Shanghai QueLong industry CO., LTD., professionally sales 644 bearing, 644 bearing information: model 644 inner diameter: 71.4380 outside diameter: 136.5250 thickness: 41.2750 brands: NSK bearing series: linear motion bearings, want to know more about 644 bearing information, can undertake online consulting or dial the hotline, we will serve for you in detail. 644 bearing using range is very wide, 644 bearing is mainly used in engineering machinery, machine tools, steam car, metallurgy, mining, petroleum, machinery, electric power, railway and other industries, the company sales 644 bearing price reasonable, quality assurance, all aspects of the service, do everything to meet customer demand.