| The following types or options of bearing and lubrication device may be specified (refer also to availability table below right). The twin bearing type which is the default choice, comprises two individual bearings on a common stud. This offers some compliance, with smoother running, easy adjustment and greater tolerance of misalignment. The Double Row bearing type (DR) incorporates a one-piece bearing with two ball tracks. This offers higher load capacity, especially in the radial directio" ;uk; ■ ;:: r. ..!vr..:y of ;!obr>-,. The Nitrile Sealed bearing option (NS) provides a higher degree of sealing against ingress of water or debris than does the default metal shielded type. A small increase in friction may result. The Lubricator option (LB) applies oil to the V contact surfaces by means of lightly sprung felt pads which are charged with oil to give long intervals between re-lubrication. The lubricator option is useful where the ridvartnqo?. of increased load and life are required |