629
600 Series Miniature Bearings
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Part No.
Part No.
629
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
19 g
Tolerance class
ABEC1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
9 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
26 mm
Outside diameter tolerance
-0.008mm to 0
Width
8 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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629 Bearing Product Overview & Core Advantages
The 629 is a high-performance single row deep groove ball bearing designed for reliable operation in demanding applications. Engineered with precision ABEC1 tolerances and manufactured from high-grade chrome steel, this bearing delivers exceptional rotational accuracy and durability. Its fundamental design excels at carrying significant radial loads, making it an ideal, compact solution for a wide array of machinery. The open design ensures versatility for various lubrication systems, while the stainless steel cage provides robust guidance for the balls, contributing to stable high-speed performance up to 28,000 rpm.
629 Bearing Model Code Explained, Specifications & Naming Convention
| Prefix/Suffix | Interpretation | Technical Significance |
|---|---|---|
| 629 | Basic Model Number | Denotes a standard, metric single row deep groove ball bearing with a 9mm bore, 26mm OD, and 8mm width. |
| Open (Implied) | Seal Type | No seals or shields, allowing for high-speed operation and custom lubrication schemes. Requires external sealing in contaminated environments. |
| ABEC1 | Tolerance Class | Specifies standard precision levels for runout and dimensional accuracy, suitable for most industrial applications. |
| C3 (MC3) | Radial Internal Clearance | Greater than normal clearance (0.002mm to 0.013mm), designed to accommodate thermal expansion in applications with high operating temperatures or where fits cause clearance reduction. |
629 Bearing Structural Features & Performance Benefits
- Optimized Deep Groove Raceway: The deep, continuous raceways on both rings are precision-ground to facilitate smooth rotation and efficient support for high radial load capacity.
- Stainless Steel Cage: The use of a stamped stainless steel cage ensures excellent corrosion resistance within the bearing, reduces friction, and maintains ball alignment for stable operation at the limiting speed.
- Superior Material Construction: Both rings and balls are made from high-carbon chrome steel (AISI 52100 equivalent), providing high hardness, wear resistance, and a long operational lifespan.
- Versatile Lubrication: The open bearing design allows for the use of grease or oil, enabling optimal performance tailoring for specific speed, temperature, and life requirements.
- MC3 Internal Clearance: The C3 clearance provides operational reliability in applications where thermal expansion is a factor, preventing preload and potential seizure.
629 Bearing Typical Application Areas
- Electric Motors and Small Gearboxes
- Industrial Fans and Blowers
- Power Tools and Handheld Appliances
- Conveyor System Idler Rolls
- Agricultural Machinery
- Automotive Auxiliary Units (e.g., alternators, water pumps)
