BEARING DEVICE WITH LOAD SENSOR AND MAIN SPINDLE DEVICE OF MACHINE TOOL

摘要

PROBLEM TO BE SOLVED: To provide a bearing device with a load sensor for accurately measuring axial load acting on a rotary shaft by a compact sensor and a main spindle device of a machine tool. SOLUTION: This bearing device 10 with the load sensor includes an angular ball bearing 20 and a sensor unit 30 comprising an encoder 31 and a sensor 32 disposed opposite to detected surfaces 33 and 34 of the encoder 31. The encoder 31 of the sensor unit 30 is provided on an inner ring 12 while the sensor 32 is provided on an outer ring 11. COPYRIGHT: (C)2011,JPO&INPIT