Patent ID: 6409441
Filing Date: 2002-06-25
Classification: B23B,Y10S,Y10T

Abstract:
Arrangement for a tool spindle having a spindle axle with a moveable pulling rod axially displaceable in the spindle axle for firmly attaching a tool, the arrangement comprising:(a) at least one spool surrounding the pulling rod, the spool being stationary in relation to the pulling rod and providing a specific current flow that differs depending on the axial position of the pulling rod in the spool; (b) a rotating part of the tool spindle chosen from a group consisting of the spindle axle and an end part of the pulling rod, the rotating part having an axial bore; and (c) a stationary unit at an end of the tool spindle opposite to the tool, the stationary unit is provided with a cooling fluid inlet for introducing coolant fluid under pressure to the axial bore, the stationary unit and the rotating part defining a gap sealing adjacent to the cooling fluid inlet to allow leakage of fluid through the gap sealing.