This linear ball bearing enables low-friction linear motion along a shaft, using recirculating ball tracks in an open, machined design. Bore diameter is 25.0 mm, outside diameter 40.0 mm, and net mass is 0.157 kg. The KBO25-PP-AS is sealed on all sides, protecting the raceways from contamination while retaining lubricant inside the bearing. A relubrication facility allows grease to be replenished without dismantling the unit, supporting continued operation under linear load. The open design permits mounting along a full-length shaft, and a corrosion-resistant version of this construction is available where environmental conditions require it.