Products

Double Row Cylindrical Roller Bearings of series NN30 and NNU 49 are separable radial bearings.
They are frequently used as non ? locating bearings arrangements of working spindles for machine tools.
Therefore, these bearings are often used in high precision tolerance class, frequently in combination with reduced internal clearance.

These bearings also feature high radial load capacity and are satisfactory for high speed applications, providing a very stiff and
rigid bearing arrangement. They are also commonly used with tapered bores, namely suffix K, (i.e. taper 1:12).

Design variants of Double Row Cylindrical Roller Bearings Double Row Cylindrical Roller Bearings of series NN 30.. and NNU 49..

are produced and available either with or without tapered bores, as standard (see also figure below).

Bearings of series NN 30.. comprise of a plain outer ring and an inner ring with three integral shoulders to guide the

two separate rows of rollers around the raceway. These bearings series are produced with lubrication facilities in their

outer ring, such as a circumferential lubrication groove and holes as standard, name suffix W33.

Unlike the NN30.. series the double row cylindrical roller bearings of the NNU 49.. series feature opposite internal design

characteristics, (i.e. outer ring with 3 integral shoulders around the raceway and a plain inner ring).

These bearing series also feature lubrication facilities in their outer ring as standard, also namely, suffix W33.