High-rigidity double row cylindrical roller bearings designed for heavy radial loads, precision guidance, and stable performance in machine tools, rolling mills, and industrial gear systems.
Representative NN series double row cylindrical roller bearings. Additional sizes and configurations are available upon request.
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We offer customized NN Series Bearings bearings including:
W33 (Lubrication groove and holes) |
K (Tapered bore 1:12) |
Precision grades (P4, P5, P6) |
Special clearances (C3, C4) |
Modified dimensions per request
NN series bearings are widely used in applications requiring high rigidity and radial load capacity:
NN and NNU are two precision cylindrical roller bearing series widely used in machine tool spindles, industrial gearboxes, and high-accuracy...
Read More →NN series have an inner ring with flanges and a separable outer ring, while NNU series have an outer ring with flanges and a separable inner ring. NN is more common for general applications.
NN series bearings are ideal for applications requiring high radial load capacity, high rigidity, and precise shaft guidance, such as machine tool spindles, rolling mills, and heavy-duty gear systems.
The “K” suffix indicates a tapered bore (1:12 taper), which allows the bearing to be mounted on tapered shafts or adapter sleeves for easier installation and adjustable clearance.
NN series bearings are commonly available in C0 (normal), C3, and C4 clearance classes depending on operating temperature, load conditions, and shaft fit requirements.
W33 refers to lubrication grooves and oil holes on the outer ring, which improve lubricant distribution and help extend bearing life in high-speed or heavy-load applications.
NN series bearings are widely used in machine tool spindles, rolling mills, gearboxes, and other industrial equipment requiring high radial rigidity and precision performance.