71934 ACD/P4ATBTG320
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71934 ACD/P4ATBTG320
Basic Information
System of measurement
Metric
Weight
8.55 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
170 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
230 mm
Outside diameter tolerance
-0.004mm to 0
Width
84 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
19.05 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
59625 lbf
Radial static load rating
108000 lbf
Limiting speed
16.25 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
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.
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71934 ACD/P4ATBTG320 Bearing Product Overview & Core Advantages
The 71934 ACD/P4ATBTG320 is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched arrangement bearing set features a Triplex Back-to-Back (TBT) configuration, providing superior stability and the ability to withstand combined radial and axial loads. Manufactured to a P4A tolerance class, it ensures high running accuracy and is preloaded for immediate, precise operation. Its robust construction and phenolic cage make it suitable for high-performance systems.
71934 ACD/P4ATBTG320 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71934 | Basic bearing designation indicating size series and 170 mm bore diameter. |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | High precision tolerance class for superior running accuracy. |
| TBT | Triplex Back-to-Back matched set arrangement (3 bearings). |
| G320 | Indicates the bearing is lubricated from the manufacturer. |
71934 ACD/P4ATBTG320 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The Triplex Back-to-Back (TBT) arrangement of three bearings creates an extremely rigid system capable of handling significant combined radial and axial loads (Dynamic: 59,625 lbf, Static: 108,000 lbf).
- Precision Performance: Manufactured to P4A tolerance class with a 25° contact angle, this bearing ensures high running accuracy and precise shaft positioning, which is critical for applications with minimal runout tolerance.
- Optimized for High-Speed Operation: The lightweight and robust phenolic cage maintains ball alignment and stability, contributing to a high limiting speed of 16,250 rpm.
- Preload & Readiness: The set is supplied preloaded, eliminating the need for initial adjustment and ensuring immediate high-stiffness performance upon installation.
- Durability: Components made from chrome steel offer high hardness and wear resistance, ensuring a long operational life under demanding conditions.
71934 ACD/P4ATBTG320 Bearing Typical Application Areas
This bearing is engineered for high-precision, high-stiffness applications, including:
- Machine Tool Spindles: For milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- High-Speed Machining Centers: Where preloaded bearing sets are essential for dynamic stability.
- Precision Grinding Spindles: Demanding applications with high rotational speeds and minimal deflection.
- Industrial Pumps and Compressors: For handling significant axial and radial loads in a compact envelope.
