71918 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71918 ACE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.46 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
125 mm
Outside diameter tolerance
-0.009mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
24
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
6435 lbf
Radial static load rating
5130 lbf
Limiting speed
24 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:
$ 1090.44
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71918 ACE/HCP4A Bearing Product Overview & Core Advantages
The 71918 ACE/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior performance. Designed to accommodate primarily axial loads in one direction, combined with moderate radial loads, it features a 25° contact angle for optimal load distribution. Manufactured to P4 (ABEC-7) tolerance class, it ensures exceptional running accuracy and dimensional stability. The combination of a phenolic cage and ceramic balls contributes to its high-speed capability, low friction, and extended service life, making it a reliable choice for demanding, high-rotation applications.
71918 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACE | Indicates a 25° contact angle and optimized internal geometry for high-speed operation and high rigidity. |
| HC | Signifies the use of Hybrid Ceramic balls, offering reduced weight, lower friction, and enhanced durability. |
| P4 | Denotes the P4 tolerance class (equivalent to ABEC-7), ensuring ultra-precise dimensions and running accuracy. |
71918 ACE/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Performance & Low Friction: The phenolic resin cage offers excellent dimensional stability at high speeds and is lightweight, while the ceramic balls significantly reduce centrifugal forces and friction, enabling a high limiting speed of 24,000 rpm.
- High Rigidity & Precision: Manufactured to P4 precision class with tight dimensional tolerances, this bearing provides stable and accurate rotational performance, essential for high-precision machinery.
- Optimized Load Capacity: The 25° contact angle is engineered to efficiently handle high axial loads in one direction, making it suitable for applications with significant thrust requirements.
- Preload & Stiffness: The bearing is supplied with a preload, which increases system rigidity, reduces vibration, and improves rotational accuracy.
- Wide Temperature Range: The specified materials and lubrication allow for reliable operation within a temperature range of -30°C to 110°C.
71918 ACE/HCP4A Bearing Typical Application Areas
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Aerospace & Defense Actuators
- Semiconductor Manufacturing Equipment
