1. in the drilling of steel parts, please ensure adequate cooling and the use of metal cutting fluid.
2. good drill pipe steel and rail clearance can improve the accuracy of drilling and the life of the drill bit
3. please ensure that the magnetic seat and the workpiece between the flat and clean.
4. drilling thin plate, to strengthen the workpiece, drilling large workpieces, please ensure the stability of the workpiece.
5. at the beginning and end of the drilling, feed should be reduced by 1/3.
6. drilling when a large number of fine powder is not the material, such as cast iron, cast copper, etc., can not use coolant, and the use of compressed air to help chip removal.
7. please remove the iron chips wound on the drill body in time to ensure smooth chip removal.