707 CD/P4ADBA
Miniature Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
707 CD/P4ADBA
Basic Information
System of measurement
Metric
Weight
0.016 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
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.572 mm
Ball quantity
8
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
907 lbf
Radial static load rating
441 lbf
Limiting speed
170 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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707 CD/P4ADBA Bearing Product Overview & Core Advantages
The 707 CD/P4ADBA is a precision angular contact ball bearing supplied as a duplex back-to-back (DB) matched set. Engineered to the exacting P4A tolerance class, this bearing is designed for applications requiring exceptional running accuracy and high-speed capability. Its primary advantage lies in its ability to support combined loads (radial and axial) simultaneously, providing high rigidity and precise shaft positioning. The extra light preload (Class A) ensures smooth, quiet operation with minimal friction, making it ideal for high-precision spindles and other demanding machinery.
707 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 707 | Basic bearing series, defining the cross-section and general performance characteristics. |
| C | Designates a 15° contact angle, optimized for high-speed operation. |
| D | Indicates the bearing is part of a duplex pair. |
| P4A | Specifies the high-precision tolerance class, exceeding standard ABEC 7 levels for superior dimensional and running accuracy. |
| DB | Defines the matched arrangement as Back-to-Back. This configuration provides high moment rigidity and excellent stability under complex loads. |
707 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and complex combined loads. This design significantly increases system stability and positioning accuracy.
- Superior High-Speed Performance: The 15° contact angle and lightweight phenolic cage are optimized for high-speed applications, enabling a limiting speed of 170,000 rpm. The phenolic cage offers excellent strength-to-weight ratio and operates smoothly at high velocities.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter (7 mm), outside diameter (19 mm), and width (12 mm). This ensures consistent, high-performance operation in precision assemblies.
- Durable Construction: Components are made from high-grade chrome steel for both rings and balls, providing high fatigue life and wear resistance. The bearing is pre-lubricated for immediate operation.
707 CD/P4ADBA Bearing Typical Application Areas
This precision bearing set is ideally suited for high-performance applications where speed, accuracy, and rigidity are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instruments: Measuring devices, optical scanners, and laboratory equipment.
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
- Robotics: High-accuracy joints and arm assemblies.
