For concentric grip on the shaft and less vibration at higher speeds, specify Dodge D-LOK normal or medium duty mounted ball bearings. These unique, concentric collar bearings are engineered with attributes that assure you superior holding power with improved concentricity. Even at high speeds, the D-LOK bearing grips the shaft tighter and more uniformly for less vibration. Dodge D-LOK Take-Up D-Lock Ball Bearing, Normal Duty Narrow Slot, Series: 209, 1-3/4 in Bore Dia, 5.44 in Length, 2.01 in Width, 4-3/4 in Height, 7891 lb Dynamic/4906 lb Static, For Use With: NS400 Take-Up Frame, Cast Iron Bearing, 225 to 400 deg F, Powder Coat Precision-hardened and honed inner and outer ringsNew rugged housing designD-LOK locking mechanismDodge DualGuard positive contact seal including rubberized flingersNon-expansion typeWide inner ring and clamp collar