627zz
600 Series Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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627zz Bearing Product Overview & Core Advantages
The 627zz is a single row deep groove ball bearing designed for reliable performance in general industrial applications. This shielded bearing offers excellent radial load capacity and is manufactured to ABEC1 precision tolerances, ensuring consistent operation and interchangeability. Its compact design, featuring a 7mm bore and 22mm outside diameter, makes it an ideal solution for space-constrained assemblies requiring robust and cost-effective rotational motion support.
627zz Bearing Model Code Explained, Specifications & Naming Convention
- 627: Standard designation for a metric deep groove ball bearing with a 7mm bore and 22mm outside diameter.
- zz (or 2Z): Denotes that the bearing is equipped with shields on both sides. These non-contact shields are made from 300 Series Stainless Steel and provide effective protection against contamination from solid particles while minimizing friction.
627zz Bearing Structural Features & Performance Benefits
Robust Construction for Radial Loads: Built with chrome steel rings and balls, the 627zz is engineered to handle the specified radial dynamic load rating of 629 lbf and radial static load rating of 248 lbf. The deep groove raceway is optimized for supporting primarily radial loads.
Contamination Protection & Friction Management: The stainless steel shields (zz) protect the internal components from dust and debris, enhancing bearing life in unclean environments. The stainless steel cage ensures proper ball spacing and guidance, contributing to smooth operation.
Precision and Speed: Manufactured to ABEC1 tolerance class with an MC3 radial internal clearance (0.002mm to 0.013mm), this bearing provides reliable performance for a wide range of applications. It is capable of operating at a limiting speed of 30,000 rpm.
Note on Lubrication: This bearing requires lubrication for operation. The appropriate grease or oil must be selected based on the specific application's speed, temperature, and environmental conditions to achieve the stated performance.
627zz Bearing Typical Application Areas
The 627zz bearing is widely used in various compact machinery and devices, including:
- Small Electric Motors
- Power Tools
- Office Machinery (e.g., printers, scanners)
- Medical Devices
- Fans and Blowers
- Conveyor Systems
- Precision Instruments
