71905 CE/P4ADT
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71905 CE/P4ADT Bearing Product Overview & Core Advantages
The 71905 CE/P4ADT is a precision angular contact ball bearing designed for high-performance applications requiring exceptional rotational accuracy and rigidity. This duplex tandem (DT) arrangement bearing set is preloaded, delivering superior axial and radial load capacity in a compact design. Manufactured to P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed spindles and precision machinery where reliability is critical.
71905 CE/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
- 71905: Basic bearing designation (25mm bore, 42mm OD, 18mm width)
- C: 15° contact angle optimized for combined loads
- E: High-capacity design with increased ball count and size
- P4A: Ultra-precision tolerance class for minimal dimensional variation
- DT: Duplex Tandem arrangement for increased axial load capacity in one direction
71905 CE/P4ADT Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex tandem arrangement creates a rigid bearing system capable of handling significant combined radial and axial loads. The 15° contact angle and increased ball complement (16 balls) provide superior load distribution.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for applications requiring high rotational accuracy.
High-Speed Capability: The phenolic cage material offers excellent performance at high rotational speeds (limiting speed: 83,000 rpm), providing reduced friction and improved lubrication retention.
Optimized Design: Chrome steel construction throughout (rings and balls) ensures durability and long service life under demanding operating conditions within the temperature range of -30°C to 110°C.
71905 CE/P4ADT Bearing Typical Application Areas
The 71905 CE/P4ADT finds extensive use in precision applications requiring high-speed operation and exceptional accuracy:
- Machine tool spindles for milling, grinding, and turning centers
- High-frequency motor spindles in manufacturing equipment
- Precision instrumentation and measuring devices
- Medical equipment spindles requiring sterile operation
- Aerospace positioning systems and guidance mechanisms
