633
600 Series Miniature Bearings
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Part No.
Part No.
633
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
3.27 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
3 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
13 mm
Outside diameter tolerance
-0.008mm to 0
Width
5 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
2.381 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
249 lbf
Radial static load rating
88 lbf
Limiting speed
40 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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633 Bearing Product Overview & Core Advantages
The 633 metric ball bearing is a fundamental single row deep groove ball bearing designed for reliable performance in a wide range of applications. Engineered to primarily support radial loads, this open-type bearing offers a compact and versatile solution. Manufactured to ABEC1 precision tolerances, it provides a cost-effective balance of performance and value, making it an excellent choice for general industrial use where high speeds are not the primary requirement.
633 Bearing Model Code Explained, Specifications & Naming Convention
| Code | Interpretation | Technical Significance |
|---|---|---|
| 633 | Basic Model Number | Denotes a metric, single row deep groove ball bearing with a 3mm bore, 13mm OD, and 5mm width. |
| Open | Seal Type | No seals or shields, allowing for higher potential speeds and easy relubrication. Requires a clean operating environment or external sealing. |
| MC3 | Radial Internal Clearance | Specifies a greater than normal clearance (0.002mm to 0.013mm), suitable for applications with thermal expansion concerns or where interference fits are used. |
| ABEC1 | Tolerance Class | Defines standard precision levels for bore, outer diameter, and width tolerances, ensuring reliable and consistent performance for general applications. |
633 Bearing Structural Features & Performance Benefits
- Robust Material Construction: Features rings and balls made from Chrome Steel for high load capacity and durability, combined with a Stainless Steel cage for excellent corrosion resistance and cage integrity.
- Optimized Internal Geometry: The deep groove raceway and complement of seven precision balls enable efficient handling of radial dynamic and static loads (249 lbf and 88 lbf respectively).
- Standard Internal Clearance: The MC3 clearance group provides operational flexibility in environments with temperature fluctuations, helping to prevent preload and binding.
- Compliant Design: The bearing is ROHS and REACH compliant, meeting stringent international standards for material use and environmental safety.
633 Bearing Typical Application Areas
- Small Electric Motors and Gearboxes
- Precision Instruments and Optical Devices
- Office Automation Equipment (printers, scanners)
- Low-Power Fans and Blowers
- Medical Devices and Laboratory Equipment
- Radio Control Models and Hobbyist Projects
