三爪卡盘内的平面螺纹,常因操作不慎而损伤,特别是在螺纹入口处,很容易打毛,如果把整个卡盘拆开修理,则很费事,现介绍一种简便修理方法(见图)。先拆下卡爪,将损伤处转到卡爪的开口处。用手握半圆锉,半圆锉的头部压在螺纹损伤处,用卡盘的扳手往复扳动,使平面螺纹往复转动,损伤的螺纹即被来回锉削,进行修复。如果光洁度不够高,可用砂布包在锉刀上修磨。修磨后,用棉纱包在锉刀的头部,转动平 Three-jaw chuck plane thread, often due to careless operation and damage, especially in the thread entrance, it is easy to fight hair, if the entire cartridge disassembly repair, it is cumbersome, is to introduce a simple method of repair See figure). First remove the jaws, the damage to the opening of the jaws. Semi-circular file with his hand, the semicircular file head pressure in the thread damage, with the chuck wrench reciprocating pull, so that the plane thread reciprocating rotation, the injured thread is back and forth filing, repair. If the finish is not high enough, the emery cloth can be used to grind the file. After sharpening, wrap the cotton swab over the file’s head and turn flat