MR93zz
MR 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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MR93zz Bearing Product Overview & Core Advantages
The MR93zz is a metric miniature ball bearing designed for high-precision, compact applications. As a single row deep groove ball bearing, it is optimized to handle primarily radial loads efficiently. Its shielded design offers protection from contamination while maintaining low friction, making it a reliable choice for applications demanding smooth operation and long service life. The combination of chrome steel rings, a stainless steel cage, and precision manufacturing to ABEC1 tolerance class ensures consistent performance and durability in demanding environments.
MR93zz Bearing Model Code Explained, Specifications & Naming Convention
The model number MR93zz provides specific technical information:
- MR: Denotes a metric series, miniature radial ball bearing.
- 9: Indicates the series, relating to the cross-sectional size and load capacity.
- 3: Represents the bore diameter code. For this series, a code of '3' corresponds to a 3 mm bore diameter.
- zz: Signifies that the bearing is equipped with shields on both sides (non-contact). This helps retain lubrication and exclude larger contaminants, contributing to its maintenance-free characteristics in many applications.
MR93zz Bearing Structural Features & Performance Benefits
Robust Construction for Reliability: The bearing features rings and balls made from high-carbon chrome steel, providing excellent hardness and wear resistance. The stainless steel cage ensures stability and corrosion resistance, guiding the six precision balls smoothly.
Optimized Load Capacity: The deep groove raceway geometry is engineered to support significant radial dynamic loads (109 lbf) and moderate axial loads in both directions, making it versatile for various load conditions.
High-Speed Capability: With a limiting speed of 56,000 rpm, this bearing is suitable for high-velocity applications. The low-friction design and effective cage contribute to stable operation at high rotational speeds.
Precision and Consistency: Manufactured to ABEC1 tolerance class with a controlled radial internal clearance (MC3: 0.002mm to 0.013mm), this bearing delivers predictable performance, reduced vibration, and smooth running.
MR93zz Bearing Typical Application Areas
The MR93zz is ideally suited for a wide range of compact and precision devices, including:
- Small DC Motors and Stepper Motors
- Precision Instruments and Optical Encoders
- Office Automation Equipment (e.g., printers, scanners)
- Medical Devices and Dental Handpieces
- Robotics and Small Gearboxes
- Computer Cooling Fans and Spindles
