Support rollers are based on needle or cylindrical roller bearings . To meet the requirements of different applications, they are available in several designs and variants: with or without a cage with or without flange rings with or without an inner ring with or without seals (sealed or open) with the outer ring running surface profile: crowned as standard cylindrical (flat) Accommodate high radial loads The thick-walled outer ring enables high radial loads, while reducing distortion and bending stresses. Long service life The crowned outer ring running surface is beneficial for applications where outer ring tilting relative to the track may occur or where edge stresses need to be minimized. Specifications Inner Diameter: 30mm Outer Diameter: 72mm Width: 34mm