S71920 ACD/P4ATGC
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71920 ACD/P4ATGC
Basic Information
System of measurement
Metric
Weight
2.44 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
60 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
27900 lbf
Radial static load rating
42750 lbf
Limiting speed
16.25 X 1000 rpm
Lubrication
Grease
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
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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S71920 ACD/P4ATGC Bearing Product Overview & Core Advantages
The S71920 ACD/P4ATGC is a high-precision double row angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. Engineered to simultaneously handle combined radial and axial loads from both directions, this bearing features a compact design ideal for space-constrained, high-reliability machinery. Its P4A tolerance class ensures superior running accuracy, while the sealed construction and pre-lubrication contribute to long-term, maintenance-free operation.
S71920 ACD/P4ATGC Bearing Model Code Explained, Specifications & Naming Convention
The model number S71920 ACD/P4ATGC provides detailed technical specifications:
- S: Bearing with a 15° contact angle (super-precision series)
- 7: Angular contact ball bearing
- 1920: Dimension series; 19 for width series, 20 for diameter series
- ACD: 25° contact angle and optimized internal design for high load capacity
- P4A: High precision tolerance class, stricter than ABEC 7
- TGC: Phenolic (textile laminate) cage, offering high-speed capability and reduced weight
S71920 ACD/P4ATGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides superior radial and axial stiffness, enabling the bearing to support significant combined loads and moment loads effectively.
- Precision & High-Speed Performance: Manufactured to a P4A tolerance class for exceptional running accuracy. The lightweight phenolic cage (TGC) minimizes centrifugal forces, contributing to a high limiting speed of 16,250 rpm.
- Optimized Internal Geometry: Features a 25° contact angle and is Universal Matchable (SU), allowing bearings to be mounted in pairs or sets without selective matching to achieve a specific preload.
- Ready-to-Use & Durable: Pre-lubricated with grease and sealed for life, ensuring immediate installation and reliable performance within a wide temperature range of -30°C to 110°C.
S71920 ACD/P4ATGC Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Speed Industrial Pumps & Compressors
- Precision Gearboxes
- Medical and Laboratory Equipment
- Robotic Arm Joints and Precision Axes
