The drill should be packed in a special packaging box to avoid vibration collision with each other.

When in use, remove the drill from the box should be immediately installed in the spindle spring clamp or automatic change of the drill tool store. Put it back in the box when you're done.

The diameter of the drill should be measured with a non-contact measuring instrument such as a tool microscope, to avoid the cutting edge and the mechanical measuring instrument contact and be hurt.

Some CNC drilling machines use positioning rings Some CNC drilling machines do not use positioning rings, such as the use of positioning rings when the depth of its installation must be accurate, if not the use of positioning rings its drill to the spindle of the extension length to adjust the same, the multi-spindle drilling machine should pay attention to this point, to make each spindle drilling depth to be consistent. If the inconsistency may cause the drill bit to drill into the table or fail to drill through the board resulting in scrap.

The wear of the cutting edge of the drill can be checked with a 40x stereo microscope.

It is necessary to check the concentricity of the spindle and the spring chuck and the clamping force of the spring chuck, the concentricity is not good, it will cause the small diameter drill break and the aperture is large, and the clamping force is not good, and the actual speed is not consistent with the set speed, and the chuck and the drill slip.

The clamping length of the fixed handle drill bit on the spring chuck is 4 to 5 times the diameter of the drill handle to clamp firmly.

Always check the spindle press foot. The contact surface of the press foot should be horizontal and perpendicular to the spindle, and cannot be shaken to prevent broken drilling and deviation holes in the drilling.

The suction effect of the drilling machine is better, and the suction air can reduce the temperature of the drill bit, and the dust can be taken away by the colleagues to reduce the high temperature caused by friction.

The substrate lamination, including the upper and lower plates, shall be firmly positioned and levelled in the one-hole and one-slot positioning system on the drilling machine's workbench. When using the adhesive tape, prevent the drill bit from sticking chips on the tape, which may cause chip removal difficulties and drill breakage.

Ordering the drill bit of the manufacturer, when entering the factory inspection to check whether 4% of its compliance with the regulations. And 100% with 10 to 15 times the microscope to examine the notch, abrasion and cracks.

Timely regrinding of the bit can increase the use and regrinding times of the bit, extend the life of the bit, and reduce production costs and expenses. Usually measured with a tool microscope, the wear depth should be less than 0.2mm within the full length of the two main cutting edges. Remove 0.25mm when regrinding. An ordinary fixed shank drill can be reground 3 times, and a shovel head drill can be reground 2 times. Turning over too much of its drilling quality and accuracy will be reduced, resulting in the scrap of circuit board finished products. Excessive grinding has the opposite effect.

When due to wear and its wear diameter is reduced by 2% compared to the original, the bit is scrapped.