HC719 High Speed Series bearing

HC719 High Speed Series bearing

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Category:  HC719 High Speed Series bearing  Angular Contact Ball Bearing
Rolling Element: Steel Ball, Ceramic Balls; Generally, the steel balls are recommended for medium or high speed while the ceramic balls are recommended for high speed or special working conditions.
Seal Type: Sealed, Open
Structural Features: The design of small balls enable the bearings to have high-speed performance, high rigidity and low heat. the rings are made of bearing steel with high purity. The special technology of heat treatment, cold treatment and material modifications leads to the dramatic increase in the fatigue life of bearing.
Contact Angle: 15°and 25°. Paired bearings can support axial and radial loads.
Cage: Bakelite (outer-ring guided), Nylon (rolling-element guided), brass
Speed Factor:
when the rolling elements are steel ball,
• Grease : DmN≤1200000 (that is, limit speed N≤1200000/Dm
• Oil (minimum) : DmN≤1800000
when the rolling elements are ceramic ball,
• Grease : DmN≤1400000 (that is, limit speed N≤1400000/Dm
• Oil (minimum): DmN≤2200000
Applications: mainly used for high rotating accuracy and high rotational speed. For example, CNC lathe spindle, high speed electrical spindle for grinding, grinding wheel spindle, high speed and high precision machinery, etc.

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