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The "M" series designated by the letter M satisfies most commercial applications and is available in a broad range of sizes and types up to 20" (508 mm) outside diameter.
NTN-Bower standard product lines include two basic series: the "M" series for light and medium radial loads and the "W" series for heavy to extra heavy radial loads.
Only complete bearing assemblies interchange between the "W" Max-Pak and the "M" series bearings; separable rings and roller assemblies do not.
The "W" Max-Pak series provides an average radial load rating increase of 20 percent and a life increase of 80 percent.
These increases are possible by reducing the wall thickness of the bearing rings.
This reduction provides additional space for larger rollers resulting in higher calculated ratings.
Among the various types of cylindrical roller bearings, E type and EA type have a high load capacity while maintaining standard boundary dimensions.