NSKTAC Series of Ball Screw Support Bearings for High-Load Applications - 25TAC62CSUHPN7C

Standard Series and Special Bore Diameter Series of Ball Screw Support Bearings for High-Load Applications

NSKHPS™ Angular Contact Thrust Ball Bearings of Ball Screw Support Bearings for High-Load Drive Applications

High-capacity bearings used for supporting ball screws operating under high loads typically adopt large- diameter steel balls in order to ensure sufficient high capacity and to reduce the number of rows of combi- nations. With the development and commercialization of the special bore diameter series, which has the same load rating as that of the standard series but with a smaller bore diameter, users can maintain equiva- lent high-capacity performance with a smaller diameter of screw shaft end without changing the number of rows. 

Extended bearing life and higher axial-load capacity
Limiting axial load has increased by 5 times compared with that of conventional bearings. Bearing life has increased by 3 times compared with that of conventional bearings.
Special bore diameter series facilitates downscaling of screw shaft end
Easy handling by means of universal matching
Extended bearing life and higher axial-load capacity
Longer bearing life and higher axial load capacity have been achieved by optimization of the bearing’s internal design, thus enabling the reduction in number of combined rows.

• NSKTAC Series of Ball Screw Support Bearings for High-Load Applications

 Dynamic equivalent load

  Angular contact thrust ball bearings for equipment such as electric injection molding machines are subjected to extremely large axial loads (Fa) in comparison to radial loads (Fr). Therefore, the dynamic equivalent load P of the support bearing is obtained by the following formula regardless of the number of rows: P is 0.81 Fr + Fa

Multi-row combination calculations

These have been calculated by multiplying the coefficients in the right table for preload coefficient, axial rigidity and starting torque.