7211 CDGA/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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7211 CDGA/P4A Bearing Product Overview & Core Advantages
The 7211 CDGA/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single bearing with Universal Matchable (SU) designation, it can be precisely paired with other bearings to form optimized sets of up to four units. Its extra light preload (Class A) ensures minimal deflection under operational stresses, making it ideal for high-speed applications up to 34,000 rpm while maintaining stability. The bearing is pre-lubricated and constructed from high-grade chrome steel for longevity and reliable performance in a standard temperature range.
7211 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CDGA | Indicates a 15° contact angle and specific internal design for high-precision, universal matching capabilities. The "A" denotes Extra Light Preload (Class A). |
| P4A | Specifies the tolerance class P4A, representing very high precision levels with tight control over bore, outside diameter, and width tolerances. |
7211 CDGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The angular contact design with a 15° contact angle provides superior axial and radial load capacity simultaneously. Manufactured to P4A tolerance class, it ensures minimal runout and vibration for precise shaft positioning.
Optimized High-Speed Performance: The phenolic resin cage offers low weight and excellent performance at high rotational speeds, contributing to the bearing's limiting speed of 34,000 rpm. This makes it suitable for demanding high-speed spindle applications.
Universal Matching Capability: As a Universal Matchable (SU) bearing, it can be selectively assembled with other identical bearings to form pre-loaded sets (up to 4 bearings), simplifying installation and ensuring optimal system performance without additional adjustment.
Superior Material Construction: Manufactured from high-carbon chrome steel for both rings and balls, the bearing provides high hardness, wear resistance, and a long operational life under dynamic and static loads.
7211 CDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring high rigidity and speed.
- High-Speed Motors and Spindles: Applications where minimal friction and heat generation are critical.
- Precision Instrumentation: Medical devices, optical scanners, and measuring equipment.
- Robotics and Automation: High-accuracy rotary joints and arm assemblies.
