Carbide Inserts

[Vinny]

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?

[dallen]

sounds like square milling inserts

[Vinny]

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).

[EdK]

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

[Vinny]

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...

[Mayhem]

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.

[Vinny]

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

[Pumpjack]

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

[f350ca]

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