. American engineer and railroad journal . AIR DRILL PRESS FOR TOOL ROOMWORK This compact air drill press wns built and installed in the toolroom of the Winona shops, Chicago and Northwestern Ry., andis said to be the most useful and busiest machine in that depart-ment. Its construction is clearly indicate! in the drawing. , and it can be built of any size mosi convenient, but in thisinstance the cast iron round base (A) is 14 in. in diameter and11/2 in. thick. Although the drawing lacks dimensions, theycan be closely approximated with this ts a basis. The plate (A) which serves m the dou
. American engineer and railroad journal . AIR DRILL PRESS FOR TOOL ROOMWORK This compact air drill press wns built and installed in the toolroom of the Winona shops, Chicago and Northwestern Ry., andis said to be the most useful and busiest machine in that depart-ment. Its construction is clearly indicate! in the drawing. , and it can be built of any size mosi convenient, but in thisinstance the cast iron round base (A) is 14 in. in diameter and11/2 in. thick. Although the drawing lacks dimensions, theycan be closely approximated with this ts a basis. The plate (A) which serves m the double capacity of drillpress base and table, has two brackets (B) which support theiJl in. vertical columns (C). The operating handle (D) ispivoted at (E) to (I) and with it the operator feeds the drill.(I) is split part way and bored out to fit the column (C). Aset screw (G) is screwed through the split portion and isloosened or tightened by the small lever (F) on its head. Thispermits the drill to be aised or lowered to suit the work and. Fig. No. 1 tightened to the column. (H) is a sleeve over which a cordtravels to a weight to counterbalance the air motor. If a Little Giant tell-tale motor cannot be obtained a suitableair motor is suggested in Fig. 2 in which (G) is a cast ironbody, 3 in. inside diameter, with a partition (H) and heads (I).Within are two rotating pistons (A) niounted on a shaft (B)in the heads (I), out of center. (D) are packing strips, and(C) the springs which hold them out against the cylinder wall.•{E) are also packing strips inserted in the cylinder body exten- We Find It Desirable in the Purchase of Material to keepin mind the manufacturers located on our own lines, and otherthings, such as price, quality and delivery being equal, to givethem the preference. The difficulty of this problem is to deter-mine when other things are equal. A similar difficulty ariseswhen in the purchase of new cars or locomotives we are called Drill ChuckDrill III . • 1
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
