71918 ACDTNHA/TBTBV003
71900 Series Super Precision Angular Contact Ball Bearings
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71918 ACDTNHA/TBTBV003 Bearing Product Overview & Core Advantages
The 71918 ACDTNHA/TBTBV003 is a precision angular contact ball bearing supplied as a matched triplex set in a back-to-back (TBT) arrangement. Engineered to P4A super-precision tolerance standards, it delivers exceptional running accuracy and dimensional stability. This configuration is specifically designed to handle combined loads (radial and axial) simultaneously while providing high rigidity and excellent operational stability in demanding applications. The phenolic cage and optimized internal geometry contribute to its suitability for high-speed operation up to 15,000 rpm.
71918 ACDTNHA/TBTBV003 Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle |
| DTNHA | Indicates a specific internal design and cage type (Phenolic) optimized for high-speed performance |
| TBT | Triplex Back-to-Back matched set arrangement |
| BV003 | Specifies a Light preload (Class B) applied to the bearing set |
71918 ACDTNHA/TBTBV003 Bearing Structural Features & Performance Benefits
Matched Triplex Set for Maximum Rigidity: The back-to-back (TBT) arrangement of three bearings creates an extremely rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise rotational alignment.
Superior Load Capacity: The 25° contact angle design provides excellent capability to handle combined radial and axial loads. With a dynamic load rating of 21,510 lbf and static load rating of 32,175 lbf, this bearing set offers reliable performance under demanding operating conditions.
High-Speed Capability: The phenolic cage and optimized internal geometry enable stable operation at limiting speeds of 15,000 rpm. The light preload ensures consistent performance while minimizing friction and heat generation at high rotational speeds.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), this bearing set guarantees exceptional running accuracy and minimal vibration for precision applications.
71918 ACDTNHA/TBTBV003 Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring extreme rigidity and accuracy
- High-Speed Machining Centers: Applications demanding stable performance at elevated rotational speeds
- Precision Gearboxes: Industrial transmission systems requiring minimal deflection under heavy loads
- Robotic Arm Joints: Precision automation equipment needing high rigidity and positional accuracy
- Aerospace Test Equipment: Measurement and testing apparatus requiring superior running accuracy
