This linear ball bearing provides guided linear motion along a shaft, built in a lightweight open-design cage with a bore diameter of 30.0 mm and an outside diameter of 47.0 mm. Net mass is 0.161 kg, and the unit is sealed on all sides, keeping dust and dirt away from the rolling elements while the ball recirculation path stays enclosed. The adjustable angle feature allows the bearing to accommodate slight shaft misalignment without binding, and the relubrication facility lets grease be replenished without dismantling the unit. This combination of full sealing, low mass and serviceable lubrication suits linear guide applications where sustained smooth travel and protection against contamination are required.