Thread: Diamond Tool Holder

Hi Chris,

Thats what I meant by "why didn't", I wouldnt have expected to see them around now(though Phils link shows people are still thinking about them)but what I was getting at is as you say "why didnt they take off 134 years ago?" when labor was cheap and tool steel expensive. Thank you for the picture, seems the "adjustable angle" I was thinking about has been done already. Even says the holders pay for themselves in 9 months, though they are comparing them to carbon steel tools not HSS(I think)

Hi Fred,
Yes something like that.

Stuart

Originally Posted by Big Shed

Yes, the cost seems high for what is after all a fairly simple tool holder.

I recall one or two people on this forum making their own version and being roundly criticised for doing so as it was patented?

That is interesting. There is no law against making your own for your own use. I was looking at making one myself but decided it was too hard considering I did not have a mill at the time etc etc. I finished up buying one.

Another reason for them not being used in industry is that they are only available in small sizes. I bought the largest size and that looks pretty small in my tool post.

Dean

Did everybody miss post #59 lol

Phil

Originally Posted by Stustoys

I wouldnt have expected to see them around now(though Phils link shows people are still thinking about them)

Originally Posted by Steamwhisperer

Did everybody miss post #59 lol

Not I
But I didnt that thanks, so "thank you for the link Phil"

Stuart

Are you talking about the "name" of the iscar holder only.
Those tools use that name and hold a fixed indexable insert,not an adjustable piece of HSS.

Originally Posted by pipeclay

Are you talking about the "name" of the iscar holder only.
Those tools use that name and hold a fixed indexable insert,not an adjustable piece of HSS.

Hi Pipeclay,
not sure who you are asking but if it's me, I'm talking about tangential tooling. Iscar make a range of it as shown in that link.

Phil

ps as if your eyes would let you miss anything Stuart

Originally Posted by Steamwhisperer

Hi Pipeclay,
not sure who you are asking but if it's me, I'm talking about tangential tooling. Iscar make a range of it as shown in that link.

Phil

ps as if your eyes would let you miss anything Stuart

I am with Stuart with this one. All I saw in that link was insert tools but I did not look closely at each one.

Dean

Hi Dean,
In the bit of writing below they refer to them as tangential.

Phil

When I looked at the Iscar page I initially thought the tangential inserts were an uneconomical two cornered design. While close inspection isn't a feature of that site, in reality the inserts must flip over to provide 4 corners.

A quick leaf through the new 2013 Kennametal catalogue shows nothing similar, all their turning inserts are top fixed.

HHS and Diamond Tool Holders are a means to keeping shed life simple because carbide and its selection are anything but.

BT

Originally Posted by Steamwhisperer

Hi Dean,
In the bit of writing below they refer to them as tangential.

Phil

Gotcha now Phil.

Bob.

As I am sure you know, only inserts with zero relief angle can be flipped. The ones I use for my main cutting (RH) has zero relief and is an 80 degree diamond so has 4 points. These are the type of tips that came with my holder and I have continued to use the same ones.

I am enjoying this thread as reading a company website is nowhere near as informative.

Dean

This company makes beautiful boring tools..... I have a few.... their factory is only 10k from where I once lived....

But they also make a nice range of tangential turning tools, with a selection of HSS or HSS-Co or carbide tipped blades. And not that much more expensive than the tool this thread is about:

Ifanger AG » System Ifanger

Chris

Originally Posted by cba_melbourne

This company makes beautiful boring tools..... I have a few.... their factory is only 10k from where I once lived....

But they also make a nice range of tangential turning tools, with a selection of HSS or HSS-Co or carbide tipped blades. And not that much more expensive than the tool this thread is about:

Ifanger AG » System Ifanger

Chris

I can attest to how nice they are.

https://www.woodworkforums.com/f65/ta...9/#post1331653

Hi,

My DTH's turned up today. Was very keen to get started with them.

I ground the first HSS bit and put it into the holder and on the lathe. I had some horrible 1" black bar that I have heaps off already in the headstock. So I gave it a turn, the results weren't much different to my carbide (I didn't really expect much).

I then put in some bright bar offcut - I don't know what it is, I can't even remember where I got it from but it is hard and machines well.

The first cut I did with the DTH was pretty good, better the carbide. It was a 0.2mm cut at the lowest speed and feed (690rpm I think). I also face cut it, which turned out well.

I then decided to do a carbide cut in comparison, the finish wasn't that great. Highest speed (1200rpm).

So went back to the DTH, that's where the problems started.

I took a 0.2mm cut at a higher speed (about 800rpm), totally blunted the HSS. I re-ground the HSS, to no effect. So then I turned the HSS bit around and started again and put a small radius on the cutting edge.

Better results, I also reduced the speed back to the lowest. So I tried something different again. Increased the speed up one and took another 0.2mm cut, good results. Upped it again by taking a 0.6mm cut at the same speed. Not so good, chewed the HSS bit apart and terrible finish - see the photo's of the HSS in the DTH and my hand.

Had to call it quits there, the grinder is too loud for my garage.
So I guess don't take too big a cut and don't go too fast. I wonder is coolant would make a big difference (I don't have a coolant pump so it would be by hand). Also, my grinder is a Chinese POS that I know regret buying. I'll take my DTH jig and HSS bits to work and give them a touch up.

Here are some photo's. Taken by mobile phone so quality isn't that good.

Cheers Ben.

ps - I also found it hard not to discolour the HSS when grinding, went pretty slow and cooled it in water often.

Ben,
Looks to me like you've overheated the HSS bit. I took it really slow grinding mine with frequent dips in water. Mine has no discolouration at all. I assume you are using the high chromium M42 HSS that comes with the DTH?

I've managed to knock the tip off mine a couple of times by being too aggressive. At least it's easy to repair.

Chris