Product Name: R4 Open-Zz-2RS 6.35X15.875X4.978mm High Performance Deep Groove Ball Bearing Model NO.: R4 Open-ZZ-2RS 6.35X15.875X4.978mm Material: Bearing Steel Load Direction: Radial Bearing Rows Number: Single Separated: Unseparated Aligning: Non-Aligning Bearing Contact Angle: Normal Rotations: Smoothy Trademark: Normal Transport Package: Industrial Packing+Carton+Pallet Specification: R4 Open-ZZ-2RS 6.35X15.875X4.978mm Origin: Cixi, Ningbo, China HS Code: 8482102000 Product Description What is a deep groove ball bearingBall bearings are composed of one or more rows of balls, placed between two coaxial rings. High resistance, they are particularly suitable for high speeds.That's why we find them in many mechanical applications. Ball bearings can be with or without seals (water and dust). Ball bearings with integrated seals contain a lubricant that is effective for life. These do not require maintenance.Our range is also composed of sealed ball bearings with, on both sides, sheet-reinforced acrylonitrile-butadiene rubber (NBR) contact seals. They are supplied ready for assembly and pre-greased.Deep groove ball bearings are simple in construction as well as easy to operate and maintain. They can run at high speeds and can support both radial and axial loads, furthermore they are robust, versatile and quiet running.How to choose a bearing from our CIXI GNYAR BEARING CO.,LTD ? MaterialsStationCarbon steel (Grinded bore/Not grinded bore)Station: not availableChrome steel (Z1 Z2 Z3)Station: availableCeremic materials (White/Black)Station: availableStainless steel (SUS420/304)Station: availableRemark: diffierent usingenviroment required diffierent kinds of bearing.Carbon steel: low speed of RPM and withoutstressrequired environment.Chrome steel: widely used,but it has diffierent kinds of grade.Ceremic materials:corrosion resitant,food machine parts, As the elastic modulus of ceramic is higher than that of steel, it is not easy to deform when force, so it is helpful to improve working speed and achieve high precision.Stainless steel: corrosion resitant.Pls feel free toinquiry !Follow us:@overseas dept.