Mapal Introduces New PCD Screw Hole Drill

At the 2007 EMO exhibition in Hannover, Mapal introduced the new WWS screw drill bit called "HP-Tap-Drill" (see photo). It is said that since the drill uses PCD material throughout the tapping length, tool life has been greatly improved compared to diamond-coated or uncoated solid carbide tapped drills currently occupying a major market share. . In addition, the PCD tapped hole drill provides high reliability in high precision machining. Especially in the high-volume processing of high-silicon aluminum alloy materials, HP-TapDrill has achieved excellent results.
For example, a user has been machining a cylinder crankcase of AlSi material with a M8 PCD tapped hole drill for more than a year. Previously, when machining with a solid carbide tapped hole drill, a tool change was required for every 15,000 threads processed. The HP-Tap Drill drill is now machined at 875r/min spindle speed and 1250mm/min feed rate. After cutting more than 350,000 threads, the drill bit still shows no signs of wear, which means the tool life is increased by 22 Times.
Another user also used the HP-TapDrill bit for the M8 and M10 threads of the AlSi cylinder crankcase. Previously, only 20 workpieces could be machined with a normal screw hole drill, and the HP-TapDrill drill can continue to be used after more than 300 workpieces and 11,000 threads have been machined, and the tool has no signs of wear. Good surface quality and dimensional stability. In addition to significantly increasing tool life, the HP-TapDrill bit reduces machining time by 60%.

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