SR4zz
SR Series Stainless Steel Miniature Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Ball & Washer Dimensions
Performance
Materials
Environment & Compliance
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SR4zz Bearing Product Overview & Core Advantages
The SR4zz is a precision miniature ball bearing designed for demanding applications requiring high reliability and consistent performance. Constructed entirely from stainless steel, this single row, shielded bearing offers excellent corrosion resistance. It is engineered to handle radial loads efficiently and is characterized by its compact bearing dimensions (0.25" bore, 0.625" OD), making it ideal for space-constrained assemblies. Its ABEC1 tolerance class ensures reliable operation for a wide range of industrial and precision instruments.
SR4zz Bearing Model Code Explained, Specifications & Naming Convention
- SR4: Denotes a specific series of miniature radial ball bearings with a 0.25" bore diameter.
- zz: Indicates that the bearing is equipped with shields on both sides (non-contact). This provides effective protection against contamination while minimizing friction, contributing to the bearing's limiting speed of 34,200 rpm.
Note: This model requires separate lubrication for optimal performance and longevity.
SR4zz Bearing Structural Features & Performance Benefits
Robust Construction: The use of 300 series stainless steel for the shields, along with stainless steel rings, balls, and cage, provides superior corrosion resistance and durability in harsh environments, with a wide temperature range of -86 to 230 °F.
High-Speed Capability: The non-contact shield design and optimized internal geometry allow for a high limiting speed, making it suitable for applications requiring rapid rotation.
Precision Performance: Manufactured to ABEC1 tolerance standards with a controlled radial internal clearance (MC3: 0.00008" to 0.0005"), this bearing ensures smooth and quiet operation, reducing vibration and noise.
SR4zz Bearing Typical Application Areas
Due to its compact size, corrosion resistance, and high-speed capability, the SR4zz bearing is widely used in:
- Small Electric Motors and Gearboxes
- Precision Instruments and Medical Devices
- Office Automation Equipment (e.g., printers, scanners)
- Radio Control Models and Drones
- Flow Meters and Pumps
