. Railway mechanical engineer . Brinell and Scleroscope Hardness Testing Machine OCTOBER. 1921 RAILWAY MKVHANICAL ENGINEER 657 Boring, Drilling and Milling Machine ANEW line of horizontal boring, drilling and millingmachines bas been developed by the Pawling &Harnischfeger Company, Milwaukee, Wis., of whichthe style 4-F machine, shown in Figs. 1 and 2, is thesmallest size. This machine is espa ially designed for heavymilling and large 1 mring operations and can be used either asa single-purpose machine or for general machine shop machine is modern in design, built to drive high-speed
. Railway mechanical engineer . Brinell and Scleroscope Hardness Testing Machine OCTOBER. 1921 RAILWAY MKVHANICAL ENGINEER 657 Boring, Drilling and Milling Machine ANEW line of horizontal boring, drilling and millingmachines bas been developed by the Pawling &Harnischfeger Company, Milwaukee, Wis., of whichthe style 4-F machine, shown in Figs. 1 and 2, is thesmallest size. This machine is espa ially designed for heavymilling and large 1 mring operations and can be used either asa single-purpose machine or for general machine shop machine is modern in design, built to drive high-speed tool steels to capacity limits. There are numerousnoteworthy features. Narrow guiding surfaces are usedthroughout; all feed screws are in tension and all slidingparts are arranged for taking up wear, the saddle is fullycounterbalanced with the counterweight located inside thecolumn. Centralized control is provided. All milling feed-. Fig. 1—Front View of Machine Showing Large Face Plate, StandardSpindle, Bed Plate and Outer Support are actuated through quick pitch worm and bronze wormwheels, revolving on quick pitch screws in tension. Ex-ternally and internally driven face plates are interchange-able; back gears are close to the spindle, making all driveshafts hich speed. Automatic stops are used for saddle andcolumn for machines electrically driven. The spindle-carrying saddle is of box section, well ribbed,and can be handled at any one point, when fully assembled,without fear of distortion. It contains the drive for thespindle, the feeding mechanism and the feed distributingmechanism. All drive gearing and shaft bearings are bronzebushed and the main spindle sleeve bushing is phosphorbronze, scraped to a slight taper for readily taking up wearof the spindle driving sleeve. The saddle is guided upon thecolumn by a narrow guide placed at the front nearest thecutting pressure. The adjustment for wear is made by t
Size: 1885px × 1325px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
