An experimental investigation to determine the relative merits of bronze and nodular iron as cage materials for cylindrical-roller bearings was conducted using four identical 75-millimeter-bore outer-race-riding cage-type cylindrical-roller bearings (tow with bronze cages and two with nodular iron cages). The test bearings were operated over a range of DN values (product of bearing bore in mm and shaft speed in rpm) from 300,00 to 2,100,000, oil flows from 2 to 8 pounds per minute, and loads from 7 to 1613 pounds.
