71900 ACD/P4ATBTC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71900 ACD/P4ATBTC
Basic Information
System of measurement
Metric
Weight
0.027 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
10 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
22 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
3.175 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1170 lbf
Radial static load rating
720 lbf
Limiting speed
165 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
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.
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71900 ACD/P4ATBTC Bearing Product Overview & Core Advantages
The 71900 ACD/P4ATBTC is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This triplex back-to-back (TBT) matched set delivers superior performance in handling combined loads, offering high axial and radial load capacity simultaneously. Manufactured to P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed, high-rigidity spindles and precision machinery where operational reliability is critical.
71900 ACD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
The model number 71900 ACD/P4ATBTC provides detailed technical specifications:
- 71900: Basic series designation for a small-bore, high-precision angular contact bearing.
- ACD: Signifies a 25° contact angle and specific internal design optimized for high rigidity.
- P4A: Denotes an ultra-precision tolerance class exceeding ABEC 7, ensuring extremely tight dimensional and running accuracy.
- TBT: Indicates the bearing is supplied as a Triplex Back-to-Back matched set of three bearings, providing maximum rigidity and moment load capacity.
- C: Specifies a Moderate preload (Class C) applied to the set, eliminating internal clearance for enhanced stiffness and precise shaft positioning.
71900 ACD/P4ATBTC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The triplex back-to-back arrangement creates a highly rigid bearing system capable of supporting significant combined radial and axial loads, as well as moment loads. The 25° contact angle is optimized for high axial load support.
- Precision & High-Speed Performance: Built to P4A tolerance standards with a phenolic resin cage, this bearing achieves smooth operation and a high limiting speed of 165,000 rpm. The precision-ground components minimize friction and heat generation.
- Superior Material Construction: Manufactured from chrome steel for both rings and balls, the bearing ensures high durability, wear resistance, and long service life under demanding conditions.
- Pre-lubricated for Immediate Use: The bearing comes lubricated from the factory, ready for installation and immediate operation within its specified temperature range.
71900 ACD/P4ATBTC Bearing Typical Application Areas
This precision bearing set is engineered for high-performance applications, including:
- High-Frequency Spindles for PCB drilling and precision machining
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Performance Dental Handpieces
- Advanced Robotics and Automation components requiring high rigidity and accuracy
