Diamomd tool holder

[David Clark 13Participant @davidclark13]

Hi There

The article went to the printers at 5:21 last night.

It is in Model Engineers’ Workshop issue no 156 due out in a fortnight.

It has complete drawings for a 10mm sqaure shank version but could easily be squared up.

Subscribers will probably be able to access the article on this website early next week.

The rest of you will have to be patient.

regards David

[HasBeanParticipant @hasbean]

Toolholder arrived today! Not bad 9 days from Australia to Jersey!

Can’t wait to try it now.

 

Paul

[ian burtonParticipant @ianburton72752]

great for polyurethane .      tool rake of up to 45 deg. easy

[HasBeanParticipant @hasbean]

Well I’ve just tried it and I am impressed! It does exactly what it says on the tin.

Even on an old unknown piece of mild steel I swivelled the toolholder around so there was very little clearance, almost rubbing, and at 300rpm produced powder like swarf and an almost mirror finish.

Worth it I reckon.

 

Paul 

[keithmartParticipant @keithmart]

Hi

I have been so pleased with the one I made, I want to make another. Does anyone have details of a jig for thread cutting?

Keith

Leeds UK

[chris stephensParticipant @chrisstephens63393]

Hi Hasbean,

I had no doubt that you would be pleased with your purchase, as I have said before it is now your mission to spread the word.

 

Hi Keithmart,

If you mean a dedicated thread cutting toolholder, can you hold out till MEX at Sandown, if so come and see one on the SMEE stand. I will try to explain how to make one with just basic Milling equipment. If circumstances should prevent me going, I shall try to deputize to another advocate.

chris stephens 

[keithmartParticipant @keithmart]

Hi

Unfortunately Sandown is too far from Leeds. About 250 miles each way.

Any chance you could email details??

Keith

Leeds UK

[chris stephensParticipant @chrisstephens63393]

Hi Keith,

I have not drawn up the holder (yet?). I just made it up as I went alomg. Drawings may not indeed make making it any easier. A few photos and paragraphs plus a bit of nouse (?) would set you on the way.  Will see if I can find the time to make another and take some photos, but don’t hold your breath, I was pacing myself for December.

chris stephens

PS does anybody know how much the page rate is in  MEW , not ME they seem to want a photo of writer and we don’t want to put people of too soon, do we.

[David Clark 13Participant @davidclark13]

Hi There

Both ME and MEW pay £50 per printed page.

regards david

 

[chris stephensParticipant @chrisstephens63393]

Hi Keith,

Just had a thought, did you mean the jig for sharpening the tool bit for screwcutting or did you mean the holder for actually doing the thread cutting,  

If it is the former, somewhere on the net there are plans drawn by, I think, Rick Kruger .

I have them in “My documents” saved for future reference. If they would be of help I can look for them or at least try to find the link so you can get them direct.

If I can find them I shall not put them here without the copyright holders permission, so the link would probably be better.

chris stephens 

[keithmartParticipant @keithmart]

Hi Chris

It is the jig to grind the tool for screwcutting using a diamond tool holder I am looking for.

You can email me if you wish.

Keith

keithmart@talktalk.net

Leeds UK

Edited By keithmart on 27/09/2009 19:02:16

[chris stephensParticipant @chrisstephens63393]

Posted by chris stephens on 27/09/2009 18:49:34:

Hi Keith,

Just had a thought, did you mean the jig for sharpening the tool bit for screwcutting or did you mean the holder for actually doing the thread cutting,  

If it is the former, somewhere on the net there are plans drawn by, I think, Rick Kruger .

I have them in “My documents” saved for future reference. If they would be of help I can look for them or at least try to find the link so you can get them direct.

If I can find them I shall not put them here without the copyright holders permission, so the link would probably be better.

chris stephens 

PS Have found a link;  http://groups.yahoo.com/group/7x12minilathe/files/Tangential%20Tool%20Holder/

you may have to join the group to get access 

[TomkParticipant @tomk39956]

Just finished the tangental tool holder that is in MEW 156. This is tool works well on my myford lathe. Had to modify the holder to get clearance and centre hieght adustment to use indixon tool holders

It takes a 0.100 inch cut with ease, that is 0.2  inche off the diameter.

Edited By TomK on 29/09/2009 15:07:06

[David Clark 13Participant @davidclark13]

Hi There

That was quick.

Did you make it from the online magazine?

regards David

 

[TomkParticipant @tomk39956]

David

             Yes printed off the pages from the online magazine

Regards  Tom

[Michael Cox 1Participant @michaelcox1]

In view of current interest in this subject and also the article in issue 156 MEW I thought others might be interested in yet another design of tangential toolholder.

This photo shows the completed toolholder mounted in the lathe:

It is easy to see the 12 degree inclination of the tool in the forward direction in this photo.

The next photo shows the end of the toolholder shank:

This shows that the shank is trapezoidal and this inclines the tool 12 degrees from the vertical towards the head stock. The next photo also illustrates this point somewhat more clearly:

The advantage of this mode of construction is that the whole tool is made from a piece of 1/4″ plate. It is only necessary to mill the slot for the tool at 12 degrees and then file or mill the shank to have the 12 degree trapezium angle. These are very straightforward operations and the whole tool can be made in 3 hours.

