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图为一种自动定心卡头。钻头固定在本体中,本体上装有止推轴承,弹簧支承在止推轴承和导套之间,导套的外圆做成一定的锥度。
The picture shows a self-centering chuck. The drill bit is fixed in the body, the body is provided with a thrust bearing, the spring is supported between the thrust bearing and the guide sleeve, and the outer circumference of the guide sleeve is made into a certain taper.