S71907 ACE/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71907 ACE/P4ADBB
Basic Information
System of measurement
Metric
Weight
0.15 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
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
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:
$ 324.34
/ each
In Stock
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S71907 ACE/P4ADBB Bearing Product Overview & Core Advantages
The S71907 ACE/P4ADBB is a precision angular contact ball bearing configured as a matched duplex pair in a back-to-back (DB) arrangement. Engineered for high-precision and high-rigidity applications, this bearing is designed to handle combined loads—simultaneously supporting significant radial loads and axial loads in both directions. Its P4A tolerance class ensures exceptional dimensional and running accuracy, making it ideal for demanding, high-speed machinery where precision and reliability are paramount.
S71907 ACE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACE | Optimized internal design for enhanced performance and lower operating torque. |
| P4A | Denotes a super-precision tolerance class with even tighter controls on runout and dimensional stability than standard P4. |
| DBB | Indicates the bearing is supplied as a Duplex Back-to-Back (DB) matched set. This arrangement provides high moment rigidity. |
S71907 ACE/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists overturning moments, making it exceptionally stable under complex loading conditions.
- Superior Load Capacity: With a 25° contact angle and a matched set of two bearings, this configuration is engineered to handle high combined radial and axial loads from both directions simultaneously.
- Precision High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to smooth operation at the high limiting speed of 56,000 rpm. The P4A precision ensures minimal vibration and heat generation.
- Sealed & Pre-Lubricated: As a sealed bearing pre-filled with grease lubrication, it is protected from contamination and is ready for immediate installation, offering long-term, maintenance-free operation within its specified temperature range.
S71907 ACE/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for applications requiring extreme accuracy and rigidity, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Gearboxes
- High-Frequency Spindles
- Medical and Dental Equipment
- Optical and Measuring Instrumentation
