729C
Miniature Angular Contact Ball Bearings
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729C Bearing Product Overview & Core Advantages
The 729C is a metric double row angular contact ball bearing engineered for applications requiring high precision and exceptional rigidity. Its compact design, with a 9 mm bore, 26 mm outside diameter, and 8 mm width, allows for space-saving integration. This bearing is distinguished by its ability to support combined loads (simultaneous radial and axial loads) efficiently, making it an ideal choice for high-speed, high-reliability scenarios. Available in both sealed and open variants, and with options for preload, it offers versatile performance tailored to specific application demands.
729C Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| C | 15° Contact Angle | Optimized for handling axial loads and providing high running accuracy. |
| (Sealed / Open) | Seal Type Option | Sealed versions offer contamination protection; open versions allow for custom lubrication schemes. |
| (P5 / P4) | ABEC Rating (Precision Class) | P5 (ABEC-5) and P4 (ABEC-7) grades ensure high precision, low noise, and low vibration. |
| SU | Universal Matchable | Bearings can be arranged in multiple configurations (back-to-back, face-to-face, tandem) for optimal stiffness and load capacity. |
729C Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides superior radial and axial stiffness, enabling the bearing to handle significant combined loads. With a dynamic load rating of 1101.52 lbf and a static load rating of 472.08 lbf, it offers robust performance in demanding conditions.
- High-Speed Performance: The use of lightweight nylon or phenolic cages minimizes centrifugal forces, contributing to the impressive grease limited speed of 56,000 r/min and oil limited speed of 60,000 r/min.
- Precision & Low Friction: Available in P5 and P4 precision classes, the 729C ensures high running accuracy. Optional ceramic balls further reduce friction and heat generation, extending service life.
- Versatile Lubrication & Longevity: The bearing comes lubricated from the factory. Sealed versions are effectively maintenance-free, while open versions allow for specific lubrication regimes to maximize performance and longevity.
729C Bearing Typical Application Areas
The 729C double row angular contact ball bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Speed Industrial Pumps & Compressors
- Precision Instrumentation and Medical Equipment
- Robotics and Automation Systems
- Electric Motor Spindles
