Product Description
The interior temperature of an annealing furnace is in the range of 1200F. Even though bearings supporting the pinch rolls are outside the walls, they still reach temperatures up to 7500F and yet must be able to compensate for shaft expansion from cold startup to production temperature levels. Rigid, grease lubricated rolling element bearings could not meet these conditions, so the operators specified GRAPHALLOY journal sleeve bushings sized for installation in a special metal shell and inserted into the existing housing. Since 1990 the design has been operating successfully in this tortuous environment.