. American engineer and railroad journal . FIG. 6.—PORTABLE RE-TURNING MACHINEFOR INSIDE CRANKS. FIG. 7.—PORTABLE MACHINE AT MOTOR DRIVE. 8.—PORTABLE MACHINE WITH HALFOF CASE REMOVED. June, 1908. AMERICAN ENGINEER AND ) JOURNAL. 221 centering device on the lower half of the case. The whole ma-chine is shifted until this mark is exactly opposite the prickpunch mark previously located on the corner of the disc, and isclamped there by means of pointed set screws located at con-venient distances on the periphery of the case. This step takescare of the quartering of the axle. The
. American engineer and railroad journal . FIG. 6.—PORTABLE RE-TURNING MACHINEFOR INSIDE CRANKS. FIG. 7.—PORTABLE MACHINE AT MOTOR DRIVE. 8.—PORTABLE MACHINE WITH HALFOF CASE REMOVED. June, 1908. AMERICAN ENGINEER AND ) JOURNAL. 221 centering device on the lower half of the case. The whole ma-chine is shifted until this mark is exactly opposite the prickpunch mark previously located on the corner of the disc, and isclamped there by means of pointed set screws located at con-venient distances on the periphery of the case. This step takescare of the quartering of the axle. The sides of the gear aremachined parallel to the plane of rotation, and hence offer ameans of lining up the machine so that the pin will be turnedndicular to the cheeks. A crank axle which has seenenough hard service to necessitate the re-turning of its highpressure crank pins is usually sprung more or less, hence themachine should always be lined up parallel to the check next tothe drh my ; bearing, since this cheek is less likely
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
