Boring bar insert help

[springer]

Hello, been a while since I've been on here, but I need some help.

I have a kennametal carbide boring bar, C08-STUNR2 is the only identification on it

Does anyone know what insert it uses? I cant find anything from kennametal or Google really.

Any help would be appreciated.

Thanks

 

[darkzero]

My Google fu came up with T221P

https://www.mscdirect.com/product/details/63433411

E08-STUNR2

https://www.mscdirect.com/product/details/48594022?orderedAs=E08STUNR2&pxno=16880933&refnum=16880933&rItem=48594022

Don't know what the difference between C & E is but according to their catalog it looks like it denotes lead angle?

A08-STUNR2 is 5° lead angle, E08-STUNR2 is 3° lead angle, both use T221P inserts. C is not listed in their catalog.

 

[springer]

Thanks darkzero. Doeant seem like a very popular insert, old obviously. I found some on ebay to give them a shot. Wonder if a tcmt would work at all.

 

[mksj]

TCMT will probably not work, the hole diameter is .173 and uses a chamfered edge to lock it in with the retaining screw. The T221 is a 0.095" and uses a flat head retaining screw. Slight differences in thickness and there may be a difference in the edge relief angle, the T221 is a positive rake the TCMT is a neutral rake. This will effect cutting clearance. Might be possible to use a TPMT221 but you would need a different insert retaining screw. T221P inserts are pretty inexpensive on eBay, examples below:

T221P KC850 Carbide Misc Insert 10pk Kennametal | eBay

T221P KC850 Carbide Misc Insert 5pk Kennametal. Condition is New. Shipped with UPS Ground.

www.ebay.com

Kennametal T221P Carbide Inserts Grade K68 10pcs for sale online | eBay

Find many great new & used options and get the best deals for Kennametal T221P Carbide Inserts Grade K68 10pcs at the best online prices at eBay! Free shipping for many products!

www.ebay.com