S71909 ACDTP/HCP4B
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71909 ACDTP/HCP4B
Basic Information
System of measurement
Metric
Weight
0.12 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
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:
$ 424.22
/ each
In Stock
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S71909 ACDTP/HCP4B Bearing Product Overview & Core Advantages
The S71909 ACDTP/HCP4B is a high-precision, single-row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy, rigidity, and speed performance. Its defining feature is the 25° contact angle and P4 (ABEC-7) tolerance class, ensuring superior running accuracy. The bearing is preloaded, enhancing system stiffness and rotational precision right from installation. Constructed with a ceramic ball and phenolic cage combination, it is optimized for high-speed operation and reduced rotating mass. Pre-lubricated and sealed, it offers reliable, long-term performance in high-rigidity applications subject to combined loads.
S71909 ACDTP/HCP4B Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71909 | Denotes the bearing series and size. 'S' often indicates a high-precision series. The bore diameter is 45 mm. |
| AC | Angular Contact design, optimized for combined radial and axial loads. |
| DT | Indicates a matched set (Duplex Tandem) configuration, though this unit is supplied as a single, preloaded bearing. |
| P | Signifies that the bearing is preloaded, providing increased rigidity and precise shaft positioning. |
| HC | Refers to the hybrid ceramic construction, featuring steel rings and ceramic balls. |
| P4B | Specifies the P4 tolerance class (equivalent to ABEC-7), denoting a very high level of precision. |
S71909 ACDTP/HCP4B Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls significantly reduces weight and centrifugal force, enabling higher limiting speeds. Ceramic also offers superior wear resistance and operates effectively with less lubrication.
- Phenolic Resin Cage: This lightweight and robust cage material is ideal for high-speed applications, providing excellent strength and guidance with minimal friction.
- Preload & High Rigidity: The bearing is supplied with a preload, which eliminates internal clearance. This results in superior system rigidity, improved rotational accuracy, and reduced vibration and noise.
- High Load Capacity: The 25° contact angle is optimized to handle significant combined loads (radial and axial), making it suitable for applications with complex loading conditions.
- Sealed & Lubricated for Life: As a sealed and pre-lubricated unit, it is protected from contamination and is designed for maintenance-free operation within its specified temperature range.
S71909 ACDTP/HCP4B Bearing Typical Application Areas
This high-performance precision bearing is ideally suited for applications where speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors & Spindles: Motors for PCB drilling and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation equipment.
- Medical Equipment: Centrifuges and high-speed laboratory apparatus.
