71905 ACD/P4ADT
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71905 ACD/P4ADT
Basic Information
System of measurement
Metric
Weight
0.084 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2340 lbf
Radial static load rating
1721 lbf
Limiting speed
53 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
In Stock
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71905 ACD/P4ADT Bearing Product Overview & Core Advantages
The 71905 ACD/P4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex tandem (DT) arrangement consists of two matched bearings preloaded against each other, delivering superior axial stiffness and the ability to handle significant combined loads. Manufactured to P4A tolerance class, it ensures high running accuracy and is pre-lubricated for immediate use, making it ideal for high-speed, high-precision machinery where reliability is paramount.
71905 ACD/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACD | Angular Contact, Duplex Tandem arrangement | Optimized for high axial rigidity and unidirectional thrust capacity. |
| P4A | High Precision Tolerance Class (equivalent to ABEC 7) | Ensures minimal runout and vibration for superior performance in precision applications. |
71905 ACD/P4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem configuration and 25° contact angle create an exceptionally rigid bearing set capable of supporting heavy combined loads (radial and axial) in one direction.
- Precision Performance: The P4A tolerance class guarantees tight dimensional control on the bore diameter (25 mm) and outside diameter (42 mm), resulting in high running accuracy and system stability.
- High-Speed Capability: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 53,000 rpm. The standard lubrication further supports reliable high-speed operation.
- Durability & Reliability: Manufactured from chrome steel for both rings and balls, this bearing offers excellent wear resistance and a long operational life within its specified temperature range of -30°C to 110°C.
71905 ACD/P4ADT Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Spindles for PCB drilling and milling
- Precision Grinding Spindles
- High-Speed Automation Equipment
