71815 ACD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71815 ACD/P4DBA
Basic Information
System of measurement
Metric
Weight
0.28 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
95 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
33
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4860 lbf
Radial static load rating
7200 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
In Stock
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71815 ACD/P4DBA Bearing Product Overview & Core Advantages
The 71815 ACD/P4DBA is a metric precision angular contact ball bearing configured as a duplex back-to-back (DB) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing is preloaded to Extra Light (Class A) specifications. Its design is optimized to handle combined radial and axial loads simultaneously, making it an ideal solution for high-precision spindles and machinery requiring superior running accuracy and high rigidity.
71815 ACD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71815 ACD/P4DBA is decoded as follows:
- 71815: Basic bearing series, indicating a 75mm bore, 95mm OD, and 20mm width.
- AC: Angular Contact design with a 25° contact angle.
- D: Signifies a Duplex (two-bearing) configuration.
- DB: Specifies the Back-to-Back mounting arrangement.
- P4: Denotes a P4 tolerance class, indicating very high dimensional and running accuracy.
- Open Seal Type: The bearing is supplied without seals or shields for high-speed applications.
- Lubricated: The bearing is pre-lubricated from the factory.
71815 ACD/P4DBA Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The duplex back-to-back (DB) arrangement provides a rigid, moment-resisting bearing system, significantly enhancing machine tool stiffness and positioning accuracy. The P4 tolerance class ensures minimal runout and vibration.
- Optimized Load Capacity: The 25° contact angle is engineered for excellent performance under combined loads, effectively supporting substantial radial loads and thrust loads in both directions.
- High-Speed Capability: The open design and lightweight phenolic cage minimize friction and centrifugal forces, enabling a high limiting speed of 28,000 rpm. This makes it suitable for demanding high-speed applications.
- Durability & Reliability: Manufactured from high-grade chrome steel for both rings and balls, the bearing offers excellent fatigue life and wear resistance, ensuring long-term operational reliability.
71815 ACD/P4DBA Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors
- Medical Equipment: Dental handpieces and surgical tools.
- Aerospace Instrumentation
