. Railway mechanical engineer . end of the spindle to the table is29 in. The length of feed is 12 in.; vertical adjustment oftable, 18 in. The table when furnished plain is 15 in. by16 in. When fitted up as a single purpose machine, speedsof 144, 226, 300 and 468 are provided. When fittedup as a quick change machine, 16 speed changes from 39 to632 r. p. m. are available. The feeds on the single purposemachine are .008 and .025 in. per revolution. The feeds onthe quick change machine are 10 in number, varying to .094 in. per revolution. The pulley speed is The standard
. Railway mechanical engineer . end of the spindle to the table is29 in. The length of feed is 12 in.; vertical adjustment oftable, 18 in. The table when furnished plain is 15 in. by16 in. When fitted up as a single purpose machine, speedsof 144, 226, 300 and 468 are provided. When fittedup as a quick change machine, 16 speed changes from 39 to632 r. p. m. are available. The feeds on the single purposemachine are .008 and .025 in. per revolution. The feeds onthe quick change machine are 10 in number, varying to .094 in. per revolution. The pulley speed is The standard speeds and feeds listed above arecomprehensive and cover the average requirements, but ifother combinations are desired they can be furnished. This machine may be arranged for driving with an indi- vidual motor when desired. For this arrangement the ma-chine is furnished with the base extended in the rear towhiclv the motor is bolted. This makes the machine and itsmotor self-contained, which is especially desirable if it is at. Baker No. 121 IVledi Duty Drilling and Boring Machi any time necessary to move the machine. Motor speedsshould preferably be 1,200 though it may run at anyspeed. A tapping reverse, supporting bracket for heavy bor-ing operations, positive depth feed, or multiple depth gfopcan be furnished as special equipment. January, 1922 RAILWAY MECHANICAL ENGINEER Rugged Portable Universal Motor Drill (ERHAPS the most important feature of the portableelectric drill, illustrated, which was recently placed onthe market by the Hisey-Wolf Machine Company, Cin-
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
