Stepped drill using seven principles, you have noticed it?
Stepped drill is used to drill out the solid material through holes or blind holes, and to the existing hole reaming tool. Widely used in various types of machining mechanical processing, automotive, mold and so on.

Stepped drill Although widely used, but also has its own use of the principle, the following list them for you, so that you can make better use of the stepped drill.

⒈ when drilling steel, please ensure sufficient cooling capacity and the use of metal cutting fluid. ⒉ good drill steel and rail gap can improve the accuracy and drill hole of life ⒊ please ensure smooth and clean magnetic base and workpiece. When ⒋ drill sheet, to the workpiece reinforcement, drilling large workpieces, please ensure stable workpiece. ⒌ at the beginning and at the end of drilling, the feed rate should be reduced 1/3. ⒍ material when drilling large number of fine powder, such as iron, copper, etc., can not use the coolant, and the use of compressed air to help chip. ⒎ please clear the wound on the drill body iron, in order to ensure smooth chip evacuation.

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