. American engineer . antage when the trackmen are at workat a part of the road remote from a station. C.\RS.—The Pullman Company, according torecent annual report, owns and controls 6,229 cars. Its 648 AMERICAN ENGINEER. Vol. 86, No. 12. FLOOR TYPE BORING MACHINE On page 376 of the July issue of this journal there appearedan illustrated description of a new horizontal boring njachinedesigned by the Rochester Boring Machine Company, Roches-ter, N. Y. This machine is an excellent example of the latestdevelopment of this type of machine tool which has shownprobably greater improvement i
. American engineer . antage when the trackmen are at workat a part of the road remote from a station. C.\RS.—The Pullman Company, according torecent annual report, owns and controls 6,229 cars. Its 648 AMERICAN ENGINEER. Vol. 86, No. 12. FLOOR TYPE BORING MACHINE On page 376 of the July issue of this journal there appearedan illustrated description of a new horizontal boring njachinedesigned by the Rochester Boring Machine Company, Roches-ter, N. Y. This machine is an excellent example of the latestdevelopment of this type of machine tool which has shownprobably greater improvement in the last few years than anyother tool for general use. The machine illustrated was of thetable type and incorporated many new and novel features. Thecontrol was practically all centralized at the saddle and theautomatic safety arrangements to prevent damage to themechanism were most complete. Practically the same machine is now being built in the floortype, as is shown in the accompanying illustration. It is suit-. Rochester Floor Type Horizontal Boring, Drilling andMilling Machine. able for boring, drilling, horizontal or vertical milling, tapping,splining, oil grooving or rotary planing, and is provided withpower speed, feed and traverse in every direction, all of whichare reversible. No two feeds or speeds can be engaged at thesame time, nor can the power rapid traverse in diiTerent direc-tions be thrown in until the feeds are disengaged. No twotraverses can be engaged at the same time and limit stops areprovided for every traverse in both directions. This machine has the same type of concentric screw feed thatis used on the table type. This was illustrated by sectionalviews and was fully described on page 377 of the July issue. Itemploys a long bronze nut engaging a square screw thread onthe spindle. The nut comes in contact with the side of thethread only and the end thrust in either direction is taken onball bearings of large diameter. In this way a very long bearingi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
