707 ACD/HCP4AH
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
707 ACD/HCP4AH
Basic Information
System of measurement
Metric
Weight
0.007 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
7 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
19 mm
Outside diameter tolerance
-0.004mm to 0
Width
6 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.572 mm
Ball quantity
8
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
544 lbf
Radial static load rating
214 lbf
Limiting speed
170 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
In Stock
Price available upon request.
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707 ACD/HCP4AH Bearing Product Overview & Core Advantages
The 707 ACD/HCP4AH is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to accommodate combined loads (radial and axial loads simultaneously), this bearing features a 25° contact angle for superior axial load capacity. Its P4A tolerance class ensures ultra-precise running accuracy, making it ideal for high-speed spindles and precision machinery. The combination of a ceramic ball material and phenolic cage contributes to lower friction, higher limiting speeds, and extended service life in demanding operational environments.
707 ACD/HCP4AH Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 707 ACD | Denotes the basic bearing series with a 25° contact angle and specific internal design optimized for high precision and speed. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride), which provide benefits such as reduced weight, higher stiffness, and superior performance at high speeds. |
| P4A | Specifies the tolerance class, representing very high precision levels for both dimensional and running accuracy, exceeding ABEC 7 standards. |
707 ACD/HCP4AH Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The single-row angular contact design combined with a P4A tolerance class provides exceptional rotational stability and minimal runout, crucial for high-precision applications.
- Superior Load Capacity: With a 25° contact angle, the bearing efficiently handles significant combined radial and axial loads.
- Enhanced High-Speed Performance: The hybrid ceramic balls and lightweight phenolic resin cage reduce centrifugal forces and friction, enabling a very high limiting speed of 170,000 rpm.
- Pre-Lubricated & Ready-to-Install: The bearing comes pre-lubricated, ensuring immediate operation and optimal performance within its specified temperature range of -30°C to 110°C.
707 ACD/HCP4AH Bearing Typical Application Areas
This precision bearing is ideally suited for:
- High-Speed Machine Tool Spindles
- Precision Grinding & Milling Applications
- High-Frequency Motors & Turbomachinery
- Medical & Dental Equipment Spindles
- Aerospace Instrumentation & Actuators
