. Canadian machinery and metalworking (January-June 1919). -lubricators. Instead of necessitating fre-quent inspection of the bearings, re-newal of the lubricant and possibly oc-casional rebabbitting, ball-bearing mo-tors require no attention other thanperiodic lubrication—the length of timebetween inspections being from one weekto six months, depending upon the ser-vice. Ball-bearing motors are clean. Theball bearings are encased within bearingheads with sealing grooves on each sideof the bearing, preventing the leakageof lubricant. With this protection, drip-ping or leaking of oil is elimina
. Canadian machinery and metalworking (January-June 1919). -lubricators. Instead of necessitating fre-quent inspection of the bearings, re-newal of the lubricant and possibly oc-casional rebabbitting, ball-bearing mo-tors require no attention other thanperiodic lubrication—the length of timebetween inspections being from one weekto six months, depending upon the ser-vice. Ball-bearing motors are clean. Theball bearings are encased within bearingheads with sealing grooves on each sideof the bearing, preventing the leakageof lubricant. With this protection, drip-ping or leaking of oil is eliminated andthere is no danger of goods becomingsoiled or contaminated with oil from thissource. Gear-Drive Motors Where gear drive is used, ball bearingson electric motors are of particuar ad-vantage. In order that gears shall runsmoothly and quietly, the proper distancebetween pinion and gear centers must bemaintained. It is a fact that noisy,chattering gears may be caused by wearhaving taken place in the bearings sup-porting the gears. After long service. DISASSEMBLED VIEW OF MOTOR. SHOWING BALL BEARINGS. SKF RADIAL BALL BEARING SHOWN IN NORMALPOSITION AND IN DEFLECTED POSITION. January 9, 1919. CANADIAN M A C Tl I X I•: R Y 87 with this type of drive, ball bearingshow no appreciable wear and conse-quently the gears mesh properly, givinglonger and better service. Plain bearings must be designed sothat the pressures are well under thelimit for the corresponding speed of thebearing. To reduce unit pressure in the • Ball Bearings on Axle GeneratorsBall bearings are now used almost ex-clusively on axle-driven generators forrailways. A few years ago these ma-chines were equipped with plain bear-ings. The service is so severe, however,and the attention which can be given isso small, that ball bearings have proved
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmachinery, bookyear19
