Conveyor Bearing, Type 220, 2-1/2 in Wd, Hard Iron, 500 deg F, Uncoated, 1-1/2 in Dia Bore

Martin's hanger bearings are made of a variety of materials, as denoted by their suffix: bronze (BR), oil-impregnated bronze (MBR), cast hard iron (H), oil-impregnated hard iron (MHI), wood (W), nylatron (N), melamine (MCB) and UHMW (U).