MetalworkingFun Forum

While cleaning off the last of the shelves I set aside a bag of carbide inserts to check out next time I took a break. I got these inserts with my mini-lathe. The guy I got it from threw in all sorts of tooling. Back to the inserts. There are two different types, SNMA-433 and SPG-433. Some Morse, some Interstate and some HTC. The only difference I see (haven't done too much comparing) is the SNMA has a hole in the center whereas the SPG is solid. Does anyone know what kind of tool do these go into?

sounds like square milling inserts

Milling wouldn't surprise me, they're 0.185" thick. Now to determine what tool holder and if it'd be worth it to buy the tool or off the inserts. I have about 30 in total (more without the hole than with).

SNMA-433

S = square
N = negative rake
M = dimensional tolerance of the insert
A = center hole for a clamp fastener
4 = 1/2" inscribed circle insert
3 = 3/16" thick
3 = 3/64" edge radius

SPG-433

S = square
P = 11 degree positive rake
G = dimensional tolerance of the insert
4 = 1/2" inscribed circle insert
3 = 3/16" thick
3 = 3/64" edge radius

Those inserts require a tool holder with a 3/4" shank. You'll need a tool holder for the SNMA of this type.

https://www.toolhit.com/collections/turn...srnr-12-4b

Hope this helps some.

Ed

Yes it does. Also Shars shows 3 for the mill with an R8 shank. The 3 are different sizes and number of flutes - 3, 4 and 5. So I guess if I'm going to keep these things I've got some tooling to buy. Hmmm. Decisions, decisions...

Can you post a pic of the milling cutters. I suspect they will be the type that will hammer your spindle bearings to death. If that is the case it will be better to offload the inserts.

Not much to look at. Here's a pic from one on ebay. The only difference is mine are gray.

I have a China made face mill that uses gray ones ,looks almost identical to the ones you posted pics of.

I have a face mill that uses them too. Not as smooth as a Walter but more cost effective to operate.