. Electric railway journal . cheapestgrade of brush which would give satisfactory results. Thebrushes now used are a medium hard grade of the Laclede brand down as required and there has been no unusual or irregularflange wear. Steel-tired wheels are used under the old carsbut several hundred solid steel wheels have been applied underthe new cars. A Niles center-drive wheel lathe is used toturn all electric car wheels and some steam passenger carwheels. It is located in a pit on the ground floor of themill building adjoining the truck overhauling tracks in the elec-trical shop. The floor of th
. Electric railway journal . cheapestgrade of brush which would give satisfactory results. Thebrushes now used are a medium hard grade of the Laclede brand down as required and there has been no unusual or irregularflange wear. Steel-tired wheels are used under the old carsbut several hundred solid steel wheels have been applied underthe new cars. A Niles center-drive wheel lathe is used toturn all electric car wheels and some steam passenger carwheels. It is located in a pit on the ground floor of themill building adjoining the truck overhauling tracks in the elec-trical shop. The floor of the shop is of smooth asphalt inwhich have been embedded flat steel plates about 12 in. wideto form runways on which a pair of wheels and axle can berolled from the electrical shop into the adjoining room andon to the bed of the wheel lathe. A jib crane with an air hoistis used to serve the wheel lathe. All wheels are pressed onand off in the machine shop. TESTING CARS After a car has been overhauled and all parts reassembled. Long Island Railroad—Wheel Lathe and Steel Plates in Shop Floor made by the National Carbon Company. The life of thebrushes is from 45,000 to 50,000 miles. All brushes are of thesame width and hardness and are held on the commutator witha pressure of about 6 lb. per square inch. No difficulty fromworn commutators, excessive sparking or carbon dust is nowbeing experienced. BEARINGS Motor armature and axle bearings of all sizes are turned ina chuck on the Pond lathe. Various sizes of bushings are usedto hold the bearings in the chuck and these bushings serveas templates for worn or twisted shells. Only a few of theoriginal armature shafts have required turning and the re-duction in diameter has been by even sixteenths of an bearings for armature shafts of reduced size are bored outto the proper size as required and no stock of odd sizes is kepton hand. WHEELS No special records are kept of wheels. They are turned the wiring and equipment is given a
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