This unit combines a linear ball bearing with a bearing housing, allowing direct linear motion along a shaft without a separate housing bore. The KTHK12-B-PP-AS has a width of 40.0 mm, a height of 33.0 mm, and a net mass of 0.13 kg. The design permits a corrosion-resistant variant. The unit is sealed on both sides and pre-filled with grease, with a relubrication facility allowing grease to be replenished during service without disassembly. The integrated housing simplifies mounting and alignment along the shaft axis, while the sealing arrangement limits ingress of contaminants into the ball track during linear travel.