Handbook of mechanical and electrical cost data, giving shipping weights, capacities, outputs, and net prices of machines and apparatus, and detailed costs of installation, maintenance, depreciation and operation, together with many principles and data relating to engineering economics (1918)
Gillette, Halbert Powers, 1869-, Dana, Richard Turner, 1876-1928, joint author · New York, McGraw-Hill · leaf 1682
150 ft. Hard 20 to 40 ft. 35 to 60 ft. 40 to 80 ft. Limits depend on the feed and depth of cut. Properly treated andground tools should stand up at these speeds at least one hourbetween grindings. All tools should have the cutting edges rubbedwith an oilstone after grinding, before putting in use.… … Cutting SPEED - RPM - DiAMEITER OF CUT-LEN5TH FIMiSHEO P£R WINUTE Fig. 1. Cutting speeds of machine tools. Cutting Speed of High Speed Steel on Turret Lathes. H. I. Brackenbury (Engineering News, Aug. 18, 1910), states that onturret lathes the highest class of high-speed steel is now largelyused,…
