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Diamond shaped inserts CCMT0602XX

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Andrew Tinsley29/11/2020 21:52:05
1262 forum posts

I normally use HSS lathe tooling, but I have some of Arc's indexable tooling that takes the above inserts. I use them for hard spots in castings and similar nasties.

Using Arc's.holders, you only use 2 out of the possible 4 cutting points. Being a cheapskate, can anyone recommend an alternative holder that would use the other two cutting points?


Roderick Jenkins29/11/2020 22:05:54
2009 forum posts
533 photos

J B cutting tools


peak429/11/2020 22:21:54
1328 forum posts
148 photos

Greenwood list some rather more expensive ones, though I've no experience personally of either.
Watching this tread with interest as I was thinking about investing myself.

See also 3rd post down from John Haine on this thread, so maybe worth a PM if he doesn't respond on this topic here.


Roderick Jenkins29/11/2020 23:00:56
2009 forum posts
533 photos

good finish 2.jpg

They work!


Clive Foster29/11/2020 23:06:11
2540 forum posts
83 photos

I have a similar, albeit larger, holder for the inserts I (sometimes) use.

Gets very little use because I can't be bothered turning the tool-post to 75° so the leading edge is almost perpendicular to the cut allowing the insert to come close to steps. As is it's only really useful for facing a full face One day I shall chop the end off and weld it back on at the right angle. But frankyl its a cumbersome lump.

In my view angles belong on the tools not on the tool-post or top-slide. My Dickson QC styles stay locked at 90° to the bed and the top-slides at 25° angle off perpendicular unless the job is totally weird. If you don't have a rear tool-post the tool-post needs to be put back to 90° for parting off anyway. Switching back and forth between 75° to use the other corners and 90° to part off will get old real fast. Even if, like me, you have a very fast method of re-setting alignment.


Niels Abildgaard30/11/2020 04:33:41
369 forum posts
150 photos

A maximum rigidity CCMT holder was described many years ago:


JasonB30/11/2020 07:10:21
19603 forum posts
2150 photos
1 articles

Clive, Like Rod, I've got a right hand but also a Left hand one from JB Cutting tools no need to turn the toolpost it stays square on. If using the R/H to turn a diameter then it works fine on through cuts and if upto a shoulder then use it to rough out before changing to th eusual SCLCR type to finish.

Good for roughing out and also attacking castings where the obtuse corner is a bit more durable

As Rod says they work

Edited By JasonB on 30/11/2020 07:13:27

DiogenesII30/11/2020 08:03:07
174 forum posts
78 photos

..another satisfied user of the JBTholder as per Rod & Jason.. ..they work well on the ML, and I do have to say that carbide insert tooling is what's in the toolpost for a rapidly increasing majority of general turning work that I do.. ..if you haven't yet tried CCGT inserts, I really would suggest buying a couple of those to trial in your existing holders as well..

Michael Gilligan30/11/2020 09:54:46
17075 forum posts
762 photos
Posted by Niels Abildgaard on 30/11/2020 04:33:41:

A maximum rigidity CCMT holder was described many years ago:



Thanks for that excellent link, Niels yes


Peter G. Shaw30/11/2020 10:47:41
1232 forum posts
44 photos (no connection other than a satisfied user) also supply tool holders along with pretty pictures to help identify what you need. SCBCR/L is the tool required. The tool holders are, in my opinion, a bit on the short side, but they do work.

Peter G. Shaw

Clive Foster30/11/2020 12:06:04
2540 forum posts
83 photos

This is an industrial size version. Albeit pin retained rather than screw.

ccmt obtuse r.jpg

Picture shows right hand rough turning configuration, which leaves a 70° ish shoulder, in a Dickson style holder. Flip the tool and mount parallel to the bed for facing.

Possibly the most generally useful single tool holder for using up the obtuse corners. I always have plenty of obtuse edges to use up so no qualms about showing it to a horrible piece of material or heavily skinned cast iron.

That said there is a very strong case for suggesting that CCMT inserts and the normal right hand holder and left hand obtuse corner exploiting holder shown in Jasons video are an ideal "introduction to carbide" starter set. Indeed, like Diogenes, I'd advise that this pair be pretty much at the top of the shopping list, along with a carbide parting off blade, for any beginner wishing to start out with modern tooling from the get go.

A big thank you to Jason for being willing to quickly post videos of the modern way to deal with potential problems when exploiting modern tooling in the home shop. This antediluvian workshop penguin has plenty of experience in how frustrating less than optimal tooling choices can be but several lifetimes supply of old tech gear means no modern experience for direct assistance.


Andrew Tinsley30/11/2020 19:01:50
1262 forum posts

Thanks to all who took the time to answer my query. I now have an order with JB Tools.

Thanks again,


Howard Lewis01/12/2020 17:34:37
4177 forum posts
3 photos

I use a Greenwood Tools holder to use the 100 degree corners, mostly for roughing, but often get a good finish anyway.

Having been able to get two more lives out my worn / chipped tips means that the holder has probably paid for itself by now!


David George 102/12/2020 22:42:00
1434 forum posts
459 photos

This is my 10 mm cutting stainless from JB CUTTING TOOLS


Edited By JasonB on 03/12/2020 06:53:27

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