. Railway mechanical engineer . y means of an wheel. The thrust from this screw is taken in bothdirections on a large double ball thrust bearing. Powerfeed to this screw is through ratchet R. The round nose roughing tool 5 is 1^ in. wide by 3 It is subject to the heaviest cutting load and is,therefore, carried on a hardened serrated steel plate, andclamped by two large hardened steel screws. The othertools are carried on two faces of the turret, thus requiringonly two indexings for the complete turning of the flange roughing tool T and tread chamfering tool Uare c
. Railway mechanical engineer . y means of an wheel. The thrust from this screw is taken in bothdirections on a large double ball thrust bearing. Powerfeed to this screw is through ratchet R. The round nose roughing tool 5 is 1^ in. wide by 3 It is subject to the heaviest cutting load and is,therefore, carried on a hardened serrated steel plate, andclamped by two large hardened steel screws. The othertools are carried on two faces of the turret, thus requiringonly two indexings for the complete turning of the flange roughing tool T and tread chamfering tool Uare carried on one face and the flange finishing tool V iscarried on the other face. Tools T and V are bolted to theturret, whereas tool U is carried on a slide, brought intoaction through a cam actuated by lever IF and clamped bylever A. Operation of Turret Tool Post All levers and hand wheels are within easy reach sothat the operator can stand between the rests and see thecutting tool in operation and from this position manipulate. 2—Turret Tool Post Just Being Turned to Bring the FinishingTools Into Play the turrets. With the turret in the position shown in Fig. 1,the tread and top of the flange is turned off by tool F, bymeans of power feed. With a slight additional movementin the same direction through hand wheel Q tool T isbrought into action. \\ithout any lateral movement theturret is indexed, bringing into action tool V. The indexing is done by withdrawing key C by lever Dand revolving the turret through 90 deg. by lever Y. Theturret is locked by bringing the key forward. It only re-quires four turns of the hand wheel G to withdraw thetop slide sufficiently for indexing the turret. The indexingtime is a fraction of a minute. The turret is again indexedback, bringing tool U into action. This completes the cycleof operation and leaves the turret in position to begin thenext wheel. A complete set of tools is regularly furnishedwith each turret. MaimiMiiMiDiiimimiiiiiiMiiBiiii
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
