Can anyone identify this insert?

GaryK

GaryK

In Memory
Rest In Peace
I got these from where I worked in 1989. It's not carbide and I seem to remember them being made from some kind of titanium.

Here is a picture of a carbide (left) and unknown (right)

IMG_1663 (Large).JPGIMG_1664 (Large).JPG

The carbide weighs 3.9 grams and the unknown weighs 2.1 grams.

They seem to last forever.

I remember using them to take .100 passes in O1 tool steel using a 2" indexable endmill full width pass as fast as I can turn the handle!
It was loud and you can feel it in the floor, but it did it all day long in the same edge.

I've used these 10 I have off and on for 20 years and they are finally beyond use and I'm trying to source them.

Anyone know anything about them?

Gary

IMG_1663 (Large).JPG IMG_1664 (Large).JPG
 
Gary, you did not provide any sizing but they look like TPG's. I use them on several different face mills. They are very tough, with no chip breaker the edge holds up very well. I tried some from Enco (Interstate) but found that the edge on these did not hold up. I am currently using a box from Kyocera with excellent results. I usually get my from one of the Ebay sellers.

Jim
 
JimSchroeder said:
Gary, you did not provide any sizing but they look like TPG's. I use them on several different face mills. They are very tough, with no chip breaker the edge holds up very well. I tried some from Enco (Interstate) but found that the edge on these did not hold up. I am currently using a box from Kyocera with excellent results. I usually get my from one of the Ebay sellers.

Jim
Click to expand...

Sorry, I didn't think that it mattered. Yes, it's a TPG-322. Those Kyocera are carbide though, right?

I'm using it in a Tri-Dex 1 1/2" cutter

0312282-23.jpg

0312282-23.jpg
 
Well, found something interesting, not sure if it is an answer though. Wikipedia has a reference to "Titanium Carbide", which fits with your recollection of them being made of titanium. I don't recall ever having seen them for sale before though

http://en.wikipedia.org/wiki/Cemented_carbide

I found a few on Ebay, but havn't seen any new ones advertised as being made of the stuff
 
DMS said:
Well, found something interesting, not sure if it is an answer though. Wikipedia has a reference to "Titanium Carbide", which fits with your recollection of them being made of titanium. I don't recall ever having seen them for sale before though

http://en.wikipedia.org/wiki/Cemented_carbide

I found a few on Ebay, but havn't seen any new ones advertised as being made of the stuff
Click to expand...

That is the coating not the material itself. I don't think these have any coating.



OldMachinist said:
Likely they are ceramic like these.
http://www.ebay.com/itm/20-NEW-KENN...526?pt=LH_DefaultDomain_0&hash=item35c1987bbe
Click to expand...


I have checked out ceramic inserts before. I don't think that's it. Ceramic can be brittle and these inserts are anything but brittle.
 
They do talk about titanium carbide coating, but also about titanium carbide substrate (last paragraph in the "Composition" section).

Course, they could be a different grade of tungsten carbide. Carbide inserts are not solid tungsten carbide, they are tungsten carbide in a hardmetal binder (usually cobalt), and the concentrations vary. I'm stretching on that last part though.
 
Gary, good question "are they carbide". I do believe they are, they certainly look like carbide and perform like carbide. Sometimes when you get this stuff from eBay its obsolete so trying to research it is difficult. The Kyocera ones that I currently use appear to be uncoated. If they are coated the coating has the appearance of raw carbide.
Jim
 
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