71926 ACD/PA9ADGBGMM3
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71926 ACD/PA9ADGBGMM3
Basic Information
System of measurement
Metric
Weight
3.1 kg
Tolerance class
PA9A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
130 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
180 mm
Outside diameter tolerance
-0.004mm to 0
Width
48 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
27
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
31500 lbf
Radial static load rating
45900 lbf
Limiting speed
7.5 X 1000 rpm
Lubrication
Grease
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
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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Product Overview and Core Advantages
The 71926 ACD/PA9ADGBGMM3 is a precision angular contact ball bearing designed for applications demanding high accuracy and reliability. This universal matchable bearing is configured in a light preload (Class B) and features a 25° contact angle, enabling it to handle combined loads efficiently. Manufactured to an exceptionally tight PA9A tolerance class, it ensures superior running accuracy, making it ideal for high-speed and high-rigidity spindle arrangements.
71926 ACD/PA9ADGBGMM3 Bearing Model Code Explained, Specifications & Naming Convention
The model number 71926 ACD/PA9ADGBGMM3 provides detailed technical specifications through its suffixes:
- 71926: Basic series number, indicating a high-precision, light-series angular contact bearing.
- AC: Angular Contact design with a 25° contact angle.
- D: Signifies a Universal Matchable (SU) design, allowing two bearings to be mounted in any combination (face-to-face, back-to-back, or tandem) to achieve the desired rigidity and load capacity.
- PA9A: Denotes the ultra-precise tolerance class, with bore and outside diameter tolerances of -0.004mm to 0 and a width tolerance of -0.2mm to 0.
- DGB: Indicates a Light Preload (Class B) for reduced noise and vibration at high speeds.
- GMM3: Specifies the use of a grease lubrication suitable for a temperature range of -30°C to 110°C.
Structural Features and Performance Benefits
The bearing's performance is derived from its advanced construction:
- High Rigidity and Load Capacity: The angular contact design and universal matchable pairing allow the bearing set to support significant combined radial and axial loads. The light preload eliminates internal clearance, enhancing system stiffness and rotational accuracy.
- High-Speed Capability: The lightweight phenolic cage and optimized internal geometry contribute to lower centrifugal forces, enabling a high limiting speed of 7,500 rpm. This makes it suitable for demanding high-speed applications.
- Precision and Longevity: Manufactured from chrome steel for both rings and balls, and built to the stringent PA9A tolerance class, this bearing guarantees exceptional dimensional stability and extended service life under precise operating conditions.
71926 ACD/PA9ADGBGMM3 Bearing Typical Application Areas
This high-precision bearing is engineered for use in critical machinery where accuracy and speed are paramount. Key applications include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Aerospace Control Systems
