Provides linear motion along a shaft through recirculating ball tracks housed in an open, lightweight design. Bore diameter is 50.0 mm, outside diameter 75.0 mm, and net mass 0.554 kg. The open construction reduces weight while sealing on all sides protects the ball tracks from contamination. The relubrication facility allows grease to be replenished without dismantling the unit, supporting continued operation once the initial fill is depleted. The adjustable angle feature accommodates a degree of misalignment between the bearing and shaft axis, easing installation where perfect parallelism cannot be guaranteed. Sealing on all sides makes the KNO50-B-PP suitable for applications where dust or debris ingress must be limited, and the PP designation confirms plastic end seals fitted as standard.