71905 ACDTP/HCP4B
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71905 ACDTP/HCP4B
Basic Information
System of measurement
Metric
Weight
0.039 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.006mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
18
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1433 lbf
Radial static load rating
855 lbf
Limiting speed
40 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:
$ 177.02
/ each
In Stock
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71905 ACDTP/HCP4B Bearing Product Overview & Core Advantages
The 71905 ACDTP/HCP4B is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. This single-row bearing features a 25° contact angle and is supplied with a preload, ensuring high system rigidity and precise rotational accuracy from the moment of installation. Its compact design, with a 25 mm bore and 9 mm width, makes it ideal for space-constrained, high-speed applications. The combination of a ceramic ball material and P4 (ABEC-7) tolerance class guarantees superior performance under demanding conditions, offering high-speed capability and extended service life.
71905 ACDTP/HCP4B Bearing Model Code Explained, Specifications & Naming Convention
The model number 71905 ACDTP/HCP4B provides detailed technical specifications through its suffixes:
- 71905: Basic model number denoting a metric, single-row angular contact ball bearing with a 25mm bore and 42mm outside diameter.
- AC: Angular Contact design.
- D: Specific internal design and contact angle (25°).
- TP: Indicates the Phenolic (synthetic resin) cage, which is lightweight and suitable for high-speed operation.
- HC: Denotes the use of Hybrid Ceramic balls (Silicon Nitride).
- P4: Specifies the P4 tolerance class (equivalent to ABEC-7), indicating very high precision.
- B: Indicates a specific preload level.
71905 ACDTP/HCP4B Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 25° contact angle and factory-applied preload eliminate internal clearance, providing high axial and radial rigidity. This is critical for applications requiring minimal deflection and high positional accuracy.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls reduces centrifugal forces, enabling a high limiting speed of 40,000 rpm. This makes it an excellent high-speed bearing.
- Extended Service Life and Reliability: Hybrid ceramic balls offer superior hardness, reduced friction, and electrical resistance compared to steel. They also operate effectively with minimal lubrication, enhancing reliability in demanding environments.
- Optimized for Precision Applications: Manufactured to a P4 tolerance class, this bearing ensures consistent, high-precision performance with minimal run-out, which is essential for machine tool spindles and other precision equipment.
71905 ACDTP/HCP4B Bearing Typical Application Areas
This bearing is engineered for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and spindle drives requiring high accuracy and responsiveness.
- High-Speed Motors and Spindles: Electric motors, PCB drilling spindles, and dental handpieces.
- Aerospace and Defense: Gyroscopes, navigation systems, and auxiliary power units (APUs).
- Medical Equipment: Centrifuges and high-speed dental drills.
