71909 ACDTP/HCP4B
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71909 ACDTP/HCP4B
Basic Information
System of measurement
Metric
Weight
0.12 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.007mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
23
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2790 lbf
Radial static load rating
2025 lbf
Limiting speed
20 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 353.64
/ each
In Stock
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71909 ACDTP/HCP4B Bearing Product Overview & Core Advantages
The 71909 ACDTP/HCP4B is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and superior performance. Its design is optimized to simultaneously handle significant combined loads (radial and axial) in one direction. Key advantages include exceptional rotational accuracy due to its P4 tolerance class, high-speed capability enabled by its phenolic cage and ceramic balls, and increased rigidity for stable operation in demanding conditions.
71909 ACDTP/HCP4B Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71909 | Basic bearing series and size designation (45mm bore, 68mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| DTP | Indicates a phenolic (polyamide) cage, ideal for high speeds and low friction. |
| HC | Signifies the use of hybrid ceramic balls (silicon nitride), which reduce weight and heat generation. |
| P4 | Denotes a super-precision tolerance class (ABEC-7 equivalent), ensuring minimal runout and vibration. |
| B | Specifies a preload condition for enhanced rigidity and precise shaft positioning. |
71909 ACDTP/HCP4B Bearing Structural Features & Performance Benefits
- High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, enabling a high limiting speed of 20,000 rpm.
- Enhanced Rigidity & Accuracy: The bearing is supplied with a preload, which minimizes axial and radial play. This results in superior system stiffness and is critical for applications requiring high positioning accuracy.
- Superior Load Capacity: The 25° contact angle is optimized to handle substantial combined radial and axial loads efficiently.
- Reduced Friction and Wear: Ceramic balls are harder and smoother than steel, leading to lower operating temperatures, reduced wear, and extended service life.
- Ready-to-Use: The bearing comes pre-lubricated, simplifying installation and ensuring immediate, reliable operation.
71909 ACDTP/HCP4B Bearing Typical Application Areas
The 71909 ACDTP/HCP4B is ideally suited for high-performance machinery where precision, speed, and reliability are paramount. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Robotics: In robot arm joints and gears requiring high accuracy and responsiveness.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and small tool spindles.
- Aerospace & Defense Systems: In gyroscopes, radar systems, and other critical navigation components.
- Medical Equipment: For CT scanners and high-speed dental drills.
