Thread: Tool holder I.D. ?????

Hi

I was reading Harold Halls write up on making the plug gauges for his chuck and backing plate projects

He uses a particular brand of tool holder and insert for the threading

Does anybody know the brand of the tool holder and the insert he is using ?

Mike

Looks like the Glanze external threading tool and insert.

New Glanze Indexable Threading Tools and Sets

I have a set ofexternal and internal Glanze threading tools.

Originally Posted by Big Shed

Looks like the Glanze external threading tool and insert.

New Glanze Indexable Threading Tools and Sets

I have a set ofexternal and internal Glanze threading tools.

THANKS BUT IT LOOKS MORE LIKE THIS



SET OF Imperial External Lathe Threading Tools 16mm Shank | eBay

Originally Posted by morrisman

THANKS BUT IT LOOKS MORE LIKE THIS



SET OF Imperial External Lathe Threading Tools 16mm Shank | eBay

I think you'll find that is the Glanze set, Chronos sell a lot of Glanze tools, I bought mine from there.

I am not up on inserts, but I am sure Bob posted one last week similar to it. It is my understanding they are called full form inserts as they only do one (or a limited number) of threads per inch.

Is there a reason why you don't just use HSS, or are you turning hardened steel?

Dave

Originally Posted by Big Shed

I think you'll find that is the Glanze set, Chronos sell a lot of Glanze tools, I bought mine from there.

Fred how do you go with replacement inserts? I find I tend to occasionally chip carbide when threading, much more so than with regular turning, and am looking for a new tool holder with inserts that are readily available.

Pete

Originally Posted by Pete F

Fred how do you go with replacement inserts? I find I tend to occasionally chip carbide when threading, much more so than with regular turning, and am looking for a new tool holder with inserts that are readily available.

Pete

I bought extra inserts when I bought the holders, I haven't had to replace one yet. But they are readily available from Chronos and their delivery is always prompt. Have bought several things from them and always had quick service and delivery.

That style is generally called a laydown threading insert. Lots of companies do them. Using that term will help you find them.

They come in full form, and general vee styles. The full form ones make threading a breeze. You just leave your stock slightly oversize 0.05 - 0.1, and keep cutting until your diameter starts to reduce. You just micrometer that, then finish to the major diameter. Provided you haven't worn or chipped the insert your depth and form would almost pass inspection. You can get them in odd ball stuff like Acme and Trapezoidal as well.

I traded off a few hour service call at one of my repetition companies, for a box full of mixed pitch internals and externals. They really make thread cutting half as hard as it used to be.

Regards Phil.

Phil, at the risk of sparking controversy, do you set the compound across at 29 degrees with these inserts or plunge in square (compound parallel with the bed)?

Michael

Originally Posted by Dave J

I am not up on inserts, but I am sure Bob posted one last week similar to it. It is my understanding they are called full form inserts as they only do one (or a limited number) of threads per inch.

Is there a reason why you don't just use HSS, or are you turning hardened steel?

Dave

Hi Dave

Harold writes in his article , the single point HSS tools don't give the correct form of the thread e.g., you have to compensate for the 'pointy' form of the HSS tool . Harold can be very pedantic at times and rave on but I think he is correct most of the time !

It's all in the grinding and stoning. For threads that need it I just use my my eye loupe (about $3 off ebay) and round it off.

A lot of the time I will off set or angle my tool bit grinding to get in close to a shoulder etc.

Dave

the same set is available here ..looks to be Asian to me ...It must be reasonable quality otherwise Chronos wouldnt sell it ..maybe MIKE

AT LEAST THESE SETS ACCEPT A STANDARD INSERT , UNLIKE SOME

7PCE Internal External Thread Insert 10mm Tool Holder Free Postage | eBay

Certainly looks similar, can't find the separate inserts in his listings though?

I have a Glanz boring bar, certainly no iscar but it was cheap. The inserts (diamond shape, maybe 70 or 80 deg point) that came with it were crap, and the torx bit broke off the first time i used it.....I think they are made in India.
Personally i have never used a carbide threading tool, the only problem i have had with HSS was threading silver steel and the trailing edge pushing metal up onto the ridge causing the ID to grow. Only happen with the O-1 though, not on anything else.
If i was to buy some i would look at CTC.
Cheers,
Ew

Originally Posted by Michael G

Phil, at the risk of sparking controversy, do you set the compound across at 29 degrees with these inserts or plunge in square (compound parallel with the bed)

At the risk of getting burn't at the stake. I havn't turned a compound around since I was an apprentice. H.S.S or the newer carbide form tools. I just plunge cut.

At the end of the day, speaking of these thread form tools. The forms ensured when the leading edge, trailing edge and crest are cutting. In CNC thats mostly the G76 function. That does a Z axis offset getting to depth, but the final spring cuts are at depth.

Wasn't it John Stevenson that ripped his entire top slide off and replaced it with solid mount. He does alot of threads. All of them must be staright in.

Regards Phil.