YDTech® manufacturer of precision roller bearings(NNU, NN) with two row cylinders! supplier of loose double row cylindrical roller bearings(NNU, NN) in china.

NU (short for "non-locating unit") cylindrical roller bearings are a type of cylindrical roller bearing that has a separate inner ring and outer ring, and can therefore be assembled separately. this feature allows the NU cylindrical roller bearings to accommodate axial displacement between the shaft and housing, without affecting the radial load-carrying capacity of the bearing.

NU cylindrical roller bearings have a high radial load capacity and are suitable for applications that involve heavy radial loads, such as machine tool spindles, rolling mills, and gearboxes. they can also accommodate high speeds and are available in a variety of designs, including single row, double row, and multi-row configurations.

one of the key benefits of NU cylindrical roller bearings is their ease of assembly and disassembly, which can save time and reduce maintenance costs. additionally, the separable design allows for easier inspection and replacement of individual components, reducing downtime in the event of a failure.

NU cylindrical roller bearings are a versatile and reliable solution for a wide range of industrial applications that require high radial load capacity, high speed capability, and ease of maintenance.

NNU(NNU ... K)serie double row cylindrical roller bearings

the bearing only have rib on the outer ring. There are both cylindric hole and conical hole. the axial displacement between axis and shell is not astrict, thus the bearing could not take the axial load. but, comparing with the single row cylindrical roller bearing in the same dimension, the double row bearing is capable to carry large radial load.

NNCF series:there are 3 rib on the inner ring and 1 rib on the outer ring. The bearing is allowed to one direction axial displacement. NNCL series:there are 3 rib on the inner ring and no rib on the outer ring. It is un-separated bearing.

types of precision double row cylindrical roller bearing