7034 ACD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7034 ACD/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
11.9 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
170 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
260 mm
Outside diameter tolerance
-0.004mm to 0
Width
84 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
26.988 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
73125 lbf
Radial static load rating
104625 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
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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7034 ACD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7034 ACD/HCP4ADGA is a high-precision, **double row angular contact ball bearing** engineered for demanding applications requiring exceptional accuracy and rigidity. Its **universal matchable (SU)** design allows for flexible mounting configurations, while the **ceramic ball** and **phenolic cage** construction enables superior **high-speed performance**. This bearing is pre-lubricated and optimized to handle **combined loads** (radial and bidirectional axial loads) simultaneously, making it ideal for high-reliability, precision machinery where uncompromising performance is critical.
7034 ACD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| 7034 | Basic series number, indicating a 170mm bore and 260mm outside diameter. |
| ACD | Angular Contact, Double row design. |
| HCP4A | Indicates a **P4A tolerance class** for ultra-high running accuracy, paired with a phenolic cage for high-speed operation. |
| DGA | Universal Matchable (SU) arrangement. Two bearings are supplied as a precision-matched set. |
7034 ACD/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The **double row angular contact** design provides a rigid support system, capable of handling significant **radial dynamic load ratings (73,125 lbf)** and **radial static load ratings (104,625 lbf)**. The 25° **contact angle** is optimized for managing substantial axial loads in both directions.
- Superior High-Speed Performance: The combination of a lightweight **phenolic cage** and low-density **ceramic balls** reduces centrifugal forces, enabling a high **limiting speed** of 11,000 rpm. This makes it an exemplary **high-speed bearing**.
- Precision & Stability: Manufactured to **P4A tolerance class**, this bearing ensures minimal runout and vibration, which is critical for applications requiring extreme positional accuracy. The **extra light preload (Class A)** guarantees smooth, precise operation from startup.
- Optimized Material Selection: The use of **ceramic balls** offers advantages including reduced weight, lower friction, and extended service life, especially in high-speed and temperature-variable environments.
7034 ACD/HCP4ADGA Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications such as:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers demanding precision and rigidity.
- High-Frequency Motors and Spindles: Where **high-speed** and low vibration are paramount.
- Precision Instrumentation: In medical devices, optical scanners, and measuring equipment.
- Aerospace & Defense Systems: For gyroscopes, radar systems, and other critical rotating assemblies.
