Acme Ultimate Bushings are the answer!
Acme Ultimate bushings are Titanium Nitride (TiN) coated for longer life. Titanium Nitride coated bushings have a hardness of 82-85 RC. This increase in surface hardness means the bushings can stand the abrasive wear of tools and chips for much longer periods of time and are less brittle than regular carbide bushings.
The TiN coating on Acme Ultimate Bushings has a very slippery surface. This slippery surface on the I.D. of the bushing will help increase tool life.
The greater the number of bushings needed for an application, the more Acme Ultimate Bushings can reduce your cost.