Japanese seiko developed for the use of the elevator hoist roller bearing -- "elevator with quiet low vibration automatically adjustable roller bearing" series.Not only turned the sound down to 1/5 of the past, also reduce the gap to about 1/2.

Elevator hoist by acting on the shaft radial load is very big, so can make the shaft of the flexure.Therefore, most of hoist will use automatic tuning roller bearing, absorb the flexure.In recent years, due to the high speed of the lift and large-scale development, so the new product is to reduce the vibration and rotation noise.

In particular, the new series of roller is improved, the roughness of the inner ring and outer ring groove and roundness.The roundness and roller diameter difference for past 1/2, roughness of about three-quarters of roller in past.In addition, both inside and outside circle orbit plane roundness also reached the standard about one-third, roughness of about 2/3.