71972 BM
Single Row Angular Contact Ball Bearings
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Part No.
Part No.
71972 BM
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
28.5 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
360 mm
Bore diameter tolerance
-0.03mm to 0
Outside diameter
480 mm
Outside diameter tolerance
-0.033mm to 0
Width
56 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
3 mm
Contact angle
40 °
Distance from side face to load point
204 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
408 mm
Outer Ring Dimensions
Shoulder diameter outer ring
441.66 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
67950 lbf
Radial static load rating
123750 lbf
Limiting speed
1.5 X 1000 rpm
Lubrication
Lubricated
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Brass
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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71972 BM Bearing Product Overview & Core Advantages
The 71972 BM is a single row angular contact ball bearing engineered for high-precision applications requiring superior performance under combined loads. Its defining feature is the 40° contact angle, which provides exceptional axial load capacity in one direction while handling significant radial loads. Manufactured to a P6 (ABEC-3) tolerance class, this bearing ensures high running accuracy and reliability. The brass cage contributes to stable operation at moderate speeds, making it an ideal choice for demanding industrial machinery where precision and rigidity are paramount.
71972 BM Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| BM | Indicates a brass cage and a specific internal design optimized for a 40° contact angle. This combination ensures high strength, thermal stability, and reliable guidance of the balls. |
71972 BM Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The single row design with a 40° contact angle is optimized to support substantial combined radial and axial loads simultaneously. The calculated load points and robust construction provide a high degree of system stiffness.
- Precision Performance: Manufactured to P6 tolerance, this bearing guarantees minimal runout and consistent performance, which is critical for the accuracy of spindles and other precision mechanisms.
- Optimized Cage Design: The brass cage (BM) offers excellent durability and is suitable for a wide range of operating conditions, including applications with high acceleration or deceleration.
- Material Integrity: Constructed from chrome steel for both rings and balls, the bearing provides high fatigue life and wear resistance, operating effectively within a temperature range of -30°C to 110°C.
71972 BM Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles
- Precision Gearboxes
- High-Power Electric Motors
- Pumps and Compressors
- Industrial Robotics and Automation Equipment
