. American engineer and railroad journal . K to bring the construction up to modern requirements, the or-dinary standards have been greatly surpassed in this design. Exceptional fly-wheel capacity has been provided to store upa large surplus of energy between strokes for driving at in-stants of punching or shearing. It will be noticed that the In view of the marked tendency in modern shop practicetoward all-gear drives for machine tools, the lathe shown inthe accompanying illustration will be of special interest to allwho are concerned with the use of machine tools. It showsthe American lathe,
. American engineer and railroad journal . K to bring the construction up to modern requirements, the or-dinary standards have been greatly surpassed in this design. Exceptional fly-wheel capacity has been provided to store upa large surplus of energy between strokes for driving at in-stants of punching or shearing. It will be noticed that the In view of the marked tendency in modern shop practicetoward all-gear drives for machine tools, the lathe shown inthe accompanying illustration will be of special interest to allwho are concerned with the use of machine tools. It showsthe American lathe, built by The American Tool Works Co.,Cincinnati, O., with a new friction all-geared head, designedfor direct connection to an electric motor. The headstock is. In this case, built as a complete unit towhich any type of motor, constant or variable-speed, may bereadily connected, the motor being set on top, or at the rearof the gear casing. The mechanical speed changing device issimple and powerful, requiring only six gears for the various. NEW DESIGN OF LATHE WITH GEARED VABIABLE-SPEED HEADSTOCK DRIVE.—AMERICAN TOOL WORKS COilPANY. 472 AMERICAN ENGINEER AND RAILROAD JOURNAL. changes of spindle speeds. It has a very few parts and lessgears than any other similar device. All the gearing andmechanism are neatly and completely housed in, and the gearsare arranged to run at very low pitch line velocities, reducingto a minimum the noise incidental to all-gear drives. Frictionclutches are used throughout, thus avoiding the necessity ofslip gears, pull pins, hollow shafts, tumbler gears or compli-cated and frail parts. This construction, in connection with a fifteen-speed motor,was made to provide sixty spindle speeds on the 20-inch lathe,ranging from 5 to 322 rev. per min., in geometrical progression,all of which are instantly and easily obtainable while the toolis in operation; the motor controller lever is located onthe right hand side of the apron convenient to the hand of theope
Size: 2167px × 1153px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
