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MR Series
Home Deep Groove Ball Bearings MR Series

MR95-ZZ Miniature Shielded Ball Bearing | High-Speed Micro Rotation | 5×9×3 mm

MR95-ZZ Miniature Shielded Ball Bearing | High-Speed Micro Rotation | 5×9×3 mm

The MR95-ZZ is an ultra-compact, single-row deep groove ball bearing engineered for applications that demand high-speed rotation and minimal friction within tightly constrained spaces. With microscopic dimensions of just 5×9×3 mm, this bearing is equipped with dual pressed steel shields (ZZ). Unlike rubber seals, these non-contact metal shields provide excellent protection against larger particulates and dust without generating drag. This frictionless shielding ensures the bearing can operate at exceptionally high RPMs while retaining its internal lubrication, making it an indispensable component for sensitive, high-velocity micro-mechanisms.

MR95-ZZ Deep Groove Ball Bearing 5×9×3 mm | MR Series – Low Friction & High Velocity

Designed to bridge the gap between microscopic scale and high-performance durability, the MR95-ZZ excels in environments where rotational speed and power efficiency are critical. Whether stabilizing the core of a miniature drone motor or ensuring the smooth operation of precision measuring instruments, this bearing delivers. The metal shields act as a reliable barrier against everyday debris, while the optimized internal geometry allows for whisper-quiet, low-vibration operation even during continuous, high-frequency rotational cycles.

MR95-ZZ Miniature Shielded Ball Bearing | High-Speed Micro Rotation | 5×9×3 mm

Comprehensive Applications

Perfectly suited for mechanical designers, hobbyists, and automation engineers who require unhindered speed and reliability in micro-assemblies:

RC Models & Aerial Drones
  • Micro RC Helicopter Tail Rotors
  • Miniature Brushless Motor Shafts
  • 1/24 and 1/28 Scale RC Car Axles
  • Compact Drone Gimbal Systems
Precision Electronics & Computing
  • High-Speed CPU Cooling Fans
  • Hard Drive Spindle Motors
  • Micro 3D Printer Extruder Assemblies
  • VR Tracking Base Station Motors
Medical & Dental Instruments
  • High-Speed Dental Handpiece Turbines
  • Handheld Surgical Drills
  • Micro-Centrifuge Rotary Components
  • Portable Diagnostic Equipment
Industrial Micro-Automation
  • Miniature Rotary Encoders
  • Precision Optical Lens Adjusters
  • Automated Micro-Dispensing Valves
  • Compact Stepper Motors

Key Performance Features

01. Dual Pressed Steel Shields (ZZ)

The "ZZ" designation indicates the presence of metallic shields on both sides of the bearing. These shields are precision-stamped to sit closely against the inner ring without making physical contact. This design prevents large debris from entering the raceway and retains the grease, all while maintaining a near-zero friction coefficient for maximum rotational velocity.

02. GCr15 Chrome Steel Construction

Forged from premium GCr15 Chrome Steel (SAE 52100), the bearing components undergo rigorous heat treatment to achieve superior Rockwell hardness. This ensures the rolling elements and raceways resist wear and fatigue, maintaining P5-level precision even under the stress of continuous high-speed operation.

03. Ultra-Lightweight 5mm Bore Design

Maximizing space efficiency, the 5mm inner diameter and incredibly slim 9mm outer diameter allow for seamless integration into the smallest devices. Weighing less than a single gram, the MR95-ZZ adds virtually no mass to your assembly, preserving the power-to-weight ratio of battery-operated systems.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series MR Series (Miniature Metric)
Basic Designation MR95
Suffix ZZ (Double Metal Shields)
Bore Diameter (d) 5 mm
Outer Diameter (D) 9 mm
Width (B) 3 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class P5 / ABEC-5 Available
Shield Material Pressed SPCC Steel
Dynamic Load Rating (Cʳ) 0.430 kN (430 N)
Static Load Rating (C₀ʳ) 0.168 kN (168 N)
Limiting Speed (Grease) 40,000 r/min
Limiting Speed (Oil) 48,000 r/min
Weight (approx.) 0.00065 kg (0.65 grams)

Interchange Part Numbers

Global cross-reference equivalents for streamlined procurement:

  • SKF: MR95-2Z
  • NMB: L-950ZZ
  • NSK: MR95 ZZ
  • NTN: MR95 ZZ
  • FAG: MR95-2Z
  • KOYO: MR95 ZZ

Design & Configuration

For over 15 years, Welink Bearing has specialized in matching the right rotational hardware to complex engineering challenges. The MR95-ZZ provides the ultimate balance of dust protection and ultra-low friction. We offer bespoke customization for bulk orders, including specific low-viscosity instrument oils, customized grease fill percentages, and specialized internal clearances (such as C3 or C4) to perfectly match your high-speed operational requirements.

"Upgrade your micro-mechanisms with the MR95-ZZ shielded bearing—delivering frictionless velocity, compact precision, and sustained durability for your most demanding high-speed designs."

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