drilling step

1, determine the feed rate: Feed rate is  masonry saw blades  generally rule of thumb, generally speaking from the value 0.08-0.12mm / turn, or 0.6-1.0mm / s, feed rate is more crucial during drilling elements, different the feed can be formed of different iron, the iron of different chip performance will change
2, positioning: the need to drill position to play a central anchor point or chisel alloy needle mark "ten" word lines to ensure the accuracy of the drilling position. Note that, with the center anchor point chisel hit, make sure the center chisel perpendicular to the workpiece surface, so as not to affect the smooth discharge of the cutting material core.
3, start drilling: Please adjust the granite core bits  speed of a good fit, make sure before starting a clean bottom rig magnetic base, first open magnet switch then turn the motor switch, the motor running while turning the coolant switch, when in contact drills plate, the first slow feed , about 1-2mm drill, then use the normal speed feed.
4, drilling Exit: Close the grinding wheels  spindle motor to be 1, determine the feed rate: Feed rate is generally empirically from numerical speaking generally 0.08-0.12mm / turn, or 0.6-1.0mm / s, feed rate is more critical elements of drilling, the feed amount may be different form different iron, the iron causes the different changes in chip performance.