61872 MA
618 & 619 Series Thin Section Bearings
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Part No.
Part No.
61872 MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
12 kg
Tolerance class
P6
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
360 mm
Bore diameter tolerance
-0.03mm to 0
Outside diameter
440 mm
Outside diameter tolerance
-0.033mm to 0
Width
38 mm
Width tolerance
-0.4mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
40915 lbf
Radial static load rating
64071 lbf
Limiting speed
2.2 X 1000 rpm
Lubrication
None
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1660.49
/ each
In Stock
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61872 MA Bearing Product Overview & Core Advantages
The 61872 MA is a single row deep groove ball bearing engineered for high-performance applications demanding precision and reliability. Characterized by its open design and P6 tolerance class, this bearing is optimized for handling significant radial loads. Its robust construction from high-grade chrome steel ensures exceptional durability and a long operational life. The absence of seals or shields allows for higher operational speeds and makes it suitable for applications where external lubrication systems are used, offering flexibility in demanding industrial environments.
61872 MA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 61872 | Basic bearing designation, defining the standard bearing dimensions (360mm bore, 440mm OD, 38mm width). |
| M | Indicates the use of a machined brass cage (based on standard bearing nomenclature), which provides high strength and is suitable for high-speed applications. |
| A | Internal design modification, typically signifying optimized internal geometry for enhanced load capacity and performance. |
61872 MA Bearing Structural Features & Performance Benefits
- High Load Capacity: The single row deep groove construction and high-grade chrome steel components enable it to support substantial radial dynamic load ratings of 40915 lbf and radial static load ratings of 64071 lbf, ensuring reliable performance under heavy loads.
- Precision & High-Speed Capability: Manufactured to a P6 tolerance class, this bearing offers superior running accuracy. Combined with a stainless steel cage and open design, it achieves a limiting speed of 2,200 rpm, making it a capable high-speed bearing.
- Robust Construction: The use of a machined brass cage (M) ensures excellent dimensional stability and guidance of the balls, contributing to smooth operation and extended service life even in demanding conditions.
- Standard Internal Clearance: The CN radial internal clearance is the standard for normal operating conditions, providing a balance between temperature management and running precision.
61872 MA Bearing Typical Application Areas
This precision bearing is ideally suited for heavy-duty machinery and precision equipment where high radial load capacity and speed are critical. Common applications include:
- Industrial Gearboxes and large power transmission systems
- Vibrating Screens and other mining equipment
- Heavy-duty Electric Motors
- Large Pumps and Compressors
- Main spindles in large Machine Tools
