71805 ACD/HCP4
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71805 ACD/HCP4
Basic Information
System of measurement
Metric
Weight
0.019 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
37 mm
Outside diameter tolerance
-0.006mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
20
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
878 lbf
Radial static load rating
686 lbf
Limiting speed
63 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:
$ 255.61
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71805 ACD/HCP4 Bearing Product Overview & Core Advantages
The 71805 ACD/HCP4 is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed operation. Its primary advantage lies in its ability to support significant combined loads—handling both radial and substantial one-directional axial loads simultaneously. This is achieved through an optimized 25° contact angle and a P4 (ABEC-7) tolerance class, ensuring exceptional running accuracy. The combination of a phenolic cage and ceramic balls further enhances its performance, making it an ideal choice for compact, high-rigidity spindle arrangements.
71805 ACD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71805 | Basic bearing series, defining the core bearing dimensions (25mm bore, 37mm OD, 7mm width). |
| ACD | Designates a 25° contact angle and optimized internal geometry for high axial load capacity and rigidity. |
| HC | Indicates the use of Hybrid Ceramic components (ceramic balls with steel rings). |
| P4 | Specifies the tolerance class, equivalent to ABEC-7, for ultra-high precision applications. |
71805 ACD/HCP4 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The optimized 25° contact angle and robust internal design provide excellent resistance to deformation under combined loads, ensuring stable performance in demanding conditions.
- Superior High-Speed Performance: The lightweight phenolic cage and low-density ceramic balls reduce centrifugal forces, enabling a high limiting speed of 63,000 rpm. This design minimizes friction and heat generation.
- Enhanced Durability & Precision: Ceramic balls offer superior hardness, lower thermal expansion, and electrical insulation properties compared to steel, leading to extended service life and maintained high precision.
- Preload Availability: The bearing is supplied with a preload, which eliminates internal clearance and increases system stiffness, critical for applications requiring high positional accuracy.
71805 ACD/HCP4 Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance applications, including:
- High-Frequency Spindles for PCB drilling and milling
- Precision Machine Tool main shafts and ball screws
- High-Speed Robotics and automation arms
- Medical Device motors and dental handpieces
- Aerospace instrumentation and auxiliary systems
