S71905 ACE/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71905 ACE/P4A
Basic Information
System of measurement
Metric
Weight
0.042 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.006mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
16
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1141 lbf
Radial static load rating
596 lbf
Limiting speed
44 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 212.51
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71905 ACE/P4A Bearing Product Overview & Core Advantages
The S71905 ACE/P4A is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and high-speed performance. This P4 (ABEC-7) tolerance class bearing is designed to accommodate high combined loads, primarily thrust loads in one direction, while also supporting significant radial loads. Its compact design, featuring a 9 mm width, makes it ideal for space-constrained, high-reliability applications such as precision spindles. The bearing comes prelubricated and sealed for immediate installation and long-term, maintenance-free operation.
S71905 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Advantage |
|---|---|---|
| ACE | 25° Contact Angle, Phenolic Cage, High Precision | Optimized for high thrust capacity and high-speed operation. The phenolic cage contributes to lower friction and higher limiting speeds. |
| P4A | P4 (ABEC-7) Tolerance Class | Guarantees extremely tight dimensional and running accuracy, ensuring smooth operation, reduced vibration, and superior performance in precision applications. |
S71905 ACE/P4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a 25° contact angle and a lightweight phenolic cage allows for a high limiting speed of 44,000 rpm, minimizing centrifugal forces and operational friction.
- Superior Rigidity and Load Capacity: The angular contact design provides high rigidity, enabling the bearing to efficiently handle combined radial and axial loads. The chrome steel construction ensures high dynamic (1141 lbf) and static (596 lbf) load ratings.
- Sealed and Lubricated for Life: As a sealed and pre-lubricated unit, it is protected from contamination and is designed for maintenance-free operation within its specified temperature range (-30° to 110 °C).
- Precision Engineering: Manufactured to P4 tolerance with tight bore, outside diameter, and width tolerances, this bearing ensures precise shaft positioning and minimal runout.
S71905 ACE/P4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Rotary Systems
- High-Frequency Motors
- Medical and Dental Handpieces
- Optical and Measuring Instrumentation