I hope this is of interest.

Mike

[Lawrence KeatingParticipant @lawrencekeating93306]

I live in Canada and just received one from Bay Com in the States. Been looking at the concept for years and finally took the plunge. So far – it works a charm on my Myford Super 7 with a QCTP. And talk about easy to sharpen .  I ordered it in preparation of building GHT’s Univeral Pillar Tool – just waiting for the castings.

 

I didn’t see this forum until AFTER I received the tool holder – glad to know that others have had success with it. I suspect it will become my main “weapon” of choice as well.

[David Robinson 2Participant @davidrobinson2]

Hi,

 

In a post war book on lathes there is an illustration and description of Alfred Herbert  Polytip tools. These use the same principal with carbide formed in square, round and triangular toolbits. In these tools, the holder was split from the toolbit , rearwards for about an inch and a screw to close the split, clamping the tool. they also had a support/height adjuster in the form of a grub screw in an extension under the bottom end of the toolbit.

 

Sometime in the seventies or eighties there was also an article on this same type tool from which I made one or two in the M.E. A further reason for their use mentioned was that they utilised the ‘end grain’ of the H.S. toolbits which apparently reduced wear. I have one set up on my lathe at the moment that I made all those years ago and still use.

 

Dave. 

[chris stephensParticipant @chrisstephens63393]

Hi Guys,

For those interested in the history of tools, and tangential ones in particular, take a look at;

http://www.archive.org/stream/modernmachinesho01roseuoft#page/272/mode/2up

where you will find a few types. The book is dated 1901(3rd edition), so not exactly up to the minute, but Heh, modern means CNC and five axis or more machining centres! Not what most of us knob twiddlers have.

For those who say it is difficult to scan books, this entire book is freely available to read or download. Thanks go to the University of Toronto, and the poor chap(or chapess) who had to turn the pages.

Oh dear, I can feel another old tool copy coming on, must go and take a cold shower.

That’s all for now, back to the asylum.

chris stephens

[Ian S CParticipant @iansc]

See page 119 vol 1 no 7 Model Engineering,fig 2A tangential lathe tool,it uses old warn round files for tools,these are held in place with a cotter driven in behind the tool from the top. [Note_Many readers will proberbly prefer to make their own tool-holders;but Mr Don informsus that,if desired,he will be pleased to supply holders such as he describes complete,with three cutters,at from 1s. 6d to 3s. each,post-free,according to size.-Ed.,M.E.] Think the offer is off now-IAN S C Nothings new

[Flying FiferParticipant @flyingfifer]

i`ve just gone on Eccentric engineering`s site & see that they now have a UK agent. –

Has anyone bought from this agent ?? 

 Thought I`d ask as I`m a little bit wary of PO box numbers having been burnt once before.

[Eccentric EngineerParticipant @eccentricengineer]

  Hi All

 

Just thought I’d post that my UK distributor is actually my sister, I emigrated here to Australia in 89.

I usually keep an eye on this thread so if anyone has any queries on the Diamond Tool Holder they’d like to share, I’ll be happy to post a reply.

One thing I’ll mention for owners of Mini Lathes (Sieg etc), that are considering buying a tool.

Even though the lathe centre height is large enough to fit an A9.5 , the “A ” type tools  protrude 15mm further out from the tool post than the T6. 

 With the cross slide wound right out the maximum diameter that can be turned with an A8/A9.5 is only about 25mm.

Using a T6 will increase this by 30mm, ie max dia is increased to about 55mm.

The T6 is the better choice for these smaller lathes.

 

UK prices, sizes, and ordering details will be included in the ME and MEW magazine ads from next issue.

 

Gary

Edited By Eccentric Engineer on 09/11/2009 03:38:24

Edited By Eccentric Engineer on 09/11/2009 03:39:56

[ivan kusturaParticipant @ivankustura28369]

G’day to all.

 

After picking up the Diamond Tool Holder from Gary (Eccentric Engineer )i couldn’t wait to get home and try it out, and i wasn’t dissapointed.

The only toolbit slippage i got was when i took toooo deep a cut on a rough iron casting, once i resharpened the bit and took a more sensible cut it worked great.

Due to my banged up hands and partial loss of sight in my left eye, grinding lathe toolbits with all the different angles is abit of a problem, i studied mechanical engineering for four years in college so i am well trained in freehand grinding, with the diamond tool holder and the supplied grinding jig i find it so easy and simple.

Using replaceable carbide bits was my only other option and that was getting rather costly, especialy when my two sons use the workshop building their go karts and so on.

Threading with it was very straight forward, only if it could do internal threads, grinding the toolbit with the jig was a breeze. No more expensive threading replaceable bits for me thank GOD, except for internal threading, BUGGER….

I found Gary ( Eccentric Engineering )  to be a real gentleman and after looking at some of his work in his workshop, a true proffesional in the engineering field.

After using this kit i have no hesitation in recomending it to anyone, its so easy to use and alot cheaper then some of the other options.

Regards , Ivan K.

( i have no connections to Eccentric Engineering, i just love the product )

 

 

[Author]

Posts