70/1250 AMB
Single Row Angular Contact Ball Bearings
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Part No.
Part No.
70/1250 AMB
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
1600 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
1250 mm
Bore diameter tolerance
-0.075mm to 0
Outside diameter
1750 mm
Outside diameter tolerance
-0.115mm to 0
Width
218 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
9.5 mm
Contact angle
40 °
Distance from side face to load point
542 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
1430.5 mm
Inner ring small-side shoulder diameter
1430.5 mm
Outer Ring Dimensions
Shoulder diameter outer ring
1569 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
447750 lbf
Radial static load rating
1721250 lbf
Limiting speed
0.24 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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70/1250 AMB Bearing Product Overview & Core Advantages
The 70/1250 AMB is a single row angular contact ball bearing engineered for applications requiring exceptional precision and reliability. This precision bearing is designed to accommodate combined loads, primarily handling high thrust loads in one direction alongside significant radial loads. Its 40° contact angle is optimized for high axial rigidity, making it an ideal choice for heavy-duty machinery and high-precision spindles where high rigidity and operational stability are paramount. Manufactured to a P6 (ABEC-3) tolerance class, it guarantees consistent performance and long service life.
70/1250 AMB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 70/1250 | Bearing series and bore diameter (1250 mm). |
| AMB | Specific manufacturer designation for this angular contact bearing series and internal design. |
| Open (Seal Type) | No integral seals or shields, allowing for higher limiting speeds and customized lubrication systems. |
| P6 (Tolerance Class) | Dimensional and running accuracy equivalent to ABEC-3, ensuring high precision. |
70/1250 AMB Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The single row design with a steep 40° contact angle provides superior axial rigidity, enabling the bearing to withstand high thrust loads and significant radial loads simultaneously. The optimized shoulder diameters on both rings ensure secure seating and maximum load support.
- Precision Engineering: Manufactured to P6 tolerance with a brass cage, this bearing offers excellent running accuracy and stability, which is critical for minimizing vibration and maintaining precision in demanding applications.
- Material and Construction: Constructed from chrome steel for both rings and balls, the bearing provides high fatigue life and durability. The open design facilitates efficient lubrication management for optimal heat dissipation.
- Critical Dimensions: With a substantial load point distance of 542 mm, the bearing offers a large moment load capacity, contributing to overall system stability.
70/1250 AMB Bearing Typical Application Areas
This bearing is suited for heavy-duty and precision applications, including:
- Large Industrial Gearboxes
- Heavy-Duty Machine Tool Spindles
- Large-Diameter Precision Rotating Shafts
- Mining and Construction Machinery
- Large Pumps and Compressors
