634 2rs
600 Series Miniature Bearings
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Part No.
Part No.
634 2rs
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
5.44 g
Tolerance class
ABEC1
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
4 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
16 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
256 lbf
Radial static load rating
94 lbf
Limiting speed
36 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
Shield material
Nitrile Rubber
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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634 2rs Bearing Product Overview & Core Advantages
The 634 2RS is a metric single row deep groove ball bearing designed for exceptional reliability in compact applications. Featuring integrated Nitrile rubber seals (2RS) on both sides, this bearing provides superior protection against contamination while retaining lubrication. Its optimized deep groove raceway enables smooth operation under radial loads and moderate axial loads in both directions. Manufactured to ABEC1 precision standards with chrome steel components, it delivers consistent performance for industrial applications requiring compact dimensions (4mm bore × 16mm OD × 5mm width) and maintenance-free operation.
Model Code Technical Breakdown
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| 63 | Deep Groove Ball Bearing Series | Standard dimensions and radial load optimization |
| 4 | Bore Diameter Code (4mm) | Compact shaft compatibility |
| 2RS | Double Rubber Seals (Both Sides) | Complete contamination protection and lubricant retention |
634 2rs Bearing Structural Features & Performance Benefits
- Optimized Deep Groove Design: The raceway geometry enables efficient handling of radial loads (256 lbf dynamic rating) while accommodating moderate bidirectional axial loads
- Double Rubber Sealing System: Nitrile rubber (NBR) contact seals provide superior exclusion of contaminants and secure lubricant retention, enabling maintenance-free operation
- Precision Engineering: ABEC1 tolerance class ensures consistent running accuracy, while MC3 radial clearance (0.002-0.013mm) provides optimal internal fit for various operating conditions
- Advanced Material Selection: Chrome steel rings and balls combined with stainless steel cage deliver excellent wear resistance and corrosion protection
- High-Speed Capability: The precision-ground components and optimized cage design support operation up to 36,000 rpm limiting speed
634 2rs Bearing Typical Application Areas
- Small Electric Motors: Main shaft support in compact DC motors and miniature AC motors
- Precision Instruments: Measurement devices, optical equipment, and laboratory instruments
- Office Automation: Printer rollers, scanner mechanisms, and copier components
- Medical Devices: Small pump systems, dental handpieces, and diagnostic equipment
- Consumer Electronics: Cooling fans, small power tools, and household appliances
