S71901 CDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71901 CDGB/P4A Bearing Product Overview & Core Advantages
The S71901 CDGB/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing with a Universal Matchable (SU) designation, it can be universally paired with another identical bearing to form a precisely preloaded duplex set. Its P4A tolerance class ensures ultra-precise dimensions and running accuracy, making it ideal for high-rigidity spindles and other precision machinery where minimal runout and superior stability are critical.
S71901 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Denotes the bearing series and size. 719 is a super-precision angular contact ball bearing series with a 12mm bore, 24mm OD, and 6mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates a Light preload (Class B), which increases bearing rigidity and minimizes axial and radial play for enhanced precision. |
| G | Signifies that the bearing is Universal Matchable (SU), allowing for flexible mounting arrangements (back-to-back, face-to-face, or tandem) when paired. |
| B | Specifies a Phenolic (resin) cage, which contributes to lower friction, reduced weight, and superior performance at high speeds. |
| /P4A | Defines the tolerance class, representing extremely high precision for bore diameter, outer diameter, width, and running accuracy. |
S71901 CDGB/P4A Bearing Structural Features & Performance Benefits
This bearing's design delivers distinct performance advantages in demanding applications. The 15° contact angle and optimized internal geometry provide an excellent balance for handling combined radial and axial loads simultaneously. The Light preload (Class B) eliminates internal clearance, resulting in significantly increased system rigidity and precise shaft positioning, which is critical for machining accuracy. The use of a phenolic cage is a key enabler for high-speed performance, as it offers excellent strength-to-weight ratio and smooth operation with minimal centrifugal forces. Manufactured to P4A precision tolerances, this bearing ensures low vibration, minimal heat generation, and extended service life in precision spindles.
S71901 CDGB/P4A Bearing Typical Application Areas
The S71901 CDGB/P4A is engineered for high-performance machinery where precision and speed are paramount. Its primary applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: CNC rotary tables, indexing heads, and robotic arm joints.
- High-Frequency Motors: Spindles for PCB drilling and small precision motors.
- Medical and Dental Equipment: High-speed handpieces and laboratory automation instruments.
- Aerospace Instrumentation: Gyroscopes and navigation systems.
