S71920 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71920 ACDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.81 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
12870 lbf
Radial static load rating
14175 lbf
Limiting speed
16.25 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
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:
$ 391.58
/ each
In Stock
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S71920 ACDGA/P4A Bearing Product Overview & Core Advantages
The S71920 ACDGA/P4A is a super-precision double row angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. This sealed bearing features an extra light preload (Class A) and a P4A tolerance class, making it ideal for high-speed spindles and other precision machinery. Its double row design enables it to support combined loads—significant radial loads along with bidirectional axial loads—in a compact, space-saving package. The phenolic cage and premium grease lubrication contribute to its high-speed capabilities and long service life.
S71920 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| AC | Angular Contact design, optimized for combined loads. |
| D | Double row construction for high rigidity and load capacity. |
| GA | Indicates a universal matchable bearing set, allowing for flexible mounting arrangements (SU designation). |
| P4A | Super precision tolerance class, exceeding ABEC-7 standards, ensuring minimal runout and vibration. |
S71920 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design provides superior stiffness, enabling stable support under combined radial and axial loads. With a 25° contact angle, it efficiently handles thrust loads from both directions.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the pre-filled grease lubrication ensures reliable operation at the high limiting speed of 16,250 rpm.
- Precision & Accuracy: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter (100mm), outside diameter (140mm), and width (20mm), guaranteeing exceptional running accuracy.
- Sealed & Ready-to-Use: The integral seals protect against contamination and retain lubricant, offering a maintenance-free solution within the specified temperature range of -30°C to 110°C.
S71920 ACDGA/P4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and lathes requiring high precision and speed.
- Precision Instrumentation: In medical devices, optical scanners, and measuring equipment.
- High-Speed Motors & Drives: Where low vibration and high rotational accuracy are critical.
- Robotics: In articulated arm joints and precision gearboxes.
