Diamomd tool holder

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Diamomd tool holder

This topic has 72 replies, 30 voices, and was last updated 21 February 2010 at 12:39 by ivan kustura.

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12 July 2009 at 21:35 #42308
George Scollay
Participant
@georgescollay44108
Hi, Has anyone purchased the diamond tool holder that is advertised by Eccentric Engineering,I have been thinking about one but would like to know if anybody has good or bad reports about it, watched the video and was impressed with it,Thanks

Edited By Geoge Scollay on 12/07/2009 21:36:59

Edited By Geoge Scollay on 12/07/2009 21:38:02
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12 July 2009 at 21:35 #16486
George Scollay
Participant
@georgescollay44108
13 July 2009 at 09:14 #42316
David Clark 13
Participant
@davidclark13
Hi There

I have heard it is very good.

I do have an article to publish on making a tangential turning tool that is very similar.

It will go into Model Engineers’ Workshop.

regards David
13 July 2009 at 12:26 #42319
Circlip
Participant
@circlip
Try this link Geoge :- http://www.gadgetbuilder.com/ToolHolders.html#Tangent

Regards Ian.
13 July 2009 at 17:34 #42324
John Yewbrey
Participant
@johnyewbrey17165
Hi George, In responce to you question about the Diamond tool holder I can say that it is fantastic. I have used one now for about a month and would not be without it.

Hope you find this info usefull.

Regards John
13 July 2009 at 20:55 #42329
chris stephens
Participant
@chrisstephens63393
Hi George,

If you try a Tangential tool holder you will not be disappointed. I have been demonstating my version on the SMEE stand at the last two MEX’s, and feedback always seems very positive. Not only do they cut very cleanly, they are a doddle to sharpen. This last point makes them ideal for learners who have not yet learnt to grind a “normal” toolbit. Makes expensive TC indexable bits redundant, almost.

Regards

chris
17 July 2009 at 17:05 #42391
Jim Whetren
Participant
@jimwhetren72358
Hi George,

I too have been facinated by this tool varient and have been impressed with the video. However, I find it hard to justify spending £67.23 on a lathe tool.

I have had a second look at the graver/chamfering tool I made as per GHT’s instructions to use with my hand rest. This was a piece if 3/16 square HSS ground to 45 deg. diagonally by holding it in a small V block. The point of the diamond face is 70 deg. this is of course with the tool tilted to 45 deg. in both vertical planes.

If the bit is angled at 20 deg. in both planes, the tip angle is 80 deg. and if it is also twisted 5deg. anti clockwise, there is 5 deg. clearance for both turning and facing with an overkill 20 deg. front and side clearance. The top rake is about 20 deg. each direction.

In my usual makeshift way I tried mounting the tool bit this way and took a turning cut the full width of the tool with no problem, and a facing cut of about 2mm. With a slight in-feed the tool was reversed out and the the finish on the face was amazing. This was on a piece of 22mm dia. FCMS.

Regards

Jim
18 July 2009 at 07:36 #42403
modeng2000
Participant
@modeng2000
I have not regretted buying one. The cost of inserts soon adds up to the cost of the diamond tool.

John
18 July 2009 at 09:49 #42405
Terry Lane
Participant
@terrylane
The couple of commercial ones I have seen in action work quite well, even if they are a bit silvery. My home made version works just fine and was considerably less spendy.

There are quite a few schemes for making them getting about – a quick web search should give you plenty of ideas.

Edited By Terry Lane on 18/07/2009 09:57:18
19 July 2009 at 09:54 #42420
Grumpy
Participant
@grumpy72061
I’ve used the Diamond tool for three or four years now and hardly use anything else. Aside from a parting tool and boring bar I hardly use anything else
3 August 2009 at 20:22 #42616
George Scollay
Participant
@georgescollay44108
I have gone and purchased the tool and tried it out ,what a pleasure to use and to sharpen it is so easy, I know the price is high but as modeng 2000 states you soon spend the same money on other tools,looking forward to using it more often
6 August 2009 at 09:12 #42679
Colin Reed
Participant
@colinreed51485
George

Are you in the UK, and if so did you purchase your diamond toolholder from bay-com? If so I was just wondering how much it ended up costing in UKP, import duties etc..

Regards

Colin
6 August 2009 at 09:57 #42681
ken heppener
Participant
@kenheppener64998
Hi George

I just ordered one yesterday…..I watched the vidio and was most impressed….Can’t wait to try it out….Regards Ken.
6 August 2009 at 13:06 #42684
D.C.Clark
Participant
@d-c-clark
Hello Group,

Here’s my implementation of a tangential tool holder on my Sherline lathe. I adapted my design from an article by Marcelo Jost in the January-February 2008 issue of “The Home Shop Machinist” . He was inspired
by an article in Rudy Kouhoupt’s Shop Wisdom volume 3.

I’ve been very pleased with it’s performance.

