Общий каталог ZCC-CT 2019 - страница 1111

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TurningMillingDrillingTechnicalInformationIndex Adjusting screw Technical information Technical information – drilling A Solid carbide drills Operation notes Correct drill clamping Max. drilling length Radial run-out Wrong drill clamping B Use precision collets H = 1,5 x d1 Radial run-out <0.02 mm Don't clamp on the drill flutes. External coolant method Internal coolant method C The coolant liquid should shoot to the end Coolant pressure is about 0.5–1 mpa (coolant pressure is 2–3 mpa when D and the centre of the drill as shown in the figure. the diameter is less than 5 mm), coolant volume: 1.5–4 L/min Handling of coolants: 1. Small chip particles and dust can cause jamming in the oil hole. A fine mesh filter should be used. 2. Dirt and dust particles will adhere to the oil hole and lead to unsmooth coolant flow. Regularly change the coolant. Please ensure proper coolant supply. Interrupted cutting Thin work pieces Stepped holes Burrs and work piecechippings on exit E Reduce the feed rate when drilling interrupted cut. – First drill the larger hole, then the – Reduce the feed rate approx. by smaller hole. half when the drill exits. – We can offer multiple step and – Use a drill with a different point chamfer drills on request. angle. Machine a countersink withan end mill prior to drilling.If bending occurs, add a supporter. C 170