Peck-B-Gone: Drilling Performance
Productive Times on Sun Manufacturing Co., 832-448-http://www.ctemag.com/aa_pages/2012/1201, www.sun-mfg.com. Challenge: Efficiently drill through-holes in 4130 steel parts. Solution: A modular, indexable-insert drill that eliminated pecking cycles. Solution Provider: Kennametal Inc., 800-446-7738, www.kennametal.com.
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on Sun Manufacturing Co., 832-448-http://www.ctemag.com/aa_pages/2012/1201, www.sun-mfg.com. Challenge: Efficiently drill through-holes in 4130 steel parts. Solution: A modular, indexable-insert drill that eliminated pecking cycles. Solution Provider: Kennametal Inc., 800-446-7738, www.kennametal.com.
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Sun Manufacturing Co. is well established at making parts for the oilfield and subsea industries—companies that drill holes for a living. However, when the Houston job shop was drilling holes through the 8 “-thick flanges in a 4130 medium- to high-alloy steel part called a spool, it seemed like drilling holes to China. Each 2.375 “-dia. hole took about 30 minutes and the part has 44 such holes—24 on one side and the remainder on the other. In addition, drilling the holes made Sun’s 30-hp Kuraki KBT11Z CNC horizontal boring mill a bottleneck to accomplishing other work.
Courtesy of Kennametal
Steve Eldridge (right), shop superintendent for Sun Manufacturing Co., discusses the performance of Kennametal’s KSEM Plus modular drill (below) with David Hray, applications engineer at Kennametal.
According to Steve Eldridge, shop superintendent for Sun, the workpiece material isn’t particularly challenging to machine, having a hardness of about 212 to 235 HB and a tensile strength of about 75 ksi.
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January 2010
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