71828 ACD/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71828 ACD/P4
Basic Information
System of measurement
Metric
Weight
0.8 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
9 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 2082.34
/ each
In Stock
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71828 ACD/P4 Bearing Product Overview & Core Advantages
The 71828 ACD/P4 is a single-row angular contact ball bearing engineered for applications demanding high precision and superior rotational accuracy. Designed to accommodate primarily axial loads in one direction, as well as combined radial and axial loads, this bearing features a P4 (ABEC-7) tolerance class for exceptional dimensional stability and running accuracy. Its phenolic cage and optimized internal geometry contribute to its high-speed capability, making it an ideal solution for high-rigidity and high-speed machine tool spindles and precision equipment.
71828 ACD/P4 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 for optimal axial load capacity. |
| D | Indicates a high-capacity internal design with larger and more balls (35 balls, 10.319mm diameter). |
| P4 | Specifies the precision tolerance class (equivalent to ABEC-7), ensuring minimal runout and vibration for high-precision applications. |
71828 ACD/P4 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and high-capacity "D" internal design, featuring 35 precision balls, provide excellent resistance to combined loads and high axial loads in one direction.
- High-Speed Performance: The lightweight and robust phenolic resin cage ensures stable operation and reduced centrifugal forces, enabling a high limiting speed of 9,000 rpm.
- Precision Engineering: Manufactured to P4 tolerance class, this bearing guarantees tight dimensional control (bore/OD tolerance: -0.01mm to 0) for superior running accuracy and system performance.
- Optimized Material Selection: Rings and balls made from high-grade chrome steel offer high fatigue resistance and durability under demanding operating conditions.
71828 ACD/P4 Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (milling, grinding, and turning centers)
- High-Speed Machining Centers
- Precision Gearboxes
- Industrial Pumps and Compressors
- Medical and Laboratory Equipment
