7040 BGM
Single Row Angular Contact Ball Bearings
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Part No.
Part No.
7040 BGM
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
18 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
200 mm
Bore diameter tolerance
-0.022mm to 0
Outside diameter
310 mm
Outside diameter tolerance
-0.025mm to 0
Width
51 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
2.1 mm
Contact angle
40 °
Distance from side face to load point
145 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
243.6 mm
Inner ring small-side shoulder diameter
224 mm
Outer Ring Dimensions
Shoulder diameter outer ring
269.8 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
50625 lbf
Radial static load rating
65250 lbf
Limiting speed
2.2 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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7040 BGM Bearing Product Overview & Core Advantages
The 7040 is a single row angular contact ball bearing engineered for applications requiring high precision and the ability to handle significant combined loads. Designed with a 40° contact angle, it excels at supporting substantial axial loads in one direction while simultaneously carrying radial loads. Its P6 (ABEC-3) tolerance class ensures high running accuracy, making it ideal for demanding, high-reliability machinery where precise shaft positioning is critical. The open design allows for versatile lubrication options to optimize performance for specific operating conditions.
7040 BGM Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7040 | Basic bearing designation, defining the core bearing dimensions (200mm bore, 310mm OD, 51mm width). |
| Open | No integral seals or shields. This allows for higher limiting speeds and custom lubrication schemes but requires a clean operating environment or external sealing. |
| P6 (ABEC-3) | Specifies the precision tolerance class, ensuring tight dimensional and running accuracy for smooth, low-vibration operation. |
| 40° | Indicates the contact angle, which determines the bearing's optimized capacity for axial loads. |
7040 BGM Bearing Structural Features & Performance Benefits
- Optimized Internal Geometry: The 40° contact angle and precisely calculated shoulder diameters (269.8 mm outer ring, 243.6 mm inner ring) are engineered to provide excellent axial load capacity and system rigidity.
- High-Performance Materials: Constructed from chrome steel for rings and balls, and a brass cage, this combination ensures high durability, wear resistance, and reliable operation under high stress and speed.
- Superior Load Ratings: With a dynamic load rating of 50,625 lbf and a static load rating of 65,250 lbf, the 7040 is built to withstand demanding combined loads over a long service life.
- High-Speed Capability: The robust brass cage and open design contribute to a high limiting speed of 2,200 rpm, making it suitable for high-speed applications.
7040 BGM Bearing Typical Application Areas
This angular contact ball bearing is ideally suited for precision machinery and heavy-duty equipment, including:
- Machine Tool Spindles
- Industrial Pumps and Compressors
- Gearboxes and Power Transmission Systems
- Precision Agricultural and Construction Equipment
