Browse Categories

Need Help?

Enter Code "FreeGround" at checkout for Free Ground Shipping on orders of $150 or more.
(Valid only on orders placed on the website.)

Co-Bore Cobalt Boring Bars

Made in USA by APT.  Made of premium cobalt high speed steel in a one piece construction, these boring bars may also be modified to a special grooving tool to produce various internal shapes and radii.  Cobalt is an ideal tool material because of its high red hardness, abrasive resistance and ability to maintain a sharp edge.  In addition, cobalt is used successfully to significantly extend tool life.

3/8" Shank
1/2" Shank
5/8" Shank
3/4" Shank
Shopping Cart
Your cart is empty.

4 Credit Card Logos


Mailing Lists