTP:

And here it is on the QCTP:

And it woorks beautifully!

Sverre

[Rik ShawParticipant @rikshaw]

Well done Sverre. Hope you will not mind me pointing out that I think you will find some limitations with your tool due to the very prominent tool bit fixing screw head. From the photo it looks as though the head will foul the first shoulder it comes up against – well before the tool point gets there

This is a problem that is quite difficult to overcome in this design which is why I approached it from a different direction in my version earlier on in the thread.

Rik

[SverreEParticipant @sverree]

Hello Rik;

Yes – I know! I just wanted to get a quick way of trying out a tangential toolholder. The big screw holds the toolbit firmly, but limits the diameter for facing to about 20 mm.

I'll have to finish the holder for grinding the toolbit, thought I would make a jig for grinding it on my new Worksharp 3000 (mostly for sharpening woodworking tools), but will give a very nice sharp edge.

Sverre

[VicParticipant @vic]

This is mine.

[_Paul_Participant @_paul_]

Very nice tool Vic what's it made from or is the grey colour some kind of heat treatment?

[Michael GilliganParticipant @michaelgilligan61133]

Posted by _Paul_ on 14/08/2014 01:52:27:

Very nice tool Vic what's it made from or is the grey colour some kind of heat treatment?

.

Paul,

I may be wrong, but I suspect it's made from "Ones and Zeroes"

… Whether I'm right or wrong; it's a lovely job, Vic.

MichaelG.

[Oompa LumpaParticipant @oompalumpa34302]

Posted by Michael Gilligan on 14/08/2014 08:20:46:

Posted by _Paul_ on 14/08/2014 01:52:27:

Very nice tool Vic what's it made from or is the grey colour some kind of heat treatment?

.

Paul,

I may be wrong, but I suspect it's made from "Ones and Zeroes"

… Whether I'm right or wrong; it's a lovely job, Vic.

MichaelG.

The only Ones and Zeros I know is binary. How would you make a toolholder from binary? I realise you could computer generate an image so are you suggesting the toiolholder is vaporware?

graham.

[Michael GilliganParticipant @michaelgilligan61133]

Graham,

Yes, I'm suggesting it is a lovely piece of image rendering.

MichaelG.

[Les Jones 1Participant @lesjones1]

And thought Michael meant CNC by his "Ones and Zeroes" comment.

Les.

[IanTParticipant @iant]

Or it's been sandblasted perhaps?

IanT

[VicParticipant @vic]

No, it's the real deal, I made it from some unknown steel but you're right, it's been sandblasted. Here's another pic of it with some other stuff I made.

[VicParticipant @vic]

In use on my Lathe (height setting).

[NJHParticipant @njh]

Michael et all

Oh ye of little faith!

Nice work Vic

Norman

[VicParticipant @vic]

Thanks Norman! Couple more pics, how it started out:

Clamp setup.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Michael Gilligan on 14/08/2014 08:20:46

I may be wrong, but I suspect it's made from "Ones and Zeroes"

… Whether I'm right or wrong; it's a lovely job, Vic.

MichaelG.

.

I did cover my options

But I am VERY impressed !!!

MichaelG.

[_Paul_Participant @_paul_]

Its so nicely sculpted its almost a work of art my friend mine is nowhere near as nice:

Your Knurling tool is nice too mine is a similar design:

Paul

[john kennedy 1Participant @johnkennedy1]

Vic, Are you known as "Firebird" on another forum? I'm sure I've seen this tool before .. John

[Neil WyattModerator @neilwyatt]

I use a very 'low profile' toolbit clamp.

Neil

[VicParticipant @vic]

Posted by john kennedy 1 on 14/08/2014 14:08:39:

Vic, Are you known as "Firebird" on another forum? I'm sure I've seen this tool before .. John

No John, must be someone else.

nice work on the Knurling tool Paul, bit better thought out than mine!

[Michael HornerParticipant @michaelhorner54327]

Posted by Vic on 14/08/2014 12:59:22:

Thanks Norman! Couple more pics, how it started out:

Clamp setup.

Nice work Vic.

I don't have that kind of artisic talent

My version is a Mike Cox variant. For the clamp I have counter bored a hole similar to what you have done but pull a tapered wedge into the hole, a bit like a cotter pin on a push bike crank. I have only just made it so I don't if it clamps better than a traditional clamp, only time wll tell.

Cheers Michael.

[Howard LewisParticipant @howardlewis46836]

The tool shown in the Autumn 2009 M.E.W. article taking 1/8" toolbits gave such impressive results that, recently, I made up a beefed up version taking 5/16" toolbits.

Sharpening,

The original Sharpening Fixture called for a 20 degree angle, (corner to corner), but the drawing seemed to suggest that the angle of the bit would be 30 degrees. Maybe that meant along the side? Any comments?

The 30 degree angle recently mentioned will results in a thinner and weaker cutting edge.

My original sharpening jig was made to 20 degrees, and the 5/16 bit was ground to that on a Worden.

Both tools work well for me, (and for at least three others used on various lathes), having been sharpened at 20 degrees).

Using a 1/4 BSF clamp screw and nut, no sign of slippage has been evident, when taking a 0.100" cut.

It appears to be capable of taking a 0.0005" cut just as well!

I do like the idea of using a tapered wedge to clamp the bit; must try that.

Currently, it has made the usual CCMT060204 tipped tool redundant. Wonder how long the honeymoon will last? Seems to stand my brutality better, and so looks to be cheaper to run!

Am now starting a holder to take 1/8" round toolbits, for use as a finishing tool, to see if an even better surface finish can be produced, than the "standard" tool used at low speed with neat cutting oil.

Howard

[VicParticipant @vic]

I've used round HSS in my bought holder to good effect. I've struggled even on a green grit wheel to sharpen some old broken carbide milling cutters but when I do I'm sure I'll be able to cut some really hard stuff should the need arise.

[VicParticipant @vic]

Couple more pics to clarify the tool angle of 12 degrees forward and 12 degrees toward the chuck.

 

 

Edited By Vic on 21/08/2014 22:32:44

[Anthony KnightsParticipant @anthonyknights16741]

Finally got around to making a right hand tangential toolholder to complement the L.H. one I made following the MEW article by Michael Cox. The step on the top is machined to the centre height of my lathe which makes setting the tool height a doddle. I will be doing the same on the original one when I get a round tuit.

[Clive HartlandParticipant @clivehartland94829]

Vic, have you a drawing of the tangential tool holder you have made? What grade steel did you use also?

Clive

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