This linear ball bearing carries load through recirculating ball tracks that run along a shaft, converting sliding motion into rolling contact. The KH06-PP is sealed on both sides, protecting the ball tracks from dirt and moisture while retaining the initial grease fill applied at the factory. Net mass of the unit is 7.3 g, corresponding to a compact bearing size intended for light linear guidance duty. The double-side sealing combined with a relubrication facility allows grease to be replenished once the initial fill is used up, without needing to remove the bearing from its housing. Since it ships pre-greased, it can be mounted and put into service without additional lubrication beforehand. The sealed construction keeps contaminants away from the balls and track surfaces, supporting steady, low-friction travel along the shaft over repeated cycles.