S71917 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71917 CDGA/P4A Bearing Product Overview & Core Advantages
The S71917 CDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional accuracy, high rigidity, and superior speed performance. As a single bearing that is Universal Matchable (SU), it can be mounted in pairs to create a preloaded set, offering outstanding operational stability. Its key advantages include the ability to accommodate combined loads (radial and axial), a compact design with a relatively small cross-section, and operation within a wide temperature range, making it ideal for high-reliability, high-precision machinery.
S71917 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71917 | Denotes the bearing series and size. The 'S' prefix often indicates a super-precision bearing. |
| CD | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| G | Indicates the bearing is supplied with a preload classification (in this context, part of the matched set designation). |
| A | Signifies an Extra Light preload, minimizing friction and heat generation for maximum speed capability. |
| /P4A | Defines the tolerance class. P4A is a very high precision grade with tight running accuracy and dimensional tolerances. |
S71917 CDGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4A tolerance class with extremely tight dimensional control (bore and OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration, which is critical for precision applications. The 15° contact angle provides an excellent balance between radial and axial load capacity.
Superior Speed Performance: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and enabling a high limiting speed of 17,000 rpm. The extra light preload (Class A) further reduces friction, allowing for cooler operation at high rotational speeds.
High Load Capacity: With a dynamic load rating of 10,395 lbf and a static load rating of 10,800 lbf, this bearing is engineered to handle significant combined loads reliably. The use of high-grade chrome steel for rings and balls ensures durability and long service life.
Universal Matching Design (SU): This bearing is universally matchable, meaning any two bearings can be paired in a duplex arrangement (e.g., back-to-back or face-to-face) to support higher loads and moments without selective assembly, simplifying inventory and installation.
S71917 CDGA/P4A Bearing Typical Application Areas
The S71917 CDGA/P4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Robotic Drives: In joints and arms requiring high accuracy and responsiveness.
- High-Frequency Motors and Spindles: Where minimal vibration and high rotational accuracy are critical.
- Medical and Dental Equipment: Such as high-speed handpieces and scanners.
- Aerospace and Defense Systems: In gyroscopes, radar equipment, and other precision instruments.
