724AC
Miniature Angular Contact Ball Bearings
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724AC Bearing Product Overview & Core Advantages
The 724AC is a precision angular contact ball bearing designed for applications demanding high rotational accuracy and reliability. This metric series bearing excels in handling combined loads, simultaneously supporting significant radial loads and axial loads in one direction. Its compact design, with a 4 mm bore, 13 mm OD, and 5 mm width, makes it ideal for space-constrained, high-performance assemblies. Available with steel or ceramic balls and manufactured to ABEC P5/P4 precision classes, it delivers exceptional high-speed capability and operational stability.
724AC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7 | Series designation for angular contact ball bearings |
| 24 | Bore diameter code (4 mm) |
| AC | 25° contact angle, optimized for high axial load capacity |
Key Configurations: This base model can be supplied as Open or Sealed. It is Universal Matchable (SU), allowing bearings to be paired in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement without selective mounting. Preload options are available to enhance system rigidity.
724AC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The single-row design with a 25° contact angle is engineered to provide high resistance to deflection under combined radial and axial loads, ensuring precise shaft positioning.
- High-Speed Performance: The use of lightweight Nylon or Phenolic cages minimizes centrifugal forces, reducing friction and heat generation, which is critical for achieving high rotational speeds. The option for ceramic balls further enhances speed capability and service life.
- Precision Operation: Manufactured to ABEC P5/P4 (ABEC-5/ABEC-7) tolerance classes, this bearing guarantees running accuracy, low noise, and low vibration for sensitive applications.
- Versatile Lubrication & Sealing: The bearing is supplied lubricated. The availability of sealed versions protects against contamination, extending relubrication intervals and service life in harsh environments.
724AC Bearing Typical Application Areas
The 724AC's combination of compact size, high precision, and robust load capacity makes it a preferred component in:
- High-Speed Spindles for precision machining and dental handpieces
- Precision Instruments and optical encoders
- Small Motors and turbo-molecular pumps
- Automotive Auxiliary Units and servo mechanisms
