709C
Miniature Angular Contact Ball Bearings
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Part No.
Part No.
709C
Basic Information
System of measurement
Metric
Weight
0.015 kg
ABEC rating
P5(ABEC-5),P4(ABEC-31)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
9 mm
Outside diameter
24 mm
Width
7 mm
Contact angle
15 °
Performance
Radial dynamic load rating
8767.2 lbf
Radial static load rating
337.2 lbf
Grease limited speed
58000 r/min
Oil limited speed
62000 r/min
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Preload
Available
Materials
Ball material
Steel,Ceramic
Cage material
Nylon,Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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709C Bearing Product Overview & Core Advantages
The 709C is a high-precision angular contact ball bearing engineered for applications demanding exceptional speed capability and rigidity. This precision bearing is designed to accommodate combined loads—simultaneously handling significant radial loads and axial loads in one direction. Its compact design, with a bearing size of 9 mm bore and 24 mm outside diameter, makes it ideal for space-constrained, high-reliability applications. Available in both sealed and open configurations, it offers flexibility for various operational environments.
709C Bearing Model Code Explained, Specifications & Naming Convention
| Suffix / Prefix | Technical Meaning |
|---|---|
| 709C | Basic model number denoting a metric, angular contact ball bearing with a 15° contact angle. |
| Sealed / Open | Indicates availability with integral seals for contaminant exclusion or in an open configuration for direct lubrication systems. |
| SU | Universal Matchable. Bearings can be paired in any combination (back-to-back, face-to-face, or tandem) to achieve desired preload and rigidity. |
| P5 / P4 | ABEC precision classes (P5/ABEC-5 and P4/ABEC-7) ensuring extremely tight tolerances for high-precision, low-vibration operation. |
709C Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The optimized internal geometry and 15° contact angle provide high rigidity, enabling stable performance under combined loads.
- Superior High-Speed Performance: The availability of lightweight Nylon or Phenolic cages minimizes centrifugal forces, contributing to the exceptionally high grease limited speed of 58,000 r/min and oil limited speed of 62,000 r/min.
- Precision Engineering: Manufactured to ABEC P5/P4 precision grades, this bearing ensures minimal runout and vibration, which is critical for sensitive applications.
- Material Versatility: Options for steel or ceramic balls allow for customization based on requirements for speed, stiffness, and non-magnetic properties.
- Preload and Matched Sets: The Universal Matchable (SU) designation means bearings are supplied with selective tolerances, allowing for easy creation of preloaded pairs to maximize system stiffness.
709C Bearing Typical Application Areas
This high-speed bearing is ideally suited for demanding applications where precision and speed are paramount. Key industries and equipment include:
- High-Speed Spindles for CNC machining centers and PCB drilling machines
- Precision Instrumentation and medical devices
- Turbochargers and small gas turbine engines
- High-Frequency Motors and servo drives
