KRE72-PP-A is a needle roller bearing designed as a stud type track roller, built with a particularly thick-walled outer ring supported on a needle roller and cage assembly. The solid roller stud incorporates a fixing thread with a mounting aid, and an eccentric collar is included for adjustment. Outside diameter is 72.0 mm, width is 80.0 mm, and net mass is 1.024 kg. Axial guidance of the outer ring is achieved through plastic axial plain washers together with a contact flange and contact washer, giving the assembly a three-stage sealing arrangement acting on both sides. The PP sealing keeps contamination out of the raceway while the thick-walled outer ring provides load-bearing capacity suited to rolling contact along a track. The design allows the roller to run directly on the stud, simplifying mounting where a solid, self-contained track roller unit is required.