. Railway mechanical engineer . his it will beseen that the turret is revolved by a crank movement, a rolleron the end of the crank working in the spaces between theblocks which are doweled and screwed to the bottom of theturret as shown. In order to give an idea of the placing of the changegears a part of the back of the machine is shown in Fig. 5,with the gear covers removed. The gears are easily slippedoff or on bv hand. CUTTING DOWN THE CHUCKING TIME 1\ keeping with the stead)- progress in the use of the in-dividual electric motor drive for machine tools in rail-road shops, the acquisition
. Railway mechanical engineer . his it will beseen that the turret is revolved by a crank movement, a rolleron the end of the crank working in the spaces between theblocks which are doweled and screwed to the bottom of theturret as shown. In order to give an idea of the placing of the changegears a part of the back of the machine is shown in Fig. 5,with the gear covers removed. The gears are easily slippedoff or on bv hand. CUTTING DOWN THE CHUCKING TIME 1\ keeping with the stead)- progress in the use of the in-dividual electric motor drive for machine tools in rail-road shops, the acquisition of electrically operated acces-sories and small tools is receiving much consideration. Thelarge magnetic chuck shown in the photograph is offered as a suggestion in the chucking of parts for face face of the chuck is 18 in. by 84 in. and is shown inoperation bolted to the bed of a heavy duty face grindingmachine manufactured by the Diamond Machine Company,Providence. R. I. The four connecting rods are being ground. (jfintling Machine Equipped \sith Magnetic Chucli June, 1919 RAILWAY MECHANICAL EXGINEER 371 from the rough without any previous machining. The of tlie work the links will not Ije held by a smooth surface, question immediately arises as to how the work is held The answer is that a very light cut is taken from the sur- magnetically in view of the unevenness consequent to the faces in the rough and then the links are turned over so that rough forging, and in view of the fact that at the start the fairly smooth surface is against the magnetic face. REMARKABLE DEVELOPMENT OF CAST TOOL STEEL THE perfection of a method of casting tools devoid of blow holes, crystallization,or strains, providing a homogeneous casting through-out with remarkable metal removing ability, seems to havebeen successfully achieved. A varied collection of steel toolsand tool steel, manufactured under the Davidson process ofcasting formed tools, will be
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
