71934 ACD/P4ATBTB
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71934 ACD/P4ATBTB
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
Light / Class B
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
71934 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 71934 ACD/P4ATBTB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This triplex back-to-back (TBT) matched set consists of three individual bearings, enabling it to handle significant combined loads (radial and axial) simultaneously. Manufactured to a P4A tolerance class, it offers superior running accuracy and dimensional stability. Its light preload (Class B) minimizes deflection under operational stresses, making it ideal for high-speed, high-rigidity spindle systems where precision is paramount.
Model Code Breakdown
The model number 71934 ACD/P4ATBTB provides detailed technical specifications:
- 71934: Basic bearing series and size designation (170mm bore, 230mm OD)
- A: 25° contact angle, optimized for carrying high axial loads
- CD: Polyamide (Phenolic) cage, suitable for high-speed operation
- P4A: High precision tolerance class exceeding ABEC 7/ISO P4 standards
- TBT: Triplex Back-to-Back arrangement of three matched bearings
71934 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity & Load Capacity: The triplex back-to-back configuration creates an extremely rigid bearing system capable of withstanding heavy combined radial and axial loads. With a dynamic load rating of 59,625 lbf and static load rating of 108,000 lbf, it delivers reliable performance under demanding conditions.
- High-Speed Capability: The lightweight phenolic cage (CD) and optimized internal geometry contribute to a high limiting speed of 16,250 rpm, making it suitable for high-speed machining applications.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for superior machining accuracy.
- Premium Material Construction: Both rings and balls are made from chrome steel, providing excellent wear resistance and durability for long service life.
71934 ACD/P4ATBTB Bearing Typical Application Areas
This precision bearing set is specifically engineered for high-performance applications including:
- Machine Tool Spindles for CNC machining centers, grinders, and milling machines
- High-Speed Precision Spindles in aerospace and automotive manufacturing
- Industrial Pumps and Compressors requiring high rigidity and accuracy
- Precision Instrumentation and specialized rotary equipment
