. Electrical world. ve Self-Feed Upright Drill. A positive self-feed drill embodying many notable improvements,has been brought out by W. F. & John Barnes Co., Rockford, illustration herewith shows plainly the construction. On thelarger tools there are eight changes of feed, and on^ the smaller sizesfour changes of feed. All these different feeds vary from one adaptedfor reamer work, or one for drilling in steel, to one of suitable coarse-ness for boring in cast iron. .•\ feed index plate is provided on each machine so that the operatormay tell at a glance the feed being used. It is cl
. Electrical world. ve Self-Feed Upright Drill. A positive self-feed drill embodying many notable improvements,has been brought out by W. F. & John Barnes Co., Rockford, illustration herewith shows plainly the construction. On thelarger tools there are eight changes of feed, and on^ the smaller sizesfour changes of feed. All these different feeds vary from one adaptedfor reamer work, or one for drilling in steel, to one of suitable coarse-ness for boring in cast iron. .•\ feed index plate is provided on each machine so that the operatormay tell at a glance the feed being used. It is claimed that this posi-tive feed will increase from 15 to 25 per cent, the output of a drill press; firstly, because the action is absolutely positive and does awaywith any slipping belts; secondly, the feed can be changed by a simplemovement of the lever while the drill is running. There is another point that the drill covers, in that it offers avariety of feeds adapted to the high-speed cutting steels that are. UPRIGHT LATHE. on the market to-day. With the positive feed the operator is inposition to use either slow-speed steel or high-speed steel. Thequestion of high-speed steel is something to be considered, and ma-chines must be adapted for their use. Small Gas Engines. The gas engine illustrated below is made up from castings fur-nished by the Carlisle & Finch Co., Cincinnati. Ohio. This enginewill develop ^ hp at a speed of 375 The castings are fur-nished in the rough; the cylinder, however, is bored out and facedoff, but no other work is done on any of the castings. A complete
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
