To easily measure a cage rotating speed for a roller bearing with the large pin-type cage, with high accuracy at low cost without performing any processing on the cage.
In this method of measuring the cage rotating speed of the roller bearing with the pin-type cage, a gap between a flat part 18a of a cage side plate 18 and a welding projecting part 20 is detected by a displacement sensor 30 having a measurement range of 8 mm or more, its detection signal is converted into the cage rotating speed, and the axial movement of the cage movable in the direction separating from the sensor 30 within the measurement range, and the axial movement of the cage movable in the direction close to the sensor 30 within a range not bringing the cage 17 into contact with the sensor 30 from a standard gap position S are respectively determined to be 2.5-3 mm. An operating speed of the mechanical equipment is decelerated or the mechanical equipment is stopped on the basis of the determined measured value.
SATO YUKIO
SHIBATA MASAJI
OSHIMA SATOSHI
NIPPON STEEL CORP
Yoshiaki Naito
Cui Shu Tetsu