71907 ACD/P4ATBTB
71900 Series Super Precision Angular Contact Ball Bearings
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71907 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 71907 ACD/P4ATBTB is a precision angular contact ball bearing supplied as a triplex back-to-back (TBT) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing configuration is designed to accommodate combined radial and axial loads simultaneously. Manufactured to P4A tolerance class and featuring a light preload (Class B), it delivers superior running precision, high stiffness, and stable performance in high-speed operations, making it an ideal choice for high-performance spindles and precision machinery.
71907 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing series and size designation (35mm bore, 55mm OD, 30mm width) |
| ACD | Angular Contact Design with a 25° contact angle |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards |
| TBT | Triplex Back-to-Back arrangement of three bearings in a matched set |
71907 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The triplex back-to-back (TBT) configuration provides exceptional system stiffness, effectively resisting complex combined loads and moments. This arrangement significantly enhances the bearing's ability to handle substantial axial loads from both directions.
Precision & High-Speed Performance: Manufactured to P4A tolerance class with a phenolic cage, this bearing ensures minimal vibration and stable operation at high rotational speeds. The light preload (Class B) eliminates internal clearance, guaranteeing precise shaft positioning and improved dynamic response.
Optimized Material & Design: Constructed from chrome steel for both rings and balls, the bearing offers high durability and fatigue resistance. The combination of a 25° contact angle and 21 balls of 5.556 mm diameter provides an optimal balance between axial load capacity and speed capability.
71907 ACD/P4ATBTB Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is ideally suited for demanding applications, including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Rotary Tables and Indexing Heads
- High-Frequency Motorized Spindles
- Industrial Robotics (Articulated arm joints and rotary axes)
- Aerospace & Defense Actuation Systems and Gyroscopes
