7216 CDGA/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7216 CDGA/P4A Bearing Product Overview & Core Advantages
The 7216 CDGA/P4A is a single row angular contact ball bearing engineered for ultra-high precision applications. Positioned in the P4A tolerance class, it delivers exceptional running accuracy and dimensional stability. Its core advantages include the ability to accommodate combined radial and axial loads simultaneously, superior high-speed performance enabled by its phenolic cage, and universal matchability (SU) for simplified mounting in preloaded duplex arrangements. This bearing is pre-lubricated and designed for demanding scenarios requiring maximum rotational precision and rigidity.
7216 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
- 7216: Basic designation denoting a medium series bearing with 80mm bore diameter.
- C: Signifies a 15° contact angle, optimized for high-speed applications with moderate axial load capacity.
- DG: Indicates a Universal Matchable (SU) bearing. Two bearings can be paired in a back-to-back (DB) or face-to-face (DF) arrangement to support combined loads.
- A: Denotes an Extra light preload (Class A), which minimizes runout and ensures high system rigidity.
- P4A: Specifies a super precision tolerance class exceeding ABEC 7, ensuring extremely tight dimensional and running accuracy.
7216 CDGA/P4A Bearing Structural Features & Performance Benefits
High Precision and Rigidity: Manufactured to P4A tolerance standards with an extra light preload, this bearing provides exceptional running accuracy and minimizes deflection under load, which is critical for high-precision spindles.
Optimized High-Speed Performance: The phenolic resin cage is lightweight and possesses excellent slip characteristics, contributing to lower friction, reduced heat generation, and a high limiting speed of 28,000 rpm.
Superior Load Capacity: The 15° contact angle and high-grade chrome steel construction enable it to handle significant dynamic and static loads (19,170 lbf and 16,875 lbf respectively).
Universal Matching Design: As a Universal Matchable (SU) bearing, any two 7216 CDGA/P4A bearings can be directly paired without selective matching, simplifying inventory and assembly for duplex sets.
7216 CDGA/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance machinery where speed, accuracy, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotic Drives: Joints and actuators requiring minimal backlash.
- High-Frequency Motors and Spindles
- Medical and Dental Equipment: High-speed handpieces and scanners.
- Aerospace Instrumentation: Gyroscopes and navigation systems.
