S7008 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7008 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.17 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.007mm to 0
Width
15 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
18
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
3578 lbf
Radial static load rating
2340 lbf
Limiting speed
22 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:
$ 257.51
/ each
In Stock
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S7008 ACD/HCP4A Bearing Product Overview & Core Advantages
The S7008 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional speed, rigidity, and accuracy. Its design is optimized to accommodate combined loads (radial and axial) simultaneously. Key advantages include its ceramic ball construction for reduced weight and enhanced high-speed capability, a P4 (ABEC-7) tolerance class for superior running accuracy, and a phenolic cage for reliable performance at high rotational speeds. This bearing is preloaded and pre-lubricated, making it a ready-to-install solution for high-performance systems.
S7008 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S7008 | Denotes the bearing series and size (40mm bore, 68mm OD, 15mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a high-precision, duplex arrangement (two bearings matched for preload). |
| HC | Hybrid Ceramic, signifying the use of ceramic balls for superior performance. |
| P4A | Specifies the P4 (ABEC-7) tolerance class and a specific preload level (A). |
S7008 ACD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls significantly reduces centrifugal forces and friction, enabling a higher limiting speed of 22,000 rpm. This also improves stiffness and reduces heat generation.
- High Rigidity & Preload: The bearing is supplied as a preloaded, matched set (Duplex), providing high system rigidity and precise axial and radial positioning, which is critical for minimizing deflection under load.
- Optimized for Combined Loads: The 25° contact angle is ideal for applications with significant axial loads in combination with radial loads, offering excellent load capacity.
- High-Speed Phenolic Cage: The phenolic cage offers low weight, high strength, and excellent performance at high speeds, contributing to the bearing's overall high-speed capability and smooth operation.
- Sealed & Lubricated: The bearing is sealed to protect against contamination and is pre-lubricated with a high-performance grease suitable for its specified temperature range (-30° to 110 °C), ensuring long service life.
S7008 ACD/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance machinery where speed, accuracy, and reliability are paramount. Key applications include:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Robotics and Automation Arms
- High-Frequency Spindles for PCB drilling and routing
- Medical Equipment (Dental handpieces, centrifuges)
- Aerospace Actuators and Instrumentation
