637
600 Series Miniature Bearings
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Part No.
Part No.
637
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
24.2 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
7 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
26 mm
Outside diameter tolerance
-0.008mm to 0
Width
9 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
873 lbf
Radial static load rating
357 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Required
Radial internal clearance
MC3
Radial internal clearance
0.002mm to 0.013mm
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:
$ 1.13
/ each
In Stock
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637 Bearing Product Overview & Core Advantages
The 637 metric ball bearing is a high-performance single row deep groove ball bearing engineered for reliable operation in a wide range of industrial applications. Designed primarily to accommodate radial loads, its precision construction ensures smooth rotation and long service life. Manufactured to ABEC1 tolerance class with optimized internal geometry, this bearing offers an excellent balance of performance, durability, and cost-effectiveness for general machinery and equipment requiring dependable rotational support.
637 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Interpretation | Technical Significance |
|---|---|---|
| 637 | Basic Bearing Number | Defines the standard bearing dimensions: 7mm bore, 26mm OD, 9mm width. |
| No Suffix | Open (Unsealed) | No integral seals or shields. Requires external sealing in contaminated environments. Allows for versatile re-lubrication options. |
| (Implied) | Standard Cage & Clearance | Features a durable stainless steel cage and standard MC3 radial internal clearance (0.002mm to 0.013mm). |
637 Bearing Structural Features & Performance Benefits
- Optimized Load Capacity: The deep groove raceway and complement of seven precision balls enable high radial dynamic load rating (873 lbf) and static load rating (357 lbf) for its compact size.
- High-Speed Capability: The lightweight, corrosion-resistant stainless steel cage and precision-ground components contribute to a high limiting speed of 28,000 rpm, making it suitable for high-speed applications.
- Precision Operation: Manufactured to ABEC1 precision standards with tight dimensional tolerances, ensuring smooth, quiet, and low-vibration running, which is critical for precision machinery.
- Robust Material Construction: Both rings and balls are made from high-carbon chrome steel, providing excellent hardness, wear resistance, and fatigue life.
- Versatile Operating Range: With a specified temperature range from -30°C to 110°C, this bearing is suitable for use in various environmental conditions.
637 Bearing Typical Application Areas
- Small Electric Motors and Gear Motors
- Precision Spindles in Dental and Medical Handpieces
- Office Automation Equipment (e.g., Printers, Scanners)
- Light-duty Fans and Blowers
- Textile Machinery
- Instrumentation and Measurement Devices
