. Railway mechanical engineer . Fig. 1—Hart Staggered Roller Bearing Fig. 2—View Showing Inner Race, Staggered Rolls and Outer Race frictional method of efficiently carrying large radial loads, raceways. This form of bearing construction is said to pro-These rolls are made of high carbon, high chrome steel, vide freedom from roll breakage, maximum load carryinghardened and ground, and operate between two raceways of capacity, excellent lubrication and long life. June, L921 RAILW W MECH WKWI. ENGIN£ ER 397 In roller bearings having a series of long, continuousrollers it is difficult to grind tr
. Railway mechanical engineer . Fig. 1—Hart Staggered Roller Bearing Fig. 2—View Showing Inner Race, Staggered Rolls and Outer Race frictional method of efficiently carrying large radial loads, raceways. This form of bearing construction is said to pro-These rolls are made of high carbon, high chrome steel, vide freedom from roll breakage, maximum load carryinghardened and ground, and operate between two raceways of capacity, excellent lubrication and long life. June, L921 RAILW W MECH WKWI. ENGIN£ ER 397 In roller bearings having a series of long, continuousrollers it is difficult to grind true cylinders without , there is danger of roller warpage during heat View of Assembled Thrust Bearing Other things being equal, the roller warpage varies prac-tically as the ratio of the length to the diameter of the rollersand it is obvious that in short rolls, with the diameter ap- proximately equal to the length, warpage is reduced to aminimum. Long rollers, due to warpage, possess an inherentmisalinement and, when a load is applied to the bearing,frequently tend to skew diagonally with the races. Thistendency is accelerated bj the running clearance providedfor successful operation and the result, frequently, is rollerbreakage. By employing a series of short rolls the skewingtendency is so small that the rolls adjust themselves to suchvariations. An additional advantage of staggered rolls is their moreequal distribution of the load. They present a multiplicityof raceway supports and adjust themselves absolutely tothat portion of the raceway which they carry. The result isa maximum utilization of roll length for load purposes, inci-dent to full line
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
