S7004 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S7004 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.06 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.006mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
12
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1872 lbf
Radial static load rating
934 lbf
Limiting speed
45 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:
$ 119.05
/ each
In Stock
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S7004 ACD/HCP4A Bearing Product Overview & Core Advantages
The S7004 ACD/HCP4A is a high-precision, single-row angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and high-speed performance. Its design enables it to support combined radial and axial loads simultaneously. A key feature is its ceramic ball construction, which significantly reduces centrifugal forces and heat generation, contributing to superior high-speed capabilities and extended service life. This bearing is preloaded and comes with a seal and factory-applied lubrication, making it a ready-to-install, high-reliability component for critical machinery.
S7004 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S7004 ACD/HCP4A can be broken down as follows:
- S7004: Denotes the bearing series and size (20mm bore, 42mm OD, 12mm width).
- A: Indicates a 25° contact angle, optimized for supporting higher axial loads.
- C: Signifies the use of Ceramic (Si3N4) balls.
- D: Indicates that the bearing is supplied with a Preload.
- HC: Stands for a Phenolic (Resin) Cage.
- P4: Specifies the P4 (ABEC-7) tolerance class, ensuring ultra-high running accuracy.
- A: Confirms the 25° contact angle (often repeated for clarity in the code).
S7004 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Performance & Reduced Friction: The combination of lightweight ceramic balls and a phenolic cage minimizes inertial forces and allows for a limiting speed of 45,000 rpm. This results in lower operating temperatures and reduced energy consumption.
- High Rigidity and Load Capacity: The 25° contact angle and preload provide high system rigidity, enabling precise shaft positioning and excellent resistance to both radial and axial combined loads.
- Ultra-Precision Operation: Manufactured to a P4 (ABEC-7) tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications requiring extreme rotational accuracy.
- Sealed and Lubricated for Longevity: The integrated seal protects against contamination, and the factory-applied lubrication ensures immediate and reliable operation, reducing maintenance needs.
S7004 ACD/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Speed CNC Machining Centers
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Aerospace and Defense Instrumentation
