. Maître mécanicien de chemin de fer [microforme] . Le maître MÉCANICIEN DE CHEMIN DE FER Bickford Akcii I.ar Drill i66 mai 1904. Réglage de crémaillère et de pignon sur le rail, sont montés avec des gabarits individuels pour la mise en place des extrémités des forets.les deux forets centraux ont un réglage vertical de22 pouces, les adapter facilement au décalage du travail à portée de main et minimiser la portée des axes extérieurs. Les broches extérieures ou courtes ont un réglage vertical de 4^2 pouces. La table alimente upwardand a des flux de .008, .011 et .014 in. Par exercices révolutionnaires. Il est fourni avec l'avance rapide et de retour, ensemble avec

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. Railway master mechanic [microform] . The Bickford Akcii I.ar Drill i66 RAILWAY MASTER MECHANIC May, 1904. rack and pinion adjustment on the rail, are fitted withindividual jigs for steadying the ends of the drills.The two center drills have a vertical adjustment of22 inches, readily adapting them to the offset of thework at hand and minimizing the reach of the outerspindles. The outer, or short, spindles have a verticaladjustment of 4^2 inches. The table feeds upwardand has feeds of .008, .011 and .014 ins. per revolutionof drills. It is provided with quick advance and re-turn, together with automatic trip and carries two endsupports or jigs, which are adjustable horizontally and. Fig. 2—Adjustable Roughing Reamer. which clamp the work in position holding it securely, also a center support or jig which is adjustable verti-cally, so as to be readily adapted to the form of workwhether straight or having an offset in the center.The work is placed in the machine with the drop, oroffset, down, as shown in the illustration, instead of withthe offset portion towards the spindles as is sometimesdone. The machine is capable of absorbing sufficientpower to drill simultaneously six 2^-inch holes with-out causing undue wear in any of its parts. One ofthe chief features of this tool is its durability undercontinuous and severe duty. Its form of construction, practical and convenient arrangement for securing thework in position, together with the adjustable arrange-ment of the spindles, etc., is clearly shown in the illus-tration, and further features of interest are presentedby the following general -dimensions: Diameter of short spindles, least section. .1 15-16 in. Diam

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• bookcentury1800
• bookdecade1890
• bookidrailwaymaste
• bookyear1895