NACHI spherical Roller Bearing comes from NACHI-FUJIKOSHI CORP,JAPAN who founded in December 21,1928,he expanded its operations into fields of tools and bearing based on quality materials,the only one company in the world is so involved in machining equipment like tools ,robots ,bearings,hydraulic equipment and materials.spherical roller bearing must adopt high quality chrome steel materials and also carburizing steel for special applications,it can sustain radial and axial loads.for the size and configuration of NACHI spherical roller bearing,you can see the the following table:
we can see that there are the similar design with the other brand spherical roller bearing,NACHI spherical roller bearing have pressed steel and brass cage also,Most of NACHI spherical roller bearing have lubrication groove and lubrication holes on the outer ring,so its easy to feeding lubricant when maintenance for the machine,the suffix of NACHI spherical roller bearing W33 mean lubrication holes and groove,for example 22330EW33,W20 mean lubrication holes,for example 22330EW20.
Radial Internal Clearance of Spherical Roller Bearings with Cylindrical Bore (ISO)
Radial Internal Clearance of Spherical Roller Bearings with Tapered Bore (ISO)