This linear ball bearing enables low-friction linear motion along a shaft, with recirculating ball tracks carrying the load. It is sealed on both sides, protecting the rolling elements from dust and moisture while retaining the initial grease fill inside the unit. Net mass is 94.7 g. The bearing includes a relubrication facility, allowing grease to be replenished during service without disassembly, which extends the intervals between maintenance stops. The double-side sealing combined with initial greasing makes it suitable for continuous linear travel applications where contamination ingress must be limited and where periodic relubrication through the built-in facility keeps friction and wear stable over the operating life.