Crane rail wheel 100 × 50 mm with a 45 mm bore, very thin-walled special ball bearing, and abrasion-resistant polyurethane coating (92 Shore A) for maximum bore capacity with a compact design. The slim bearing design offers high radial load capacity with low rolling resistance; the 92A PU coating ensures quiet, floor-friendly running, good traction, and damping on crane rails and guide profiles. Ideal for stage and material handling applications, trolleys, gantries, and linear guides with extremely tight installation spaces and large shaft diameters. Designed for continuous operation; the 50 mm raceway increases tracking accuracy and reduces surface pressure. Optional: spacer sleeve, keyway seat, or custom bearing/bushing package.