. American engineer and railroad journal . adop-tion I 1 Hi ibl ! governing thi use of freight ears in interlim traffic 10 the exti uch rule Free interchange of cars, with such regulatiithe principle of pn . p demands, thai extent will the future efficiency of freight cars I increased.—Arthur Hale,1 Car Efficiency, The American Railway Ass,:, :,jluoi. TURNING DRIVING WHEEL TIRES. It is nti. 11 neci ssary to change ami return the tires of an en-gine two or three time- between shoppings. When the ire- aresent to the shop for returning, tin: usual practici 1 iirink them on an old pair of whee
. American engineer and railroad journal . adop-tion I 1 Hi ibl ! governing thi use of freight ears in interlim traffic 10 the exti uch rule Free interchange of cars, with such regulatiithe principle of pn . p demands, thai extent will the future efficiency of freight cars I increased.—Arthur Hale,1 Car Efficiency, The American Railway Ass,:, :,jluoi. TURNING DRIVING WHEEL TIRES. It is nti. 11 neci ssary to change ami return the tires of an en-gine two or three time- between shoppings. When the ire- aresent to the shop for returning, tin: usual practici 1 iirink them on an old pair of wheel centers, mounted on an axle, andturn them in the driving wheel lathe, [he cost of the labor andgasoline for shrinking the tire- on and removing them issiderable. One shop has found that it could handle the tnabout one-half of the cost of turning them in this way by turn-ing them, one at a time, on a boring mill. The mill was an oldone and not equipped with a universal chuck. At the St. Paul shops of the Great Northern Railwaj a -till. MANDRELS FOR TURNING TIRES. different method is followed. Old driving wheel centers for 48,56 and 66 in. wdieels are mounted on scrap axles and turned sothat the tires will slip over them neatly. Taper key-ways areslotted in the circumference about 18 in. apart. When the tire-is slipped on the center, taper keys (1/16 in. to 1 are drivenin, thus holding the tires securely in the centers. The slot andthe keys are tapered so that the face of the key and the insideof the tire are parallel when the key is driven tight. They arethen turned in the wheel lathe. Only a few minutes are re-quired to set the tires on the centers and the arrangement is saidto be very satisfactory. Three sets of these mandrels are allthat are required to take care of the greater proportion of thedriving wheels in use on the Great Northern; the mandrels wdiennot in use are stored alongside the lathe. A partial view of thesemandrels is shown in the accompanying illustra
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
