71917 ACD/HCP4ATBTC
Hybrid Ceramic Super Precision Bearings
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71917 ACD/HCP4ATBTC Bearing Product Overview & Core Advantages
The 71917 ACD/HCP4ATBTC is a precision angular contact ball bearing configured in a Triplex Back-to-Back (TBT) matched set. Engineered for the most demanding applications, this bearing set delivers exceptional rotational accuracy and system rigidity. Its primary advantage lies in its ability to handle complex combined loads—significant radial loads and thrust loads in both directions—simultaneously. Manufactured to P4A tolerance class and featuring ceramic balls, it is the optimal choice for high-speed, high-precision, and high-reliability machinery where uncompromising performance is critical.
71917 ACD/HCP4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71917 AC | Angular Contact Bearing with a 25° contact angle. |
| D | Indicates a modified internal design for optimized performance. |
| HC | Refers to the Hybrid Ceramic construction (steel rings with ceramic balls). |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| TBT | Specifies the Triplex Back-to-Back matched arrangement of three bearings. |
| C | Indicates a Moderate Preload (Class C) applied to the matched set. |
71917 ACD/HCP4ATBTC Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The Triplex Back-to-Back (TBT) arrangement creates an exceptionally stiff bearing system, capable of resisting moment loads and managing heavy combined radial and axial loads. This configuration is ideal for applications where shaft deflection must be minimized.
High-Speed & Thermal Stability: The combination of hybrid ceramic balls and a lightweight phenolic cage significantly reduces centrifugal forces and friction, enabling a high limiting speed of 28,000 rpm. Ceramic balls also exhibit lower thermal expansion, contributing to stable preload and performance over a wide temperature range.
Precision and Longevity: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration for superior rotational accuracy. The open seal type allows for optimal lubrication management, while the pre-applied lubrication ensures immediate operational readiness.
71917 ACD/HCP4ATBTC Bearing Typical Application Areas
This high-performance triplex bearing set is engineered for the most critical machinery, including:
- High-Frequency Machine Tool Spindles (milling, grinding, drilling)
- Precision Robotic Drives and Servo Motors
- Aerospace & Defense Actuation Systems
- High-Speed Compressors and Pumps
