71917 CE/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71917 CE/P4ADGA
Basic Information
System of measurement
Metric
Weight
1 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
36 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
10980 lbf
Radial static load rating
10238 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Lubricated
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
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 570.47
/ each
In Stock
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71917 CE/P4ADGA Bearing Product Overview & Core Advantages
The 71917 CE/P4ADGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing is characterized by its ability to support combined loads (simultaneous radial and axial loads) with high rigidity. Its universal matchable (SU) design allows for flexible mounting in pairs to accommodate axial loads in both directions. The bearing features a phenolic cage, contributing to its high limiting speed of 17,000 rpm, and comes pre-lubricated for immediate use, making it an ideal choice for high-reliability, precision machinery.
71917 CE/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71917 CE/P4ADGA provides detailed technical specifications through its suffixes:
- 71917: Basic model number denoting a super-precision, 85mm bore angular contact bearing.
- C: Represents a 15° contact angle, optimized for high-speed applications with moderate axial load capacity.
- E: Indicates an optimized internal design, typically featuring a larger ball complement and reinforced raceways for increased load capacity.
- P4A: Denotes an extremely high tolerance class with strict limits on dimensional and running accuracy, surpassing ABEC 7/ISO P4 standards.
- DGA: Signifies the bearing is part of a Universal Matchable (SU) pair. When two such bearings are mounted in a face-to-face or back-to-back arrangement, they form a pre-configured set with a specific preload (Extra light / Class A).
71917 CE/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance class with a 15° contact angle, this bearing provides exceptional running accuracy and stiffness, which is critical for minimizing deflection in high-precision spindles.
- Superior Load Capacity: The optimized internal design (E-suffix) incorporates a larger number of balls (23 balls) and larger ball diameter (11.112 mm), resulting in high dynamic and static load ratings (10,980 lbf and 10,238 lbf, respectively) for its compact bearing dimensions (85mm x 120mm x 36mm).
- High-Speed Capability: The lightweight phenolic resin cage ensures stable operation and low friction at the high limiting speed of 17,000 rpm. The open design facilitates efficient lubrication and cooling.
- Universal Matching (SU): The DGA suffix confirms the bearing is universally matchable. This allows for simplified procurement and assembly of preloaded bearing pairs, ensuring optimal performance and simplified installation.
- Material Integrity: Constructed from high-grade chrome steel for both rings and balls, ensuring long service life and consistent performance under the specified temperature range of -30°C to 110°C.
71917 CE/P4ADGA Bearing Typical Application Areas
This super-precision angular contact ball bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for electric motors requiring high rotational accuracy.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
