707 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
707 ACDGA/HCP4A
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
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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707 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 707 ACDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This single bearing features an Extra Light (Class A) preload and is manufactured to P4A tolerance class for superior running accuracy. Its 25° contact angle is optimized to handle combined radial and axial loads simultaneously. The use of ceramic balls and a phenolic cage contributes to its capabilities as a high-speed bearing, enabling a limiting speed of 170,000 rpm. This bearing is universally matchable (SU), allowing for precise duplex arrangements to achieve higher rigidity and load capacity.
707 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 707 ACDGA/HCP4A provides detailed technical specifications:
- 707: Basic bearing series, indicating a miniature, metric size design.
- AC: Angular Contact design, enabling it to support combined loads.
- D: Signifies a Duplex ready bearing, part of a universally matchable (SU) pair.
- GA: Indicates a specific preload level – in this case, Extra Light (Class A).
- HC: Denotes the use of Hybrid Ceramic components (ceramic balls with steel rings).
- P4A: The tolerance class, specifying extremely tight dimensional and running accuracy exceeding ABEC 7.
707 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls reduces weight, minimizes friction, and provides superior performance at high speeds. It also offers increased resistance to wear and operates effectively across a wide temperature range (-30°C to 110°C).
- Precision & Rigidity: Manufactured to P4A tolerance class with an Extra Light preload, this bearing ensures minimal runout and high system rigidity, which is critical for precise positioning and smooth operation.
- High-Speed Capability: The phenolic resin cage is lightweight and robust, ideal for high-speed applications. Combined with the low-density ceramic balls, it allows the bearing to achieve a very high limiting speed of 170,000 rpm.
- Optimized Load Capacity: The 25° contact angle is engineered to efficiently support significant combined radial and axial loads (Dynamic: 544 lbf, Static: 214 lbf).
- Universal Matchability (SU): This feature allows two identical bearings to be mounted in a matched set to create a pre-loaded duplex pair, significantly enhancing axial rigidity and rotational accuracy.
707 ACDGA/HCP4A Bearing Typical Application Areas
This high-precision, high-speed angular contact bearing is ideally suited for:
- High-Frequency Spindles in PCB drilling and milling machines.
- Precision Instrumentation and laboratory equipment.
- High-Speed Automation robots and manipulators.
- Dental and Medical Handpieces.
- Aerospace Gyroscopes and navigation systems.
