. Locomotive engineering : a practical journal of railway motive power and rolling stock . ng speed Depth of cut Feed Pounds of metal removed per hour Gain in % Gain in % Oct. 25,98. May :i, 99 Jan. 15,00. Cut of 3dOver id. Cut of 3dOver ist. 8 II 21 9 25 3 16V 183% .J3 .278 .30 8„ 30% .07 .0657 .087 32% 24% 137-3 68% 340% from two to four times that of any othersteels they have tried, and these figureswere borne out in the experiments shown,which were as follows. Cuts were 3-16inch deep, 1-16 inch feed in all cases. First Test—Very hard tool steel, , was turned at 15 fee
. Locomotive engineering : a practical journal of railway motive power and rolling stock . ng speed Depth of cut Feed Pounds of metal removed per hour Gain in % Gain in % Oct. 25,98. May :i, 99 Jan. 15,00. Cut of 3dOver id. Cut of 3dOver ist. 8 II 21 9 25 3 16V 183% .J3 .278 .30 8„ 30% .07 .0657 .087 32% 24% 137-3 68% 340% from two to four times that of any othersteels they have tried, and these figureswere borne out in the experiments shown,which were as follows. Cuts were 3-16inch deep, 1-16 inch feed in all cases. First Test—Very hard tool steel, , was turned at 15 feet per was run about 20 minutes and wasnot used up when removed. Mushet toolwhich replaced it only lasted about 23 sec-onds. Second Test—Cast iron; 50 feet perminute. Tool run about 16 minutes andwas O. K. Mushet lasted 20 seconds; thenother was replaced and turned out thehard ring left by burning mushet tool. Third Test—Soft steel,.10 to .20 car-bon, turned 120 feet per minute. Tool wasall right after running IS minutes, duringwhich time it was seen to be red hot at. CLAMP FOR H.^NDLING LUMBER—SOUTHERN RAILWAY. the fact that considerably over 10,000 testshave been made, costing over $100,000 inlabor and material alone, over 200 tons ofsteel having been cut up in these experi-ments. These led to the discovery, on the partof Messrs. Taylor and White, of a processof treating steel by which its ability tostand heat and still cut has been largelyincreased. Mushet tools break down atabout 650 degrees of heat, while the Tay-lor-White steel will stand up under to 1,300 degrees, and still cut. The process, then, may be said to raisethe critical point at which the tool burnsoff the edge. How this is done is one ofthe secrets known only to those whoacquire the right to use it. The practical point. Mushet tool lasted 7 seconds andwas burned off badly. These tools are used largely for rough-ing work, and leave a good surface, evenat very high speeds, where th
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
