What Causes The Shaking Of The Drill Bit

• Posted by jeeja tools 29 October 2020 - Filed in Other - #Extra Long Wood Drill Bit  - 46 views

  Causes: {1} The back angle of the drill is too large; {2} The left and right cutting edges of the drill are asymmetrical and the swing difference is large; {3} There is no guide sleeve or the clearance between the guide sleeve and the drill bit is too large; {4} The spindle bearing is loose and the workpiece is not firmly clamped. Excessively large back angle is the main reason for jitter. The relief angle of the cutting edge during reaming is generally between 2 and 6°.

   

  The following is the drill sharpening method for reference:

  When grinding the drill bit, make the cutting edge of the drill bit face the axis of the grinding wheel and offset the axis of the drill bit and the axis of the grinding wheel to the left by an angle, so that the top angle of the drill bit can be about 118°. Hold the front of the drill with your right hand and the back of the drill with your left. The right hand is fixed, the left hand holds the tail of the drill and swings to the lower left.

  During the entire drill bit grinding process, the drill tail must not be higher than the axis of the grinding wheel, otherwise the cutting edge will be ground low and the drill bit will not go down. The force used when grinding the drill should be from small to large, that is, when grinding from the cutting edge to the back, the force used is from small to large. When grinding the drill, the apex angle of the two cutting edges must be symmetrical, generally around 118°.

  After grinding the cutting edge on one side, keep the posture unchanged, rotate the drill 180°, and then sharpen the cutting edge on the other side. The two cutting edges should be the same length, and the angle of the two edges should be symmetrical, not one high and one low. The clearance angle of the cutting edge is generally between 8 and 12° (the clearance angle of the cutting edge is generally between 2 and 6° when reaming.), do not grind the cutting edge lower than the relief angle, so that the drill is a drill Can't go down.

  In addition, the chisel edge of the drill bit should be sharpened narrower, so that the axial resistance of the drill bit during drilling can be reduced, so that the drill bit can save a lot of effort when drilling down.

  There will be many problems when the drill bit is lengthened, so when you first buy the drill bit, you can buy the drill bit that has been lengthened and completed, such as:Extra Long Wood Drill Bit