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MR Series
Home Deep Groove Ball Bearings MR Series

MR106 Open Miniature Deep Groove Ball Bearing | Ultra-Low Friction | 6×10×3 mm

MR106 Open Miniature Deep Groove Ball Bearing | Ultra-Low Friction | 6×10×3 mm

The MR106 Open is a high-precision, unsealed miniature ball bearing engineered for internal applications that demand the absolute minimum in rotational resistance. Characterized by its "Open" configuration, this 6×10×3 mm component lacks metal shields or rubber seals, completely eliminating any potential contact drag. By exposing the internal raceways and rolling elements, it allows for unrestricted, ultra-smooth motion. This design is the optimal choice for enclosed mechanical systems operating in clean environments, or within dedicated oil baths where continuous external lubrication is applied.

MR106 Deep Groove Ball Bearing 6×10×3 mm | MR Series – Maximum Velocity & Minimal Drag

Designed for extreme-speed operation, the unsealed MR106 prioritizes free-spinning performance over environmental defense. It is specifically manufactured for micro-mechanisms where space is strictly limited and reducing starting torque is a critical design requirement. Because there are no protective barriers to generate friction or trap heat, it achieves the highest possible RPM limits within the MR series. This makes it an indispensable asset for high-frequency internal gearboxes, delicate calibration instruments, and cleanroom automation.

MR106 Open Miniature Deep Groove Ball Bearing | Ultra-Low Friction | 6×10×3 mm

Comprehensive Applications

Tailored for mechanical engineers and product developers designing enclosed, high-efficiency micro-systems:

Enclosed Gearboxes & Micro-Drives
  • Internal Stepper Motor Gear Assemblies
  • Enclosed Servo Actuator Pivots
  • Miniature Robotics Joint Mechanisms
  • Micro-Transmission Systems
Precision Instruments & Optics
  • Internal Laser Targeting Arrays
  • Enclosed Camera Gimbal Stabilizers
  • Timepiece & Horology Testing Equipment
  • High-Accuracy Rotary Encoders
Specialty Electronics
  • Hard Disk Drive (HDD) Spindle Motors
  • Cleanroom Automated Handling Equipment
  • Internal Measurement and Sensor Systems
Medical & Dental Devices
  • High-Speed Dental Turbine Rotors (Oil Mist Lubricated)
  • Laboratory Micro-Centrifuge Internal Shafts
  • Enclosed Surgical Handpiece Internals

Key Performance Features

01. Unrestricted Open Architecture

By omitting seals and shields, the MR106 Open offers zero contact friction and the lowest possible starting torque. This design also provides immediate access for continuous oil lubrication and rapid heat dissipation in high-velocity operating environments.

02. Compact 6mm Bore for Micro-Engineering

With a 6mm inner diameter and a highly compressed 3mm width, this bearing delivers superior rotational stability in an extremely small footprint. Weighing just 1.0 gram, it drastically reduces the overall weight of portable and micro-mechanical assemblies.

03. Premium GCr15 Bearing Steel

Forged from high-carbon Chrome Steel (SAE 52100), the inner ring, outer ring, and balls undergo rigorous heat treatment. This results in exceptional surface hardness and wear resistance, allowing the bearing to maintain its P5 precision class even under continuous rapid cycling.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series MR Series (Miniature Metric)
Basic Designation MR106
Suffix None (Open Type)
Bore Diameter (d) 6 mm
Outer Diameter (D) 10 mm
Width (B) 3 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class P5 / ABEC-5 Available
Seal/Shield Type Open (Unsealed)
Dynamic Load Rating (Cʳ) 0.495 kN (495 N)
Static Load Rating (C₀ʳ) 0.218 kN (218 N)
Limiting Speed (Grease) 56,000 r/min
Limiting Speed (Oil) 67,000 r/min
Weight (approx.) 0.001 kg (1.0 gram)

Interchange Part Numbers

Common global manufacturer cross-references for engineering procurement:

  • SKF: MR106
  • NMB: L-1060
  • NSK: MR106
  • NTN: MR106
  • FAG: MR106
  • KOYO: MR106

Design & Configuration

The open configuration of the MR106 makes it the definitive choice for friction-sensitive, enclosed applications where external contaminants are not a concern. Its design maximizes high-speed efficiency and allows for easy integration into oil-bath systems. Backed by 15+ years of industrial manufacturing expertise, Welink Bearing provides comprehensive technical support, offering custom internal clearances (such as C2 or C3) and specialized anti-rust treatments to match your specific assembly requirements.

"Integrate the MR106 Open micro bearing into your enclosed mechanisms to guarantee zero-drag rotation and maximum RPM capabilities in your tightest spatial designs."

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