S71930 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71930 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
2.1 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
150 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
210 mm
Outside diameter tolerance
-0.011mm to 0
Width
28 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
19.05 mm
Ball quantity
23
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
24300 lbf
Radial static load rating
28125 lbf
Limiting speed
6.7 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:
$ 2780.74
/ each
In Stock
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S71930 ACD/HCP4A Bearing Product Overview & Core Advantages
The S71930 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing features a 25° contact angle and is supplied with a preload, delivering superior running accuracy and high rigidity. Its design is optimized to handle combined loads (significant radial and one-directional axial loads) simultaneously. The use of ceramic balls and a phenolic cage contributes to its capabilities as a high-speed bearing, offering reduced friction, lower operating temperatures, and extended service life in precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision, high-speed angular contact ball bearings. |
| 1930 | Specifies the bearing dimensions: 150mm bore, 210mm outside diameter, 28mm width. |
| ACD | Signifies a 25° contact angle and that the bearing is supplied with a specific preload. |
| HC | Denotes the use of hybrid ceramic balls (Silicon Nitride). |
| P4 | Identifies the tolerance class P4 (ABEC-7), denoting very high precision. |
| A | Indicates a specific internal design and preload grade. |
S71930 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Running Accuracy: The preload applied to the bearing eliminates internal clearance, resulting in significantly increased stiffness and precise shaft positioning, which is critical for applications like machine tool spindles.
- Superior High-Speed Performance: The combination of ceramic balls (lighter and harder than steel) and a phenolic resin cage allows for lower centrifugal forces, reduced friction, and higher limiting speeds (up to 6,700 rpm). This design also manages heat generation effectively.
- Excellent Load Capacity: With a 25° contact angle, this bearing is optimally designed to handle combined loads, offering a high dynamic load rating of 24,300 lbf and a static load rating of 28,125 lbf.
- Sealed and Lubricated for Reliability: The sealed design protects against contamination and retains lubricant, ensuring consistent performance and a long, maintenance-free operational life within the specified temperature range.
S71930 ACD/HCP4A Bearing Typical Application Areas
This high-performance precision bearing is ideally suited for applications where speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: Motors for CNC machinery and PCB drilling.
- Medical Equipment: High-speed centrifuges and dental handpieces.
- Aerospace and Defense: Gyroscopes, radar systems, and navigation instruments.
