S71926 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71926 ACD/P4A
Basic Information
System of measurement
Metric
Weight
1.58 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
130 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
180 mm
Outside diameter tolerance
-0.01mm to 0
Width
24 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° to 110 °C
Radial dynamic load rating
19598 lbf
Radial static load rating
22950 lbf
Limiting speed
6.7 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 2103.35
/ each
In Stock
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S71926 ACD/P4A Bearing Product Overview & Core Advantages
The S71926 ACD/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. As a single-row bearing, it is engineered to accommodate high combined loads—significant radial loads and unidirectional axial loads—simultaneously. Manufactured to a P4 (ABEC-7) tolerance class, it guarantees superior running accuracy. Its preload availability ensures minimal axial and radial play, resulting in high system stiffness, precise shaft positioning, and smooth operation at high speeds, making it an ideal choice for high-performance spindles and precision machinery.
S71926 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision angular contact ball bearings. |
| 1926 | Specifies the bearing size: 130 mm bore, 180 mm OD, 24 mm width. |
| ACD | Signifies a 25° contact angle and is optimized for high rigidity and axial load capacity. |
| P4A | Denotes a P4 tolerance class (equivalent to ABEC-7), representing a very high level of precision. |
S71926 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and availability of preload provide high resistance to deflection, enabling the bearing to handle significant combined loads with superior stability.
- High-Speed Performance: The lightweight and robust phenolic resin cage ensures excellent dimensional stability and low friction, contributing to a high limiting speed of 6,700 rpm. The bearing comes pre-lubricated for immediate operation.
- Exceptional Precision: Manufactured to P4 tolerance with tight dimensional controls on the bore diameter, outside diameter, and width, ensuring minimal runout and vibration for ultra-precise applications.
- Durability and Reliability: Constructed from high-grade chrome steel for both rings and balls, the bearing offers high fatigue life and resistance to wear. The sealed design protects against contamination.
S71926 ACD/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for applications where high speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units (APUs).
- High-Frequency Motors and Spindles: Where low vibration and high rotational accuracy are critical.
