. American engineer and railroad journal . n minutes is long enough to keep pressure onthe belt, hut if hand clamps are used they must be left on forthree or four hours. In either case the belt should not be putunder tension for at least five hours after gluing. Paper placedbetween the boards and the belt will prevent the belt from becomingglued to the boards. Greasy belts should be cleaned in gasoline before attempting tocement them. Any grease in the belts or glue is liable to causethe splice to fail. No rivets, wire pegs, or any other fasteningsaside from cement should be used in splicing b
. American engineer and railroad journal . n minutes is long enough to keep pressure onthe belt, hut if hand clamps are used they must be left on forthree or four hours. In either case the belt should not be putunder tension for at least five hours after gluing. Paper placedbetween the boards and the belt will prevent the belt from becomingglued to the boards. Greasy belts should be cleaned in gasoline before attempting tocement them. Any grease in the belts or glue is liable to causethe splice to fail. No rivets, wire pegs, or any other fasteningsaside from cement should be used in splicing belts. Ordinary furni-ture or patternmakers glue is satisfactory for belting. Width of Belting.—A pulley should be 25 per cent, wider thanthe belt running on it. This rule should be followed as closely aspossible, and especially with cone pulleys. Tension and Thickness of Belts.—Belts should have a tensionwhen at rest of about 100 lbs. per sq. in. of width of good doublebelting. If not practical to measure the tension on the belt, make. FIG. 6.—CORNER OF BELT ROOM SHOWING STOCK OF TAKE UP PIECES AND BELTING. the fit length 1 in. per 1U ft. less than the tape-measured lengthover the pulleys. A steel tape should be used. Great care shouldbe taken to prevent the running of too tight belts and consequentburning of bearings. Double belts should not be run on pulleys less than G in. indiameter, and triple belts on pulleys less than 20 in. in should sag onto the pulleys and not away from them. Veryshort drives (belts under 20 ft. long) should be avoided. When-ever possible, run up-and-down belts on a slant, so that the beltwill sage onto the pulley. Decembee, L906. AMERICAN ENGINEER AND RAILROAD JOURNAL. 45*3 For each horsepower lo be transmitted allow SO sq. fi. o£ doublebelt to pass over the pulleys per minute; allow 160 sip ft. or singlebelt, or 1,000 lineal ft. of double 1 in. belt, or 2,000 lineal ft. ofsingle belt. Kind of Lace to Use.—For general service,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
