Milling Inserts and Boring/Turning Inserts

[Braveheart13]

I noticed that we only had one insert for our boring bar at work and went on MSC to order more. When I found the page with the different categories on inserts, I noticed that there were Boring Inserts and Milling Inserts. I know that they both come in all shape and sizes, but both do come in the triangular shape that I was needing. Now I ordered the right one, but I got to wondering, what is the difference in those two type of inserts? And are they interchangeable?

 

[Cadillac]

Numbers,letters,pics?

 

[BaronJ]

Generally speaking, both yes and no ! Insert technology has come on in leaps and bounds in recent years. What has happened is that inserts have become more and more specialised. A different insert for each material type, different nose radius for different cuts and speeds. Almost to the point of a particular insert for every type of job.

So whilst from a hobbyist point of view they may be interchangeable, not from a commercial one !

 

[benmychree]

Generally, I'd think that a milling insert would be more impact resistant than a turning/boring insert.

 

[mmcmdl]

I have my Valenite handy reference in front of me now . I've had this for 30 years minimum . At that time they had more than 2200 insert sizes and over 6400 insert selections . Multiply that by how many companies are now selling cutters ! Buy the size insert your tooling calls for and the grade suited for the material . Edit ........since 1983. Tool seats and clamps very , chip breakers , clearance , tnr , different grades etc etc etc .

 

[benmychree]

Back in the day, it was easier; only perhaps 1/2 dozen manufacturers and a dozen grades for each one.

 

[Bob Korves]

Internal tools like boring bars need more clearance below the cutting edge than external tools do.

 

[benmychree]

Back in the day, it was easier, Kennametal, Vascoloy/ Ramet, Valenite, Krupp Widia. and several others, with a dozen grades, or so -----
Krupp was the inventor of carbides, one of those accidental earth shaking discoveries; they "invented" it as a material for wire drawing dies, and a worker took a broken die and sharpened it into a cutting tool and tried it out, the rest is, as they say, history.

 

[benmychree]

Krupp called it "Widia metal"; translation,
"like Diamond".

 

[benmychree]

Internal tools like boring bars need more clearance below the cutting edge than external tools do.

But then, TP inserts have the same clearance for turning and boring ---