Spindle for machine tools
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United States of America Patent
Stats
-
Jan 16, 2001
Grant Date -
N/A
app pub date -
Oct 4, 1999
filing date -
Mar 28, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A machine tool spindle (1) having a through hole capable of housing a collect (30) which grips a tool holder (31) and a draw bar (27) to which the collect (30) is attached, and a tapered inner surface which holds the tool holder; the spindle being made of ceramic as a single cylindrical body. The single cylindrical body has a pair of enlongated holes (2) through which a pin (24) which moves the draw bar (27) in the axial direction of the spindle (1) penetrates. The spindle (91) is preferably made of silicon nitride ceramic, and has a thickness greater than about 0.1 times its outer diameter and greater than about 0.02 times its length.
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