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B70 Series Bearing

B70 Series Bearing




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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.
Sealed: No

Structural Features:

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.
Speed Factor
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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WhatsApp : Tony Zhao
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