Heavy duty linear ball bearing for SJ-20 and 45 degree slant bank design. The slides in the X and Z axes are heat treated to increase stiffness and have a SJ-25/30/35 30 degree slant bank design. The hydraulic turret, which uses a Japanese conical coupling, provides serial and smooth indexing. The “I” slides 6 provide the contact surface and provide a high level of stiffness.