S71924 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71924 ACE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.97 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
120 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
165 mm
Outside diameter tolerance
-0.01mm to 0
Width
22 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
24
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
10102 lbf
Radial static load rating
8550 lbf
Limiting speed
11.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1978.37
/ each
In Stock
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S71924 ACE/HCP4A Bearing Product Overview & Core Advantages
The S71924 ACE/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This sealed bearing features a single, preloaded arrangement and is manufactured to a P4 (ABEC-7) tolerance class, ensuring superior running accuracy. Its key advantage lies in its ability to support high combined loads (radial and axial) simultaneously, facilitated by a 25° contact angle. The use of ceramic balls and a phenolic cage contributes to its high-speed capability, low heat generation, and extended service life, making it an ideal solution for high-performance spindle systems.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S | Angular Contact Ball Bearing |
| 7 | Bearing series (dimensions and performance characteristics) |
| 1924 | Size code: 120 mm bore, 165 mm OD, 22 mm width |
| ACE | Designates a 25° contact angle and specific internal design optimized for high stiffness and speed. |
| HC | Hybrid Ceramic: Indicates the use of ceramic balls (typically silicon nitride). |
| P4A | Precision class P4 (ABEC-7) with specific running accuracy tolerances. |
S71924 ACE/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear. This enables higher limiting speeds (11,500 rpm), reduced thermal expansion, and longer lubrication life compared to all-steel bearings.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability at high speeds, contributing to smooth operation and reduced centrifugal forces.
- Preloaded Single Bearing: The bearing is supplied with a light preload, eliminating internal clearance. This results in high rigidity, precise rotational accuracy, and improved system dynamic response, which is critical for applications like machine tool spindles.
- Sealed & Lubricated for Life: The integrated seals protect against contamination and retain the high-performance grease. This sealed design makes the bearing maintenance-free and ensures consistent performance throughout its operational life within the specified temperature range of -30°C to 110°C.
- Superior Load Capacity: With a dynamic load rating of 10,102 lbf and a static load rating of 8,550 lbf, this bearing is engineered to handle significant combined radial and axial loads reliably.
S71924 ACE/HCP4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motor Spindles: Applications requiring minimal runout and high rotational accuracy.
- Medical Equipment: Dental handpieces and high-speed surgical drills.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
