7013 ACDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7013 ACDGB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.36 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
100 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
8775 lbf
Radial static load rating
7988 lbf
Limiting speed
31 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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7013 ACDGB/HCP4A Bearing Product Overview & Core Advantages
The 7013 ACDGB/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 25° contact angle and is supplied as part of a universally matchable set, enabling simplified preload configuration. Its construction with ceramic balls and a phenolic cage contributes to superior high-speed capability and reduced rotational mass. Manufactured to a P4A tolerance class, it guarantees extremely tight dimensional and running accuracy, making it ideal for high-rigidity, high-reliability spindle arrangements.
7013 ACDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance & Advantage |
|---|---|---|
| 7013 | Standard bearing series number (65mm bore, 100mm OD, 18mm width) | Defines the core bearing dimensions. |
| AC | Angular Contact design | Optimized for combined loads. |
| DGB | Universal Matchable (SU designation) bearing set | Allows any combination of bearings from the set to achieve a specific preload, simplifying installation and inventory. |
| HC | Hybrid Ceramic (Ceramic balls, steel rings) | Enables higher speeds, reduced friction, and longer service life, especially in lubricant-starved conditions. |
| P4A | High-Precision Tolerance Class (Superior to ABEC 7) | Ensures extremely tight running accuracy and low noise/vibration for precision applications. |
7013 ACDGB/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls (Si3N4) significantly reduces centrifugal forces and friction, enabling a limiting speed of 31,000 rpm. This construction also offers electrical insulation and superior performance in high-temperature or marginally lubricated environments.
- Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and guidance for the ceramic balls, contributing to smooth operation and high-speed capability.
- Universal Matchability (SU): Supplied in a set of three bearings that are universally matchable. This design allows for flexible mounting configurations to achieve a precise light preload (Class B), resulting in optimal system stiffness and rotational accuracy without complex selection processes.
- High-Precision Engineering: Manufactured to P4A tolerance class with very tight bore, outside diameter, and width tolerances. This guarantees minimal runout and consistent performance, which is critical for high-rigidity applications.
- Optimized Load Capacity: The 25° contact angle is engineered to provide an excellent balance between radial and axial load carrying capacity (Dynamic: 8775 lbf, Static: 7988 lbf).
7013 ACDGB/HCP4A Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery where speed, precision, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Motors and Spindles: Electric motor spindles for PCB drilling and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
