Thread: Vintage Purchases

Hi Dean.

Are the threading inserts and holders from T-Carbide on Ebay as you mentioned in an earlier post.

I'm looking to purchase a variety of indexable tools and wonder what the quality is like.

John

Originally Posted by GuzziJohn

Hi Dean.

Are the threading inserts and holders from T-Carbide on Ebay as you mentioned in an earlier post.

I'm looking to purchase a variety of indexable tools and wonder what the quality is like.

John

For your lathe John, I would be firstly getting a trigon inserts... I run 20mm shank tools that use trigon shaped WNMG0804** inserts... The ** is the insert nose radius and I use 04 and 08.... The bigger the nose radius the stronger the insert is 04 is bigger then 08, but the bigger depth of cut you need to take to get a decent finish... They are negative rake inserts so they have cutting edges each side..

When it comes to what sort to buy, the last lot I bought were Korloy's I think.... Just watch what grade you buy as that will also dictate how long the inserts last... You want a tough insert for things like interrupted cuts and the like... A hard insert for hard materials but the insert will be brittle and just break if you tried an interrupted cut....

I also have DNMG inserts both in left and right hand, they are pretty brittle at the best of times... Small nose radius and light cuts but easy to get very good finishes...

Along with some SNMG holders that seldom get used...

The WNMG's holders do 70% of the external cutting, they also come in boring bars in various approach angles...

On top of that I have a variety of brazed on tools and the usual HSS tools... And threading tools....

Parting off I use a 5mm wide insert blade tool.

This is all on my 17" lathe.

I have not really tooled up the 10EE yet but that tooling described above would be too big for it...

Originally Posted by GuzziJohn

Hi Dean.

Are the threading inserts and holders from T-Carbide on Ebay as you mentioned in an earlier post.

I'm looking to purchase a variety of indexable tools and wonder what the quality is like.

John

Yes they are the ones. I haven't used them yet, but to the eye they look pretty good. The external came with a spare shim and both have spare screws. This I think is a bonus. When you fit the replacement get a new one and never be without.

There are a few choices with different numbers of inserts. I shuffled around and got 15 ER and 10IR. I hope this will do me for a long time. I think it was 10 ER with the tool and 5 IR with the tool and I bought a pack of 5 each. I hope the inserts are reasonable quality.

I bought a smallish internal tool so I could do smaller diameter. If I need to do bigger diameters I will just go slower. The external is 25mm. I should try it tomorrow. I am hoping it will be dead on centre height without shims. This is my idea of a poor mans QCTP. I plan to have the shims with each tool to get the right height. At this stage I have decided a QCTP is just too much money for what is just a hobby. Then you have to keep buying holders. The CA size to fit my lathe comes at a serious cost. I can buy lots and lots of tooling for that. I could hang an electric drill with a 10mm hex above on a spring and use it to do/undo the clamp bolts like a poor mans auto drawbar.

Speaking of drawbars, the 50mm boring head could only be supplied with a maximum of an MT3 arbor, which has an M12 thread. This means I now have to make up another drawbar. I will have M12, M14 and M16.

Dean

Trigon would be good. I decided against them because I already have some CNMG tooling. With the right insert they will take some serious hammering. Identical angles, but 6 cutting tips instead of 4. The trygon was supposed to take the machining world by storm. CNMG was the most widely used insert in the world. Trygon was going to knock it off the throne. It didn't happen. I guess it was a bit like my position. Junk the existing tools and start from fresh with everything? Huge cost for industry.

I have not really tooled up the 10EE yet but that tooling described above would be too big for it...

Umm, what tooling described above? One of the sets of countersinks has a 6mm one. It is cute. Would that fit the 10EE?

Dean

Originally Posted by Oldneweng

Umm, what tooling described above? One of the sets of countersinks has a 6mm one. It is cute. Would that fit the 10EE?

Dean

I meant the ones I described, the 20mm shank tools...

Originally Posted by .RC.

I meant the ones I described, the 20mm shank tools...

Ok. What size tooling does the 10EE take. I was under the impression it was bigger.

Dean

I'm a die hard fan of CNMG inserts, All my holders (over 25 of them) are 25 X 25mm shank and I'm not about to scrap them all.
I do have a rough assortment of different style tip holders, but I just don't seem to reach for them. If I need something different to CNMG I usually reach for the HSS or Brazed.
Just my 2c

Originally Posted by Oldneweng

Ok. What size tooling does the 10EE take. I was under the impression it was bigger.

Dean

16mm shanks would probably be optimal for it... I can run 20mm shank tools in the holders, but you waste the insert as you cannot take the DOC to use all the insert..

Originally Posted by Oldneweng

Yes they are the ones. I haven't used them yet, but to the eye they look pretty good. The external came with a spare shim and both have spare screws. This I think is a bonus. When you fit the replacement get a new one and never be without.


I bought a smallish internal tool so I could do smaller diameter. If I need to do bigger diameters I will just go slower. The external is 25mm. I should try it tomorrow. I am hoping it will be dead on centre height without shims. This is my idea of a poor mans QCTP. I plan to have the shims with each tool to get the right height. At this stage I have decided a QCTP is just too much money for what is just a hobby. Then you have to keep buying holders. The CA size to fit my lathe comes at a serious cost. I can buy lots and lots of tooling for that. I could hang an electric drill with a 10mm hex above on a spring and use it to do/undo the clamp bolts like a poor mans auto drawbar.

Dean- I'm looking forward to hearing how they perform

I can relate to the QCTP prices. I picked up a Dickson S3 for my lathe. It only came with 1 toolholder. It's still better than shimming each tool.
The price of additional ones is frightening. Making a batch of holders will be a project for when I have a more equipped workshop.

Originally Posted by .RC.

For your lathe John, I would be firstly getting a trigon inserts... I run 20mm shank tools that use trigon shaped WNMG0804** inserts... The ** is the insert nose radius and I use 04 and 08.... The bigger the nose radius the stronger the insert is 04 is bigger then 08, but the bigger depth of cut you need to take to get a decent finish... They are negative rake inserts so they have cutting edges each side..

When it comes to what sort to buy, the last lot I bought were Korloy's I think.... Just watch what grade you buy as that will also dictate how long the inserts last... You want a tough insert for things like interrupted cuts and the like... A hard insert for hard materials but the insert will be brittle and just break if you tried an interrupted cut....

I also have DNMG inserts both in left and right hand, they are pretty brittle at the best of times... Small nose radius and light cuts but easy to get very good finishes...

Along with some SNMG holders that seldom get used...

The WNMG's holders do 70% of the external cutting, they also come in boring bars in various approach angles...

On top of that I have a variety of brazed on tools and the usual HSS tools... And threading tools....

Parting off I use a 5mm wide insert blade tool.

This is all on my 17" lathe.

I have not really tooled up the 10EE yet but that tooling described above would be too big for it...

Richard- Thanks for the advise. Without taking Deans thread too far off topic do you recommend any particular supplier of holders CTC etc.
I had planned to try the ones from Dale Tools who appeared briefly but seems to have disappeared (no stock on website).

You could always make yourself a QCTP.
It would be a really good project, and you would get to use all your new tools to do it.
There are plenty of plans online available.

Matt

I looked at Dale Tools for the threading holders but Dale did not answer emails. I looked at CTC for a qcth. Seemed to be about the best price. I also looked at making one but the prices I got for the steel alone was unbelievable. That's why I am going to stick with the shims.