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NN Series Double Row Cylindrical Roller Bearings from China

Product description: Double row cylindrical roller bearings have a low cross section, high load carrying capacity and high stiffness. Therefore they are mainly used in machine tools, rolling mill stands, plastic calenders, grinding mills and also large gearboxes. Our company exported double row...
Product Details:

Product description:

Double row cylindrical roller bearings have a low cross section, high load carrying capacity and high stiffness. Therefore they are mainly used in machine tools, rolling mill stands, plastic calenders, grinding mills and also large gearboxes.


Our company exported double row cylindrical roller bearings mainly in the NNU design and the NN design,such as cylindrical roller bearing. The bearings are separable, i.e. the ring with integral flanges together with the roller and cage assemblies can be mounted separately from the other bearing ring or all bearing components can be mounted separately. This facilitates the mounting, inspection and maintenance of these bearings.


Double row cylindrical roller bearing are produced with both cylindrical bore and tapered bore; bearings of the NN design are generally supplied with tapered bore. When mounting bearings with tapered bore it is possible to achieve a certain radial internal clearance or a given preload.

The bearings, except those of the NNUP design allow axial displacements between shaft and housing to take place inside the bearing itself within certain limits.

Our company exported super-precision double row cylindrical roller bearings are manufactured as standard in the NN 30 and NNU 49 series.


NN 30 series

Bearings in the NN 30 series,can provide a unique balance between load carrying capacity, rigidity and speed. They are therefore typically used as the non-tool end bearing in machine tool spindles.

NN 30 series bearings have three integral flanges on the inner ring and no flanges on the outer ring.

Grease lubrication DmN≤650000 that the limiting speed N≤650000/Dm Dm—Bearing mean diameter

Oil (minimum quantity) lubrication DmN≤810000


Application:

Machine tools,truck,train,vibrating screen,metallurgy,electrical machinery, chemical,construction machinery,cement,mining and other industries


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