627
600 Series Miniature Bearings
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Part No.
Part No.
627
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
12.7 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
22 mm
Outside diameter tolerance
-0.008mm to 0
Width
7 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
7
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
629 lbf
Radial static load rating
248 lbf
Limiting speed
30 X 1000 rpm
Lubrication
Required
Radial internal clearance
0.002mm to 0.013mm
Radial internal clearance
MC3
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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627 Bearing Product Overview & Core Advantages
The 627 metric ball bearing is a high-performance single row deep groove ball bearing designed for reliable operation in a wide range of industrial applications. Engineered from chrome steel with a stainless steel cage, it offers an excellent balance of durability, precision, and cost-effectiveness. Its open design allows for versatile lubrication options, making it suitable for environments where specific lubricants are required. With a radial dynamic load rating of 629 lbf and a compact 7mm bore, this bearing is an ideal solution for applications demanding high rotational accuracy and robust radial load capacity.
627 Bearing Model Code Explained, Specifications & Naming Convention
| Code | Interpretation | Technical Significance |
|---|---|---|
| 627 | Basic Model Number | Denotes a metric, single row deep groove ball bearing with a 7mm bore, 22mm OD, and 7mm width. |
| Open | Seal Type | No integral seals or shields. Allows for high-speed operation and custom lubrication but requires a clean environment or external sealing. |
| ABEC1 | Tolerance Class | Specifies standard precision tolerances for runout and dimensions, suitable for most general-purpose applications. |
| MC3 | Radial Internal Clearance | Indicates a Normal (C3) clearance group, providing slightly greater internal space than standard to accommodate thermal expansion in applications. |
627 Bearing Structural Features & Performance Benefits
- Optimized Deep Groove Raceway: The deep groove geometry of both inner and outer rings enables the bearing to support significant radial loads and moderate axial loads in both directions, offering versatile load-handling capability.
- Stainless Steel Cage: The use of a stainless steel cage ensures high strength, corrosion resistance, and reliable performance at the limiting speed of 30,000 rpm, contributing to smooth operation and reduced wear.
- Precision Chrome Steel Construction: Manufactured from high-grade chrome steel for rings and balls, this bearing provides high hardness, wear resistance, and a long operational life under demanding conditions.
- Normal Radial Internal Clearance (MC3): The C3 clearance is engineered to accommodate shaft and housing fits, as well as thermal expansion during operation, preventing premature failure due to excessive preload.
- Compact and Lightweight Design: With a total weight of only 12.7 grams, the 627 bearing offers a space-saving solution without compromising on performance, ideal for compact assemblies.
627 Bearing Typical Application Areas
The 627 bearing is widely used in various sectors due to its reliability and compact size. Key application areas include:
- Small Electric Motors: Ideal for spindle support in small fans, blowers, and power tools.
- Precision Instruments: Used in optical devices, gauges, and medical equipment requiring smooth, low-friction rotation.
- Office Automation Equipment: Critical component in printers, scanners, and copiers.
- Automotive Auxiliary Units: Suitable for components like idler pulleys, water pump assemblies, and small alternators.
- General Machinery: Applicable in light-duty gearboxes, conveyors, and agricultural machinery.
