Patent ID: 7938603

Claim:
A spindle head ( 1 ) for a machine tool, comprising: a spindle unit ( 4 ) configured to rotate, by an incorporated spindle motor ( 5 ), a spindle ( 3 ) having an end to which a tool ( 2 ) is attached; and a support head ( 6 ) configured to support the spindle unit ( 4 ) and including a pair of fork arms ( 7 ) spaced in a direction of a turn axis (A-axis) of the spindle unit ( 4 ) and a pair of support shafts ( 9 , 30 , 31 ) turnably supported by bearings ( 13 ) in the fork arms ( 7 ) and coupled to the spindle unit ( 4 ), wherein the support shafts ( 9 , 30 , 31 ) have through holes ( 12 ) in which a plurality of wires ( 22 ) extending from the spindle unit ( 4 ) are laid, and wherein the plurality of wires ( 22 ) are divided into two wire groups, and the wire groups are separately laid in the pair of support shafts ( 9 , 30 , 31 ).