This plain bearing provides linear guidance along a shaft through direct sliding contact rather than rolling elements. It is built in an open design and sealed on all sides, which keeps contaminants out of the sliding surface while retaining lubricant inside the housing. A relubrication facility allows grease to be replenished during service without dismantling the unit. Net mass of the bearing is 0.36 kg. The all-round sealing combined with the relubrication port makes this bearing suitable for linear motion applications where the shaft runs in an open environment and periodic grease replenishment is required to maintain smooth sliding performance. Because it is a plain bearing rather than a rolling type, it tolerates continuous sliding loads without dependency on ball or roller elements, and its sealed construction protects the sliding interface from ingress during extended operation.