Quality Control CertificatesISO 9001:2015 ID3/4 Inch Tolerance RatingABEC3 Vibration levelV2+ Bearings MaterialChromium AISI 52100 Steel InsertSet Screw Locking HousingCast Iron 100% HT-200 SealsTriple seals ScrewTwo set screw with a grease nipple Temperature Rating-20F to 220F Mounting and QualityFYH Type RPM Limit4000 Load Rating (KN)Dynamic:12.8 Static: 6.65