71828 ACD/HCP4
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71828 ACD/HCP4
Basic Information
System of measurement
Metric
Weight
0.71 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
140 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
175 mm
Outside diameter tolerance
-0.01mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
10.319 mm
Ball quantity
35
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
9518 lbf
Radial static load rating
13162 lbf
Limiting speed
11 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:
$ 2082.09
/ each
In Stock
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71828 ACD/HCP4 Bearing Product Overview & Core Advantages
The 71828 ACD/HCP4 is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed performance. Its defining characteristic is the 25° contact angle, which is optimized to support significant combined loads—handling both radial and axial forces simultaneously. Manufactured to the exacting P4 (ABEC-7) tolerance class, this bearing ensures exceptional running accuracy and rotational stability. The use of a phenolic cage and ceramic balls contributes to lower friction, reduced weight, and superior performance at high rotational speeds, making it an ideal choice for high-reliability, precision machinery.
71828 ACD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71828 | Basic bearing designation, defining the standard bearing dimensions (140mm bore, 175mm OD, 18mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high-capacity internal design, typically involving optimized raceway geometry and ball complement. |
| HC | Indicates the use of Hybrid Ceramic components (ceramic balls with steel rings). |
| P4 | The tolerance class (equivalent to ABEC-7), denoting very high precision for dimensional and running accuracy. |
71828 ACD/HCP4 Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a lightweight phenolic resin cage and low-density ceramic (silicon nitride) balls significantly reduces centrifugal forces, enabling stable operation at the high limiting speed of 11,000 rpm.
- Superior Rigidity and Load Capacity: The 25° contact angle and high-capacity "D" internal design provide excellent stiffness and the ability to handle substantial combined radial and axial loads.
- Precision Performance: Manufactured to P4 tolerance, this bearing ensures minimal runout and vibration, which is critical for applications requiring high positional accuracy.
- Extended Service Life: Ceramic balls are harder, smoother, and electrically insulating, leading to reduced wear, lower operating temperatures, and enhanced resistance to electrical erosion.
- Preload Availability: The bearing is supplied with a preload, which eliminates internal clearance for improved shaft positioning accuracy and system rigidity.
71828 ACD/HCP4 Bearing Typical Application Areas
This high-performance angular contact ball bearing is ideally suited for demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and auxiliary power units.
- High-Frequency Motors and Spindles: Where low inertia and high-speed capability are paramount.
