Many people should have wood drill bits at home, and in some special environments, we need to use extra long wood drill bit , so what should we pay attention to when using extra long wood drill bits?

Usually, a 40x stereo microscope can be used to check the wear of the cutting edge of the drill.

Always check the concentricity of the spindle and the collet chuck and the clamping force of the collet chuck. Poor concentricity will cause small-diameter drills to break and large apertures. If the clamping force is not good, it will cause the actual speed to be different from the setting. The rotation speed does not match, slipping between the chuck and the drill bit.

The clamping length of the fixed shank drill on the spring chuck is 4 to 5 times the diameter of the drill shank to be clamped firmly.

Always check the spindle presser foot. The contact surface of the presser foot should be horizontal and vertical to the main shaft without shaking to prevent broken drills and offset holes in the drilling.

Of course, there are other things to pay attention to. There are also many other things to pay attention to when using TCT circular saw blades .