71828 CDGC/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71828 CDGC/P4 Bearing Product Overview & Core Advantages
The 71828 CDGC/P4 is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. As a single bearing with a 15° contact angle, it is optimized to support combined loads—handling significant radial loads and axial loads in one direction simultaneously. Manufactured to a P4 tolerance class, this bearing guarantees ultra-precise running accuracy and dimensional stability. Its moderate preload (Class C) ensures high system stiffness and minimizes deflection under operational stresses, making it an ideal choice for high-speed spindles and other high-rigidity precision machinery.
71828 CDGC/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71828 | Basic bearing designation, defining the core dimensions: 140mm bore, 175mm OD, 18mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| DG | Indicates a Universal Matchable (SU) bearing. Two bearings can be universally matched in a back-to-back (DB) or face-to-face (DF) arrangement to support axial loads in both directions. |
| C | Denotes a Moderate Preload (Class C), which increases system rigidity and improves rotational accuracy. |
| P4 | Signifies the tolerance class, representing superior precision in bore, OD, and width dimensions, and very tight running accuracy. |
71828 CDGC/P4 Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The P4 tolerance class and moderate preload work in concert to deliver exceptional rotational stability and minimize runout, which is critical for high-precision applications like machine tool spindles.
- Superior Load Capacity: The 15° contact angle and robust construction, featuring 35 balls of 10.319 mm diameterdynamic load rating of 10,102 lbf and static load rating of 13,950 lbf, enabling reliable performance under combined radial and axial loads.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 11,000 rpm. The open design and factory-applied lubrication facilitate efficient heat dissipation.
- Universal Matching Capability: The Universal Matchable (SU) designation allows for simplified mounting of pre-adjusted bearing pairs, ensuring optimal preload and performance in matched sets.
71828 CDGC/P4 Bearing Typical Application Areas
The 71828 CDGC/P4 is engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Industrial robotics and automation systems.
- High-Frequency Motors and Spindles: Applications demanding minimal vibration and high rotational accuracy.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
- Aerospace Actuators and Control Systems: Where reliability and precision under load are critical.
