S71908 CDGC/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71908 CDGC/P4A Bearing Product Overview & Core Advantages
The S71908 CDGC/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universally matchable single bearing supplied in a set of two, it enables simplified assembly of preloaded duplex arrangements. Its key advantages include the ability to handle combined radial and axial loads simultaneously, superior running accuracy from its P4A tolerance class, and reliable high-speed performance facilitated by its phenolic cage and grease lubrication. This compact and lightweight bearing is engineered for high reliability in demanding, precision-critical environments.
S71908 CDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
- S7: Denotes a series of super-precision bearings.
- 1908: Standard size designation (40mm bore, 62mm OD, 12mm width).
- CD: Signifies a 15° contact angle and universal matchable (SU) design. Two bearings can be paired in a back-to-back (DB) or face-to-face (DF) arrangement to achieve a preload.
- GC: Indicates a moderate preload (Class C) is applied to the bearing set.
- P4A: Represents an ultra-high tolerance class, exceeding ABEC 7/ISO P4 standards, ensuring extreme dimensional and running accuracy.
S71908 CDGC/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design with a 15° contact angle and the capability to be mounted in a preloaded duplex arrangement provides high systemic rigidity, enabling the bearing to effectively support combined loads.
Super-Precision Performance: Manufactured to a P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications requiring supreme rotational accuracy.
Optimized High-Speed Operation: The lightweight phenolic cage ensures stability and low friction at high speeds, contributing to the high limiting speed of 41,000 rpm. The pre-applied grease lubrication supports immediate operation and consistent performance within the specified temperature range.
Durability and Reliability: Constructed from high-grade chrome steel for both rings and balls, the bearing offers excellent fatigue life and wear resistance.
S71908 CDGC/P4A Bearing Typical Application Areas
The S71908 CDGC/P4A is ideally suited for high-precision, high-speed machinery, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Aerospace Instrumentation
- Medical and Dental Equipment
