STO20-ZZ Track Roller
The series NATR yoke type track roller are of non-separable design, consisting of a crowned or cylindrical outer ring, caged needle rollers, an inner ring and two retaining end washers securely fastened to the inner ring. The series STO.ZZ yoke-type track rollers are of separable design with two loose end washers. These end washers placed in the counter bore of the outer ring, form very effective labyrinth type shields, providing good retention of lubricant and exclusion of foreign material.