7001 CEGA/HCP4AGMM1
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7001 CEGA/HCP4AGMM1
Basic Information
System of measurement
Metric
Weight
0.019 kg
Tolerance class
P4A
Seal type
Open
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
15 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
718 lbf
Radial static load rating
302 lbf
Limiting speed
100 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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7001 CEGA/HCP4AGMM1 Bearing Product Overview & Core Advantages
The 7001 CEGA/HCP4AGMM1 is a high-precision single row angular contact ball bearing engineered for applications demanding exceptional accuracy and high-speed performance. Its defining feature is the use of ceramic balls and a phenolic resin cage, which significantly reduce friction, heat generation, and weight. This configuration, combined with a P4A super-precision tolerance and an extra light preload (Class A), ensures extremely smooth operation, minimal rotational vibration, and superior running accuracy, making it ideal for the most demanding high-speed spindles.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7001 | Basic bearing series and size designation (12mm bore, 28mm OD). |
| CE | Hybrid ceramic ball bearing (Ceramic balls, steel rings). |
| GA | Contact angle of 15°. |
| HCP4A | Super precision tolerance class (P4A) with a phenolic cage. |
| GMM1 | Grease lubrication with a specific grade and fill quantity. |
7001 CEGA/HCP4AGMM1 Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of steel rings and ceramic (Si3N4) balls provides superior performance. Benefits include reduced centrifugal forces, lower operating temperatures, electrical insulation, and extended service life, especially at high rotational speeds.
- Phenolic Resin Cage: This lightweight and robust cage material offers excellent dimensional stability and low friction, contributing to smooth operation and high limiting speed (100,000 rpm).
- Super-Precision P4A Tolerance: Tighter bearing dimensions and running accuracy tolerances ensure minimal runout and vibration, which is critical for achieving high surface finishes and positioning accuracy in precision machinery.
- Optimized for Universal Matching: Designed as a Universal Matchable (SU) bearing, two identical bearings can be paired in a back-to-back (DB) or face-to-face (DF) arrangement to support combined loads and moments with optimized preload.
7001 CEGA/HCP4AGMM1 Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- High-Speed Machine Tool Spindles (CNC milling, grinding, routing)
- Precision Spindles in PCB drilling and semiconductor manufacturing equipment
- High-frequency Electric Motor Spindles
- Turbochargers and other high-speed instrumentation
