KR30-PP-A is a needle roller bearing designed as a stud type track roller, built with a particularly thick-walled outer ring running on a needle roller and cage assembly. The solid roller stud carries a fixing thread and a mounting aid for straightforward installation. Outside diameter is 30.0 mm and net mass is 85.6 g. Axial guidance of the outer ring is provided by plastic axial plain washers together with a contact flange and contact washer, giving the assembly a defined, low-friction axial position. Sealing is of PP type, arranged as a three-stage seal with plastic axial plain washers on both sides, keeping contaminants away from the needle rollers and retaining grease inside the bearing. The design has no eccentric collar, so the stud position is fixed rather than adjustable. The thick-walled outer ring and solid stud allow the roller to carry radial load directly through the fixing thread, while the sealed construction supports maintenance-friendly operation with grease lubrication.