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Category: B70 Series Bearing Angular Contact Ball Bearings
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.
The rings are made of bearing steel with high purity (Electro-slag remelting ESR). The unique technology of heat treatment, cold treatment, and material modifications dramatically increase bearing fatigue life.
Contact Angle: 15°and 25°. Paired bearings can support axial and radial loads.
Cage: the outer-ring-guided Bakelite. Able to work steadily under 80°C for a long term.
when the rolling elements are steel balls,
• Grease: DmN≤120000 (that is, limit speed N≤1200000/Dm
• Oil (minimum): DmN≤1800000
when the rolling elements are ceramic balls,
• Grease: DmN≤140000 (that is, limit speed N≤1400000/Dm
• Oil (minimum): DmN≤2200000
They are 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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