7213 ACDGB/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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7213 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7213 ACDGB/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a universal matchable bearing supplied in a set of three, it enables optimized preload configurations for superior system performance. Its key advantages include the ability to handle combined radial and axial loads simultaneously, excellent high-speed capabilities up to 32,500 rpm, and outstanding operational stability due to its P4A super-precision tolerance class. This bearing is engineered for high reliability in precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7213 | Basic bearing series; 65 mm bore, 120 mm OD, 23 mm width |
| AC | Angular Contact design with a 25° contact angle |
| DGB | Universal Matchable (SU) bearing in a set; Duplex arrangement, Back-to-Back mounting, Light preload (Class B) |
| /P4A | Super-precision tolerance class, exceeding ABEC 7/ISO P4 standards |
7213 ACDGB/P4A Bearing Structural Features & Performance Benefits
Optimized Contact Angle & Rigidity: The 25° contact angle provides an ideal balance between radial load capacity and axial load carrying capability, resulting in high system rigidity and minimal deflection under operational stresses.
Precision Matched Set: Supplied as a universal matched set of three bearings with light preload (Class B), this configuration ensures consistent performance, simplified installation, and optimal load distribution in duplex arrangements.
High-Speed Phenolic Cage: The phenolic resin cage offers excellent strength-to-weight ratio, reduced friction, and superior guidance at high rotational speeds, contributing to the bearing's limiting speed of 32,500 rpm.
Super-Precision Manufacturing: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring exceptional running accuracy, low vibration, and smooth operation.
Premium Material Construction: Manufactured from chrome steel for both rings and balls, providing high hardness, wear resistance, and long service life under demanding conditions.
7213 ACDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling heads
- Precision Gearboxes: High-speed transmission systems requiring minimal backlash
- Industrial Pumps & Compressors: Applications demanding high rotational accuracy and reliability
- Robotic Systems: Precision joints and rotary actuators in industrial automation
- Aerospace & Defense Systems: Guidance systems, radar platforms, and instrumentation
- Medical Equipment: High-speed dental handpieces, imaging devices, and laboratory instruments
