S71920 ACB/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71920 ACB/P4A
Basic Information
System of measurement
Metric
Weight
0.88 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.009mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
37
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
4568 lbf
Radial static load rating
4770 lbf
Limiting speed
11 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:
$ 1571.41
/ each
In Stock
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S71920 ACB/P4A Bearing Product Overview & Core Advantages
The S71920 ACB/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. This sealed single bearing features a 25° contact angle and is supplied with a preload, enabling it to handle combined radial and axial loads simultaneously. Manufactured to P4 (ABEC-7) tolerance class, it delivers superior running accuracy, making it ideal for high-speed spindles and other precision machinery where reliability and minimal runout are critical.
S71920 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACB | Angular Contact Bearing, specific internal design and contact angle. | Optimized for handling combined loads. |
| P4A | P4 (ABEC-7) tolerance class. The "A" may indicate a specific preload or internal clearance group. | Guarantees high precision and consistent performance in demanding applications. |
S71920 ACB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and preload provide high system rigidity, enabling the bearing to effectively support significant combined radial and axial loads.
- High-Speed Performance: The lightweight phenolic resin cage ensures stability and low friction at high rotational speeds, contributing to a high limiting speed.
- Superior Precision: Manufactured to P4 tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width for exceptional running accuracy.
- Long Service Life & Reliability: Constructed from high-grade chrome steel for rings and balls, offering excellent wear resistance. The bearing is sealed and pre-lubricated, protecting against contamination and providing maintenance-free operation within its specified temperature range.
S71920 ACB/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Gearboxes
- High-Frequency Motors
- Medical and Dental Equipment
- Aerospace Instrumentation
