This linear ball bearing provides guided linear motion through recirculating ball tracks, allowing smooth axial travel along a shaft. It comes pre-greased from the factory and features sealing on both sides, which keeps the internal grease in place and prevents ingress of contaminants during operation. Net mass is 65.6 g. The design includes a relubrication facility, allowing fresh grease to be added without disassembly once the initial fill is depleted. The double-side sealing makes KH25-PP suitable for applications where the shaft runs in an environment with dust or debris, protecting the ball tracks from external contamination. Since relubrication is possible through the built-in facility, service intervals can be maintained without removing the bearing from the shaft, which simplifies ongoing maintenance of the linear motion system.