With a 40º angel, this 7006 Angular contact bearing is fit for an application with thrust load. The precision rating is an Abec-5. The single row angular contact bearing was designed to support heavy thrust loads in one direction. The thrust capacity increases with the contact angle. The dimension for the 7006 bearing are 30mm x 55mm x 13mm. The bearing is composed of 2 chrome steel races, phenolic cage, and Silicon Nitride Ceramic Si3N4 ball bearings for less friction; less heat, therefor longer life.
The 7006 angular ball bearings can replace the 6006 deep groove bearings, much better performance in terms of speed and rigidity of the machine, no wonder CNC machines only have angular contact bearings, read more at http://www.vxb.com/page/bearings/PROD/Kit8153