... and impact loading 2 Less coefficient of friction 3 High quality HRB Bearing Itme No M249749/M249710SampleFreeDeilivery ... noisy leverV1,V2,V3,V4Tolerance codes ABEC-1 ABEC-3, ABEC-5, ABEC-7Precision ratingP0, P4, P5, ... box +carton , individual box packing or industrial standard packingApplicationautomobiles, rolling mill, mining, metallurgical, plastic machinery, etc. Number of rowSingle rowDouble ...