This linear ball bearing enables low-friction linear motion along a shaft, using recirculating ball tracks in a machined open design. Bore diameter is 25.0 mm, outside diameter 40.0 mm, and net mass 0.157 kg. It is sealed on all sides, which keeps the raceways protected from contamination during operation. The closed, sealed construction allows the bearing to run with retained lubricant and reduces the need for frequent relubrication. Its corrosion-resistant design option makes it suitable for use in humid or chemically exposed environments where standard steel bearings would degrade faster. The open design permits mounting directly onto a shaft without additional support housings, provided proper alignment and load conditions are maintained.