⒈ When drilling steel, please ensure adequate cooling and use metal cutting fluid.

⒉ good drill pipe steel and rail clearance can improve the accuracy of drilling and drill life

⒊ Please ensure that the magnetic seat and the workpiece between the smooth and clean.

⒋ drill sheet, to the workpiece reinforcement, drilling large parts, please ensure that the workpiece is stable.

⒌ at the beginning and end of the drilling, the feed should be reduced by 1/3.

⒍ on the drilling when there are a lot of fine powder material, such as cast iron, cast copper, etc., can not use the coolant, and the use of compressed air to help chip removal.

⒎ Please promptly remove the iron filings wound on the drill body to ensure smooth chip removal.