Drilling out of the hole is the overall deviation, the hole is 0.15, the cutting tool angle is not biased, the product is not how to jump, I was the first drilling after the chamfer, is how to go wrong, in this case, ask the teacher, thank you first, urgent...
Perhaps the clamping part is not strong, you look at whether the clamping, three claws excessive wear.Recommendation: 1 check the three claws.2 hydraulic chuck, increase pressure.3 chamfer first, then hit the center hole.
Hole overall bias, how much? What is not how to jump? Did you call the dial indicator? What is the actual beating?The drill hole 0.15, there are two reasons: one is that you have to drill the center hole with the center? Drill bit is not?Two is the drill axis and spindle axis coincidence? The center of the drill may be low or high, or is it crooked?There are so many uncertainties, drilling out of the hole is not too big strange.
The overall mean partial is specific bit big?1 first check the bottom of the hole with the size of the hole is the same if it can not be determined for the drill bit tilted2 drill bit size is not accurate in general has a few wire error is normalIf you are talking about the normal eccentricity the central axis of the hole is not a shaft with the central axis of the workpieceSo it is the problem of the chuck first clean the chuck jaws necessary when the car can claw a knife and then try to solve the problemIf not, that's the problem with the chuck assembly
