71917 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71917 ACEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.42 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
85 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
120 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
6322 lbf
Radial static load rating
4860 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
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
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71917 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The 71917 ACEGA/HCP4A is a single-row angular contact ball bearing designed for ultra-high precision applications. Positioned in the premium P4A tolerance class, it delivers exceptional rotational accuracy and dimensional stability. A key advantage is its universal matchable (SU) design, allowing two bearings to be mounted in a tandem, back-to-back, or face-to-face arrangement to optimize performance for specific load and rigidity requirements. Its construction with ceramic balls and a phenolic cage enables superior high-speed performance and reduced operational friction.
71917 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACEGA | Contact angle of 25° and Extra Light (A) preload. | Optimized for high-speed operation with minimal friction and heat generation. |
| HCP4A | P4A tolerance class and Universal Matchable (SU) designation. | Guarantees extreme dimensional and running accuracy, enabling precise bearing arrangements. |
71917 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of ceramic (Si3N4) balls and a lightweight phenolic resin cage significantly reduces centrifugal forces, allowing for a high limiting speed of 28,000 rpm. This also provides inherent electrical insulation.
- Ultra-Precision: Manufactured to ABEC 7 / P4A tolerance standards, this bearing ensures minimal runout and vibration, which is critical for maintaining accuracy in precision spindles.
- Universal Matching: The SU designation means bearings are selectively graded to be universally interchangeable in sets, simplifying the creation of preloaded duplex pairs for enhanced stiffness and load capacity.
- High Rigidity & Load Capacity: The 25° contact angle provides an excellent balance, offering robust support for combined radial and axial loads.
71917 ACEGA/HCP4A Bearing Typical Application Areas
This high-precision, high-speed bearing is engineered for demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM machinery.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other instrumentation requiring utmost accuracy.
