自制微型钻台.pdfVIP

科技论坛 By Alexander Maxwell Table is elevated with hand control to feed work against drill held in stationary chuck Y HAVING the table travel up and down instead of the chuck? the con- struction of the little drill press shown in Fig. 1,is simplified to the point where all the parts can be machined completely on any small screw-cutting lathe. Standard stock materials are used-namely, the pipe fittings, bearings and chuck, while the rest of the parts are turned to size from odd umn. Ikdless rubber belts of the type used on vacuum cleaners provide a slip-free Fig. 6, and in Fig. 10. The flange is chucked pieces of steel, brass and flat iron. Any to the faceplate and the threads are bored small utility or sewing-machine motor will out to make a wringing fit over the col- do to drive the press, although it is advis- umn. When turning cast iron, remember able to use a motor of the induction type to take a deep initial cut to prevent the having end thrust bearings, if it is to be hard surface crust from taking the edge mounted in a vertical position beneath the off your cutting tool. bench as shown. From Fig. 3 you can get Machining the pipe reducing tees to fit a general idea of how the parts fit together, the column requires care. You will notice and how the chuck and motor are belted that one end of the upper tee is turned to a central jackshaft enclosed in the col- down to fit squarely in the shoulder cut 科技论坛 ofthe bearing block. h ho- the W, eentet them on the thre8d.s pather th