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29 PC SPLIT POINT 135 DEGREE COBALT JOBBER DRILL SET IN A HUOT BIR BUDDY CASE WITH BELT CLIP. MADE FROM SOLID COBALT ALLOY STEEL. USE COBALT WHEN DRILLING STAINLESS STEEL OR ANY OTHER TOUGH ALLOY STEEL. We hope you find the following technical information useful. FEEDS AND SPEEDS FOR HIGH SPEED STEEL DRILLS. DRILL DIAMETER IN INCHES FEED IN INCHES PER REVOLUTION. SUGGESTED SPEEDS FOR SPECIAL MATERIALS. DEFINITION OF FEET PER MINUTE. The distance in feet that the workpiece surface or cutting edge travels in one minute. Surface feet per minute (sfm) is an English measurement for speed. MATERIAL. SPEEDS IN FEET PER MINUTE. ALUMINUM AND ITS ALLOYS 200-300 DIE CASTINGS (ZINC BASE) 300-400 MAGNESIUM AND ITS ALLOYS 250-400 MONEL METAL OR HIGH-NICKEL STEEL 30-50 STEEL-MILD .2 CARBON TO .3 CARBON 80-110 STEEL .4 CARBON TO .4 CARBON 70-80 ALLOY-300 TO 400 BRINELL 20-30 Ti-75A (COMMERCIALLY PURE) 40-60 *STEEL (OVER 450 BRINELL) 75-100 ( 29 pc cobalt jobber drill set- huot bit buddy case was posted and is owned by: Marylou Graves) |
m_graves@chicagopartsnetwork.com (Marylou Graves) for more information.
