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Diamomd tool holder

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andy mulholland03/09/2009 23:12:31
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36 forum posts
4 photos
hi again . some questions and thoughts on the diamond tool holder.  if i wanted to grind the tool with a bit more clearence on the cutting angles what angle would you alter on the grinding jig supplied. would increasing the angle of the ramped slot have this effect.
  the other point i was wondering about concerns the limited approach to the chuck when threading because of the angle the holder has to be set at. if the threading tool was ground on  a round tool bit it could be rotated slightly in the holder. would this help or  am i missing something.  anyone any thoughts.
                                                   regards andy
chris stephens04/09/2009 01:00:21
1049 forum posts
1 photos
Hi Andy,
I have not had a close look at a "professionally" made tool holder, other than on You-tube so unfortunately I cannot say if they give you enough clearence but HSS is cheap enough to play around with and see what differences make
You are perfectly correct about the "near chuck experience" and if you come to Sandown MEX in December, have a look on the SMEE stand and all being well I shall have a few variations on the theme, including a dedicated screw cutting holder. I should be there to explain how you can make one, depending on what equipment you have.
chris stephens 
andy mulholland04/09/2009 21:24:22
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36 forum posts
4 photos
thanks Chris i will have an play with a few variants of grinding jigs when time allows. unfortunately i doubt  i'll make sandown , circumstances are such that i'm pretty much confined to home, but i'll keep an eye out on the forum and the promised article in mew  hope you get to where you want to be with your tangential tool holders and maby one day il get to see your work.
                                             regards andy
HasBean14/09/2009 22:07:55
141 forum posts
32 photos
OK gents, I'm now sold on the idea. Placed my order with Gary this morning so we shall wait and see
 
Paul
keithmart15/09/2009 08:28:15
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165 forum posts

hI

I have made mine now, and I must say that it works very well. I have a little chester lathe ansd I can take a 2mm cut on steel bar without problems.


Because the forces are downwards, there is virtually no chatter, and the finish is good.


Only one error in the making of the sharpening jig, I made it the wrong way round!!!!


Oh well, nobody's perfect.


keith


Leeds UK

chris stephens15/09/2009 11:23:13
1049 forum posts
1 photos
Hi Keith,
I hate say I told you so, but..............etc etc and welcome to the converted, your mission now is to spread the word.
 
Marvelous idea isn't it, I really cannot see why it is not more well known, yes I can, in industry carbide  came along. Oh well, at least we hobbyists can still use them to good effect.
I made a holder the other day to take 6mm Sq. carbide tool, not too succesful I am afraid.
I think the tool needs to a be a good bit steeper to give the carbide more support.
chris stephens 
Metalhacker16/09/2009 18:58:32
82 forum posts
Bought a Diamond tollholder in 1994 before I left Oz. I cuts like magic on my 918 type lathe. I later noticed a very similar device with screwed height adjustment in a Percival Marshall book of my Dad's dating from the 1930's. Used round HSS and showed how negative rake could be used on Brass etc. There is nothing new under the sun eh! I had never thought of using round HSS in the Diamond however so I will give it a try. Will make finishing cuts much easier.
 
Andries
Colchester
the artfull-codger16/09/2009 19:48:03
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304 forum posts
28 photos
Hi Andries, we had some bronze pully wheels to make for the rigging on my sons boat & the radius was just about right for  the 1/4'' hss round, it did the job great without having to grind up a form tool specially for the job.
 
 regards Graham.
chris stephens18/09/2009 19:06:38
1049 forum posts
1 photos
Dear Mr Editor Sir,
I have just looked at the number of views on various subjects and I note that this subject has the highest number, beating most by a factor of ten or so. I think, therefore, it is time you published your construction article and gave even more publicity to these "wonders of engineering"
chris stephens
(self proclaimed head of SADTHAT the society for the advancement of diamond tool holders and allied trades as opposed to SADOLDGIT of which I am just on the commitee)
David Clark 119/09/2009 08:24:57
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3357 forum posts
112 photos
10 articles
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
HasBean24/09/2009 17:20:20
141 forum posts
32 photos
Toolholder arrived today! Not bad 9 days from Australia to Jersey!
Can't wait to try it now.
 
Paul
ian burton25/09/2009 08:28:24
1 forum posts
great for polyurethane .      tool rake of up to 45 deg. easy
HasBean26/09/2009 14:18:57
141 forum posts
32 photos
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 
keithmart26/09/2009 16:37:14
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165 forum posts

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 stephens26/09/2009 23:55:36
1049 forum posts
1 photos
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 
keithmart27/09/2009 08:17:07
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165 forum posts

Hi


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


Any chance you could email details??


Keith



Leeds UK

chris stephens27/09/2009 13:21:31
1049 forum posts
1 photos
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 127/09/2009 14:26:51
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3357 forum posts
112 photos
10 articles
Hi There
Both ME and MEW pay £50 per printed page.
regards david
 
chris stephens27/09/2009 18:49:34
1049 forum posts
1 photos
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 
keithmart27/09/2009 19:00:24
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165 forum posts

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

[email protected]

Leeds UK

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

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