Каталог Sumitomo сверла и развертки - страница 71

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Super MultiDrill XHGS / PHT Type ■ Recommended Drilling Method (1) Drill a guide hole using the dedicated PHT type  D Select the same nominal diameter for the dedicated guide hole drill PHT type as the deep hole drill XHGS type. (The guide drill diameter is designed +0.02 mm to +0.05 mm larger than the long drill diameter) 150˚ H = Drill diameter x 1.5 to 2.0 times depth (2) Feed the deep hole drill XHGS type through the guide hole at low rotation speed  D Rotation Speed : 500min-1  D Feed Rate : 1,000 to 2,000mm/min * If the drill is inserted into the guide hole at the set cutting speed, peripheral run-out may cause Stop 1mm away from the guide hole depth shoulder damage to the drill. 1 (3) Increase rotation speed until the set cutting speed is reached, and start normal drilling operation * When using an NC machine, you may be instructed to Increase rotation speed begin normal drilling operation before the set rotation speed is reached, so it is recommended to enter a dwell instruction before normal drilling operation is instructed. (4) After drilling, rotation speed is reduced and the drill is retracted from the work material  D Rotation Speed : 500min-1  Feed Rate : 1,000 to 2,000mm/min * Retracting a drill from the work material at a high rotation speed is dangerous as doing so Change the rotation speed to 500min-1. may result in breakage due to run-out. (5) Other Notes  D A flat base should be prepared when the entrance point is not a flat surface (such as an inclined or cylindrical surface). J Spot facing using an endmill or flat multidrill MDF type (see page J34) Drilling Solid Concave endmills cannot be used Special  D When the exit point is a non-horizontal surface, decrease the feed rate to f=0.05mm/rev just before drilling through to Indexable reduce drill breakage and burrs at the exit point. Reamer Brazed ■ Coolant Others (1) Internal coolant supply  D Use JIS A1 class 1 oil or equivalent (emulsion).  D Pump pressure Steel: 1.5 to 2.0MPa (Cooling effect increases at higher pressures, affecting chips/wear) Cast Iron & aluminum alloy: 4.0 to 6.0MPa (Priority on cooling) (2) Internal MQL  D Air pressure : 0.5MPa higher  D Discharge volume : It is recommended to set the maximum discharge volume possible on the machine.   * Consult the manufacturer before using with aluminum alloy. (3) Internal dual-liquid mist  D Air pressure : 0.5MPa higher  D Discharge volume : It is recommended to use the optimum value of the machine when drilling. J49