Общий каталог Widia 2017 - страница 1484

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Solid Carbide Drills Deep-Hole Drills Application Rules 1) Pilot Drill Hole — IMPORTANT! • The point angle of the pilot drill must be greater than Recommendations: one of the following deep-hole drills to protect its cutting corners. • Use a conical (TDS*) or split-point drill to pilot • The diameter size of the pilot drill must be greater (do not use a TDG, VariDrill™, or TDS 12 x D than one of the deep-hole drills to enable easy fit or any competitive drill). and protect margin lands. The required difference • Check the pilot drill for wear, which can lead to in diameter is covered by design with the different premature wear on the TDD10* cutting edge and position of tolerance. possibly catastrophic failure. • Drill Ø = nominal Ø up to nominal +0,010mm. • TOP DRILL S™ for steel or cast iron (TDS4* series) • Depth of pilot hole: minimum 2 x D. and TOP DRILL S +™ for multiple applications • Deeper pilot holes are preferable. (TDS501* series 3 x D and TD502* series 5 x D) with a 140° point angle are recommended. • TDS503* series 8 x D and TDS504* series 12 x D is not recommended as the point angle is 132°! 2) Feed TDD10* into Pilot Hole • Max 500 RPM and recommended feed rate; Recommendations: no rapid traverse. • Run anti-clockwise, especially in horizontal • Reduce cutting speed to minimise imbalances in applications to protect the cutting edge, machine spindle/adaptor! when entering the pilot hole. • Depth: 1mm above the bottom of pilot hole. • Feed TDD10* into pilot hole 3) Drill Hole Cutting Parameters: Start recommended speed Recommendations: and feed rate at 1mm from the bottom of the pilot hole, clockwise. • DO NOT PECK OR DWELL up to 30 x D! • With long-chipping steel materials, it may be necessary to increase feed rate by 10–20% to provide optimal chip control. • For long-chipping aluminium materials, it may be necessary to decrease feed rate and increase speed. • Reduce feed rate on angled exits and crossholes by 50–60%. HP feed recommendations are usually higher than with competitive SC drills! 4) Drill Retraction Cutting Parameters: 50–500 RPM and feed Recommendations: rate 2–6 m/min. To achieve the best tool performance, we recommend using the deep-hole drill with a hydraulic chuck. Reduce cutting speed to minimise imbalances in machine spindle/adaptor! 5) Vertical Applications • If the pilot holes are close to each other, chips can • If required holes are close to each other, use smart fall into the neighboring hole. drilling strategies, make sure the pilot holes are getting • Do not enter a pilot hole that might contain chips properly cleaned, or switch to horizontal drilling. with a deep hole drill to avoid chip jamming, wear, or breakage. Horizontal drilling process preferred for optimum chip evacuation. T116 widia.com