 J* inch and smaller, and from .007 to .015 for larger is about all that should be required. This feed is based on a peripheral speed of a drill equal to : 30 feet per minute for steel ; 35 feet per minute for iron ; 60 feet per minute for brass. It may...  The Starrett Book for Machinists' Apprentices - Σελίδα 52των Howard Parker Fairfield, Carl Stephen Dow - 1917 - 184 σελίδεςΠλήρης προβολή - Σχετικά με αυτό το βιβλίο
 | 1901 - 640 σελίδες
...when drilling steel, wrought, or malleable iron. It is based on a speed of periphery of the drill of 30 feet per minute for steel, 35 feet per minute for iron, and 60 feet per minute for brass. It will be found advisable to vary the speed given in the table somewhat,... | |
 | International Correspondence Schools - 1903 - 804 σελίδες
...when drilling steel, wrought, or malleable iron. It is based on a speed of periphery of the drill of 30 feet per minute for steel, 35 feet per minute for iron, and 60 feet per minute for brass. It will be found advisable to vary the speed given in the table somewhat,... | |
 | Stanley Holmes Moore - 1908 - 532 σελίδες
...applicable to the ordinary commercial drills. A feed per revolution of .004" to .007" for drills J" or smaller and from .007" to .015* for larger is about...a peripheral speed of a drill equal to 30 feet per min. for steel; 35 feet per min. for iron; and 60 feet per min. for brass. It may also be found advisable... | |
 | International Correspondence Schools - 1912 - 542 σελίδες
...steel drills, according to data collected by the Cleveland Twist Drill Company, Cleveland, Ohio, is equal to 30 feet per minute for steel ; 35 feet per minute for iron; 60 feet per minute for brass; a feed per revolution of .004 to .007 inch for drills \ inch and smaller, and from .007 to .015 inch... | |
 | Arthur William Judge - 1919 - 1130 σελίδες
...848-82 TABLE No. 194. — Тнв SPEED of DRILLS A feed per revolution of -004 to -007 for drills J in. and smaller, and from -007 to -015 for larger is about...based on a peripheral speed of a drill equal to : 30 ft. per minute for steel ; 35 ft. per minute for iron ; 60 ft. per minute for brass. It may aleo be... | |
 | Albert Allis Hopkins - 1921 - 628 σελίδες
...SCREWS, DRIIXS, TAPS AND DIBS The Speed of Drills A feed per revolution of .004 to .007 for drille У* Inch and smaller, and from .007 to .015 for larger...peripheral speed of a drill equal to : 30 feet per minute fox steel ; 35 feet per minute for iron ; 60 feet per minute for brass. It may also be found advisable... | |
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