S7001 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7001 ACEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.019 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
12 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
28 mm
Outside diameter tolerance
-0.004mm to 0
Width
8 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
691 lbf
Radial static load rating
286 lbf
Limiting speed
95 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S7001 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The S7001 ACEGA/HCP4A is a super-precision angular contact ball bearing designed for the most demanding high-speed applications. This single bearing features a 25° contact angle and an Extra Light (A) preload, delivering exceptional rotational accuracy, high rigidity, and smooth operation. Its construction with ceramic balls and a phenolic cage significantly reduces centrifugal forces, enabling superior high-speed performance up to 95,000 rpm. As a Universal Matchable (SU) bearing, it can be universally paired with other SU bearings for simplified mounting and optimal performance in preloaded arrangements.
S7001 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S7001 ACEGA/HCP4A is decoded as follows:
- S7001: Denotes the bearing series and size (12mm bore, 28mm OD, 8mm width).
- AC: Angular Contact design.
- E: High-Precision (P4 equivalent).
- GA: Extra Light Preload (Class A).
- HC: Hybrid Ceramic (Steel rings with Silicon Nitride ceramic balls).
- P4A: Tolerance class P4A, indicating extremely tight dimensional and running accuracy tolerances superior to ABEC 7.
S7001 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls provides outstanding benefits including reduced friction, lower operating temperature, extended service life, and the ability to run at higher speeds with less lubrication.
- High-Speed Phenolic Cage: The lightweight and robust phenolic resin cage ensures stability and guidance of the ceramic balls at ultra-high rotational speeds, contributing directly to the limiting speed of 95,000 rpm.
- Super-Precision P4A Tolerance: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications requiring the highest levels of precision and smoothness.
- Optimized Load Capacity: With a 25° contact angle, the bearing is engineered to handle significant combined loads (radial and axial) simultaneously, offering high rigidity and precise shaft positioning.
- Sealed & Grease-Lubricated: The sealed design with factory-applied grease provides long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S7001 ACEGA/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where speed, precision, and reliability are paramount. Key applications include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Motors and Drives
- Aerospace & Defense Instrumentation
- Semiconductor Manufacturing Equipment
