. American engineer and railroad journal . backgeared to the emery wheel spindlewith a ratio of about 3 to 1. Thegears are encased and the grinderspindle bearings are self-oiling. motor is used, and the emerywheel, 36 ins. in diameter with a4-in. face, is operated at a speedof 425 The floor space oc-cupied by the machine is 30 by 47ins., and its weight complete is2,650 lbs. The motor is controlledby a starting box, but ordinarilythis is not used except at the be-ginning and end of the workingday. These machines are made bythe Bridgeport Safety EmeryWheel Company, Inc., Bridgepor
. American engineer and railroad journal . backgeared to the emery wheel spindlewith a ratio of about 3 to 1. Thegears are encased and the grinderspindle bearings are self-oiling. motor is used, and the emerywheel, 36 ins. in diameter with a4-in. face, is operated at a speedof 425 The floor space oc-cupied by the machine is 30 by 47ins., and its weight complete is2,650 lbs. The motor is controlledby a starting box, but ordinarilythis is not used except at the be-ginning and end of the workingday. These machines are made bythe Bridgeport Safety EmeryWheel Company, Inc., Bridgeport,Conn. CLOSE QUARTER AIR DRILL The accompanying illustration shows a new piston air drillrecently perfected by the Independent Pneumatic Tool Com-pany for work in corners or other close quarters. It is desig-nated as Thor No. 8 and has a capacity for drilling upto a 2% in. hole in any material. A ratchet with a perman-ent handle is fitted on the feed screw, making it possible todrill or ream in very inaccessible places. The principal di-.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
