. Railway mechanical engineer . 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-. Hisey-Wolf
. Railway mechanical engineer . 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-. Hisey-Wolf Portable Improved Desigr cimiati, Ohio, is its rugged design throughout. This newdrill IS known as the Super-universal motor drill, being builtin ;!§ in. and J^ in. sizes. Approved construction featuresare included, and the motor, also made by the Hisey-WolfMachine Company, is of modern design, provided with ballbearings throughout. Referring to the illustration, all revolving spindles, /, 2and J, are fitted with ball bearings securely fastened, there-by eliminating slipping. To eliminate all strains commonvnth permanently fixed bearings spring tension is provided,a feature which automatically permits expansion and con-traction of the shafts without distortion. In addition, freeand uniform traction of the balls tends to add greatly to thelife of all parts. The quick cable comiector ^ is an important external connector pemiits cable repairs and renewalsto be made without dismantling the machine, thereby pre-venting much inconvenience and loss of time. The paten
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