David Clark in Southern Maryland, USA
6 August 2009 at 14:19 #42685
chris stephens
Participant
@chrisstephens63393
Hi David,

An excellent interpretation, do you have clearance problems on larger diametres?

chris
6 August 2009 at 14:25 #42686
keithmart
Participant
@keithmart
QUOTE:

Posted by D.C.Clark on 06/08/2009 13:06:17:
an article by Marcelo Jost in the January-February 2008 issue of “The Home Shop Machinist” .

Hi

I have the magazine in question, it was January/february 2009. The article is 14 pages long, including pictures.

It is something that I have considered making, and, now maybe I will get down to it.

regards

Keith

Leeds UK
6 August 2009 at 20:25 #42693
George Scollay
Participant
@georgescollay44108
HI, Colin I am in the U K and purchased the tool from Eccentric Engineering who come from Australia,Tool price was 125 dollars + 12 dollars postage which was somewhere about £68, and Ken you will not be disapointed with your purchase
6 August 2009 at 20:28 #42694
Colin Reed
Participant
@colinreed51485
Posted by George Scollay on 06/08/2009 20:25:22:

HI, Colin I am in the U K and purchased the tool from Eccentric Engineering who come from Australia

Thanks George, that’s just what I was after.

Colin
6 August 2009 at 21:16 #42695
D.C.Clark
Participant
@d-c-clark
Thanks Chis,

The tool holder does not interfere with the maximum clearance between the Sherline spindle axis and the top of the cross slide table. For larger diameters, those that extend below and in front of the table, the tool is limited to facing and about 3/4 inch of turning. This could easily be extended, but I would make the tool holder wider for greater stiffness.

Thank you, Keith, for correcting me on the year of issue. I’ve attached some “in process photos”. As you see, I created the double compound angles by using Sherline’s tilting angle table, rotated on the mill table. This allowed me to machine all the angles in one setup, only changing the position of the the mill vise on the angle table. The material was 12L14 steel.

Layout and roughed out.

Double compound angle setup

Milling the front face

Drilling holes for clamping screws

Edited By D.C.Clark on 06/08/2009 21:18:37

Edited By D.C.Clark on 06/08/2009 21:20:12
7 August 2009 at 04:50 #42697
russell
Participant
@russell
i also am very reluctant to spend money, but this was worth it. I use it on my 1915 drummond flatbed, and it successfully overcomes my inability to sharpen a tool.

i thought about trying to make one, but i have little enough shed time as it is, and making a tool to make a tool to make what i wanted in the first place seemed one step too far.

russell

(australia)
7 August 2009 at 20:32 #42719
david sympson
Participant
@davidsympson63483
   Hi George

   I made four of these tools about 20 years ago after buying a pre-war

commercial one at a car boot sale. I made two with straight shanks one to fit a Dickson

quick change tool holder and one to fit a quick change of my own design

   The straight shank ones have had very little use but the two others have had 20 years

hard use and I dont know how I managed without them

   Dave Sympson. 01430 861623 YORK area

   dsympson@uwclub.net
11 August 2009 at 15:00 #42803
chris stephens
Participant
@chrisstephens63393
Hi All fans of Diamond tool-holders,

For those of you how mistakenly think a Diamond/Tangential toolholder is a new or novel idea, take a look at the picture , hopefully, below. It is an image from a book dated 1886, just goes to show “there is nothing new under the Sun”. Looks kinda familiar, don’t you think?

chris

Clearly my hopes where dashed! How do you post images? It was one the same page as the text but did not come out on the post.

Edited By chris stephens on 11/08/2009 15:05:10

Edited By chris stephens on 11/08/2009 15:13:56
13 August 2009 at 05:13 #42832
David Blunn
Participant
@davidblunn56158
The tangential toolholders give a good finish and is easy to use. The only issue I have noticed with mine (eccentric) is when thread cutting (the finished thread is excellent) you have to cant the tool holder around to the tailstock to get the tool square to the work and this limits how close you can get to the chuck or a large shoulder. Other than this the tool is excellent and the only carbide insert tool I regularly use is the parting tool (another must have).

Regards,

Dave

Berry NSW

Australia
13 August 2009 at 12:44 #42837
chris stephens
Participant
@chrisstephens63393
Hi Dave,

I must agree with you about the benefits and short comings of thread cutting. I have been making some pushbike axles from EN16T, to replace bendy Alloy ones, and get really clean cuts and threads. Downside is the ridiculous angle of the toolholder (home made) so have plans to make a special for thread cutting, just have to get my poor brain around the angles needed, unless I make one with a swiveling end! Maybe not.

Hope I can finish in time for SMEE demonstrations at Sandown MEX, unfortunately I live in a time-machine and if I am not careful and blink, I jump forward a month or two. I can’t seem to find the reverse controls.

chris

If this comes up twice, blame Google Chrome.
16 August 2009 at 01:08 #42895
David Blunn
Participant
@davidblunn56158
Hi Chris,

I know exactly what you mean about the time machine, I’m stuck in one of those as well. A holder just for threading would be excellent. As for those compound angles, they do my head in as well.

Good luck with getting it all together for the SMEE demonstration.

Best regards,

Dave
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