S7008 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7008 ACEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.17 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.004mm to 0
Width
15 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2632 lbf
Radial static load rating
1620 lbf
Limiting speed
41 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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S7008 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The S7008 ACEGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional speed capability and rigidity. This sealed bearing features a single, universal-matching design with an extra light preload (Class A), making it ideal for high-speed spindles and precision machinery. Its ability to handle combined radial and axial loads simultaneously, combined with a P4A super-precision tolerance and ceramic balls, ensures outstanding operational accuracy, reliability, and long service life in compact installations.
S7008 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| EGA | Preloaded universal match set. "E" denotes a universal matching bearing, "GA" indicates a specific preload gap. |
| HC | Hybrid Ceramic construction, featuring ceramic balls and a steel ring. |
| P4A | Super precision tolerance class, exceeding ABEC 7/ISO P4 standards for enhanced running accuracy. |
S7008 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The single bearing design with extra light preload (Class A) provides precise shaft positioning and high system rigidity, minimizing deflection under load. The P4A tolerance ensures exceptional running accuracy.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly lowers friction and allows for a very high limiting speed of 41,000 rpm.
- Enhanced Durability & Temperature Resistance: Hybrid ceramic construction provides superior resistance to wear and operates effectively within a wide temperature range of -30°C to 110°C. The integral seals retain grease and protect against contamination.
- Universal Matching: Designed as a Universal Matchable (SU) bearing, it can be mounted in various preloaded arrangements (back-to-back, face-to-face) with another identical bearing without selective assembly, simplifying installation.
S7008 ACEGA/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Spindles in PCB drilling and routing equipment
- High-Frequency Motors and Servo Drives
- Turbochargers and other high-speed rotating assemblies
- Medical and Dental Handpieces
