| 摘要 |
PURPOSE: An oilless master spindle is provided to remove the need of lubricant supply during punching or drilling of a work piece. CONSTITUTION: An oilless master spindle comprises a spindle body(10), a chip cover, a bushing nut(20), a shaking correction cap(22), a first lubricant containing material, and second and third lubricant containing materials(62,66). The spindle body is integrally formed with a spindle threaded part(12). The chip cover has a top coupling part which is connected to the top of the spindle body. The shaking correction cap is fitted in a gap between the spindle body and the chip cover. The first lubricant containing material is inserted in a first hole crossing a mounting hole. The second lubricant containing material is placed in the bushing nut and fixed with a snap ring. The third lubricant containing material is installed in a first mounting groove formed in the inner peripheral surface of the lower end part of the bushing nut.
|
