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NN30 Series Cylindrical Roller Bearing

NN30 Series Cylindrical Roller Bearing

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Category: NN30 Series Double-row Cylindrical Roller Bearing
Rolling Element: Steel Balls
Seal Type: Open
Structural Features: the rings are made of bearing steel with high purity or double vacuum high-temperature resistance. The special technology of heat treatment, cold treatment and material modifications leads to the dramatic increase in the fatigue life of bearing. Both single-row and double-row roller bearings have cylindrical holes and tapered holes. In order to easily adjust the radial inner clearance on the shaft, enhance the rotating accuracy and radial rigidity, the tapered hole is generally used.
Contact Angle: 15°and 25°. Paired bearings can support axial and radial loads.
Cage: Brass (rolling-element guided), limit temperature is 300°C.
Speed Factor:
• Grease : DmN≤650000 (that is, limit speed N≤650000/Dm)
• Oil (minimum) : DmN≤810000
Applications: used for the shaft with high radial rigidity and high speed. For example, CNC lathe spindle, CNC grinding wheel spindle, Aircraft engine spindle, high precise transmission machinery, etc.

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