S71907 ACE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71907 ACE/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
55 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2678 lbf
Radial static load rating
1980 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Grease
Matched arrangement
Universal Matchable (SU)
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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S71907 ACE/HCP4ADGA Bearing Product Overview & Core Advantages
The S71907 ACE/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This matched bearing set features a universal matchable (SU) design, allowing for flexible mounting configurations to handle combined loads—simultaneous radial and bidirectional axial forces. Its compact design, combined with ceramic balls and a P4A super-precision tolerance, makes it ideal for high-speed spindles and other precision machinery where high rigidity and minimal runout are critical.
S71907 ACE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACE | 25° contact angle, Extra light preload (Class A) |
| HC | Hybrid Ceramic balls (Silicon Nitride) |
| P4A | Super precision tolerance class (equivalent to ABEC 7) |
| DGA | Sealed on both sides, grease lubricated |
S71907 ACE/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design provides superior stiffness and can handle significant combined radial and axial loads in both directions, making it suitable for applications with complex loading conditions.
- Enhanced High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage enables a high limiting speed of 56,000 rpm, minimizing friction and heat generation.
- Precision & Longevity: Manufactured to P4A tolerance class, this bearing ensures minimal vibration and precise rotational accuracy. The integral seals and pre-applied grease provide effective contamination protection and long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S71907 ACE/HCP4ADGA Bearing Typical Application Areas
This precision bearing is engineered for high-performance applications, including:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- Dental and Medical Handpieces
- Advanced Robotics and Automation
