High speed spindle unit and driver
Patent 5322494 Issued on June 21, 1994. Estimated Expiration Date: 
August 26, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 26, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2286292 3688362 3757637 3775837 3811179 Automatic tool changing method and apparatus Tool changer machining center Tool changer for vertical spindle machine Machine tool Automatic tool exchanging apparatus of machine tool InventorsAssigneeApplicationNo. 112647 filed on 08/26/1993US Classes:483/12, WITH SIGNAL OR INDICATOR408/239R, With tool-retaining means409/230, Detachable or repositionable tool head409/231Cutter spindle or spindle supportExaminersPrimary: Briggs, William R.Attorney, Agent or FirmForeign Patent References
International ClassesB23Q 003/157B23B 029/00 B23C 005/26 AbstractHigh speed cutting with machine tools is achieved with readily available bearings of a small diameter by mounting and presetting the cutting tool directly in a spindle of a spindle unit without employing a tool holder. Preferably, the spindle unit is small like a tool holder and can be easily changed with conventional kinds of tool changing apparatus. The elimination of the tool holder allows the conventional bearings to be kept small so that they may be operated at high speeds, e.g., 20,000 to 40,000 rpm, without excessive heat that would damage the bearings. | |
