S71922 ACE/HCP4ATBTB
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71922 ACE/HCP4ATBTB
Basic Information
System of measurement
Metric
Weight
2.14 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
110 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
150 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
18428 lbf
Radial static load rating
22050 lbf
Limiting speed
10 X 1000 rpm
Lubrication
Grease
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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S71922 ACE/HCP4ATBTB Bearing Product Overview & Core Advantages
The S71922 ACE/HCP4ATBTB is a super-precision angular contact ball bearing designed for the most demanding applications. As part of a triplex back-to-back (TBT) matched set, it delivers exceptional system rigidity and rotational accuracy. Its core advantages include the ability to handle combined loads (radial and axial) simultaneously, superior high-speed performance enabled by a phenolic cage and ceramic balls, and outstanding operational reliability due to its P4A tolerance class and pre-lubrication. This bearing is the ideal choice for machine tool spindles and other high-precision machinery requiring maximum stiffness and speed.
S71922 ACE/HCP4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S71922 | Basic bearing designation (719 series, 110mm bore, 150mm OD). |
| ACE | A: 25° contact angle. C: Phenolic cage. E: Optimized internal design. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for reduced friction and heat generation. |
| P4A | The tolerance class, denoting extremely high precision levels for bore, outer diameter, and width. |
| TBT | Identifies the bearing as part of a Triplex Back-to-Back pre-matched set of three bearings. |
S71922 ACE/HCP4ATBTB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity & Load Capacity: The triplex back-to-back arrangement creates an extremely stiff bearing system capable of withstanding heavy combined loads and moment loads, which is critical for maintaining machining accuracy.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls (Hybrid Ceramic) significantly reduces centrifugal forces, allowing for a high limiting speed of 10,000 rpm with minimal heat buildup.
- Enhanced Durability and Longevity: Ceramic balls are electrically resistant, harder, and smoother than steel, leading to reduced wear, longer service life, and improved reliability in challenging environments.
- Ultra-Precision Operation: Manufactured to ABEC 7 / P4A precision standards with tight bearing dimensions and runout tolerances, ensuring smooth, quiet, and vibration-free rotation essential for high-quality surface finishes.
- Ready-to-Install Solution: The set is pre-matched and preloaded (Light / Class B), simplifying installation and guaranteeing optimal performance directly out of the box.
S71922 ACE/HCP4ATBTB Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and milling spindles.
- Precision Robotics: High-accuracy robotic arms and joints.
- Aerospace & Defense: Gyroscopes, radar systems, and other precision instrumentation.
- Medical Equipment: High-speed dental handpieces and surgical drill spindles.
