PMK BSRN-TN / BSRN-LTN bearings are precision needle-roller and axial cylindrical-roller assemblies developed for high-accuracy screw-drive and spindle applications. These bearings combine double-direction axial cylindrical rollers with radial guidance through a needle-roller bearing, achieving a compact design, high rigidity, and excellent load support.

They are particularly suitable for high axial loads and tilting moments common in feed-drive and actuator systems. Axial preloading can be applied using a precision locknut to ensure stable performance and minimal axial displacement.

Key benefits

• Precision bearing arrangement designed for screw-drives and motion systems requiring high stiffness.
• Double-direction axial cylindrical-roller arrangement, radially guided through a precision needle-roller bearing.
• Suitable for heavy axial loads and moderate tilting moments in compact assemblies.
• Axial preload can be applied easily using a precision locknut.
• Can be used where the locating washer support is insufficient or where a seal-raceway must be generated.
• Corresponding precision locknuts available upon request for controlled preload.

Applications

• Ball-screw and feed-drive support in CNC and precision machinery.
• Linear actuators and positioning systems requiring compact combined bearing support.
• Machine-tool and robotics assemblies with high axial and tilting loads.
• Preloaded spindle supports for precision motion control.