Patent ID: 7581473
Filing Date: 2009-09-01
Classification: B23B,B23Q,Y10T

Abstract:
1. A tool holder interchangeably attached to a machining main spindle head of a machine tool, comprising: a housing; a driving main shaft including a taper shank portion disposed in a center of the housing; a driving shaft disposed parallel to the driving main shaft and supported by a bearing; a gear mechanism for transmitting rotation between the driving main shaft and the driving shaft; a tool disposed at an end of the driving shaft; and four pull studs disposed around an outer circumference of the housing, wherein the four pull studs are gripped by four collet chucks disposed in the machining main spindle head of the machine tool to rigidly hold the housing in the machining main spindle head, and the driving main shaft is inserted into a machining main spindle of the machine tool so as to be supported by a bearing of the machining main spindle.