This linear ball bearing enables low-friction linear motion along a shaft, using recirculating ball tracks in a closed housing design. The bore diameter is 25.0 mm, outside diameter 40.0 mm, and net mass 0.135 kg. It belongs to the lightweight range and is sealed on all sides, protecting the ball tracks from contamination while retaining lubricant inside the unit. The design includes a relubrication facility, allowing grease to be replenished without disassembly, which extends service intervals. The adjustable angle feature accommodates slight misalignment between the bearing and shaft during mounting, easing installation where perfect alignment cannot be guaranteed. Full sealing on all sides makes it suitable for linear motion applications where dust or debris ingress needs to be minimized.