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MF Series
Home Deep Groove Ball Bearings MF Series

MF85-ZZ Ultra-Slim Shielded Design | Flanged Miniature Ball Bearing | 5×8×2.5mm

Precision MF85 ZZ Shielded Bearing 5x8x2.5mm compatible with NMB LF-850ZZ for RC Cars and Drones
MF85-ZZ Flanged Ball Bearing with 9.2mm Flange Diameter for Precise Axial Alignment in Micro Motors
High Speed 50000 RPM MF85-ZZ Bearing featuring GCr15 Chrome Steel for Medical and Optical Instruments
MF85 ZZ Flanged Metric Bearing showing Dual Metal Shields for Dust Protection and Maintenance-Free Operation

MF85-ZZ Ultra-Slim Shielded Design | Flanged Miniature Ball Bearing | 5×8×2.5mm

The MF85-ZZ is a high-precision, metric-series miniature ball bearing engineered with an integrated flange on the outer ring. This specific architecture is designed to simplify mechanical assemblies by providing a built-in locating surface, allowing the bearing to be securely positioned in thin-walled housings without internal shoulders. Featuring dual metal shields (ZZ), the MF85-ZZ balances high-speed performance with effective protection against environmental contaminants, making it a cornerstone component for space-sensitive precision engineering.

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MF85-ZZ Deep Groove Ball Bearing 5mm × 8mm × 2.5mm | Low-Profile Stability for Micro-Mechanisms

Developed for applications where every millimeter of space is critical, the MF85-ZZ offers a remarkably slim profile without compromising rotational accuracy. The presence of the flange ensures consistent axial alignment even under high-frequency vibration. By utilizing a shielded, pre-lubricated internal structure, this bearing minimizes maintenance requirements while providing the low-torque rotation necessary for sensitive electronic and medical instrumentation.

MF85-ZZ Flanged Miniature Ball Bearing | Ultra-Slim Shielded Design | 5×8×2.5mm

Comprehensive Applications

Optimized for electromechanical designers and micro-automation specialists who require reliable, flanged-mount rotation:

Office & Consumer Electronics
  • Cooling Fan Spindle Assemblies
  • High-Speed Document Feeders
  • Laser Scanning Mirror Rotors
  • Handheld Precision Power Tools
Micro-Motors & Robotics
  • Brushless DC (BLDC) Motors
  • Miniature Robotic Grippers
  • Precision Stepper Motor Dampers
  • Micro-Servo Positioning Gears
Medical & Scientific Equipment
  • Miniature Surgical Power Tools
  • Laboratory Diagnostic Shakers
  • Optical Scanning Mechanisms
  • Precision Metering Pumps
Hobbyist & RC Engineering
  • High-Performance RC Car Hubs
  • Drone Brushless Motor Outrunners
  • Remote Controlled Helicopter Rotors
  • Slot Car Transmission Systems

Key Performance Features

01. Integral Outer Ring Flange

The primary advantage of the MF85-ZZ is its precision-ground flange. This feature serves as a mechanical stop during installation, ensuring the bearing remains perfectly seated within the housing. It eliminates the need for snap rings or complex internal machining, reducing overall manufacturing costs and assembly time for compact devices.

02. Dual Metal Shielding (ZZ)

Equipped with two non-contact steel shields, the MF85-ZZ is factory-packed with high-performance grease. These shields are designed to keep lubricants in while preventing dust and fine debris from entering the raceways. This non-contact design ensures that the bearing maintains a high limiting speed with minimal frictional heat generation.

03. Industrial Grade GCr15 Chrome Steel

Manufactured from premium SAE 52100 (GCr15) Chrome Steel, the internal balls and raceways are hardened to resist wear and surface fatigue. This high-density metallurgical composition allows for exceptional dimensional stability and consistent P5/P6 precision tolerances even during continuous high-RPM operation.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series Metric Miniature Flanged
Basic Designation MF85
Suffix ZZ (Double Metal Shields)
Bore Diameter (d) 5 mm
Outer Diameter (D) 8 mm
Width (B) 2.5 mm
Flange OD (D1) 9.2 mm
Flange Width (B1) 0.6 mm
Material GCr15 Chrome Steel (SAE 52100)
Dynamic Load Rating (Cʳ) Approx. 278 N
Static Load Rating (C₀ʳ) Approx. 131 N
Limiting Speed (Grease) 50,000 RPM
Limiting Speed (Oil) 59,000 RPM
Weight (approx.) 0.60 grams

Interchange Part Numbers

Cross-reference equivalent part numbers for simplified BOM management:

  • SKF: F675ZZ
  • NMB: LF-850ZZ
  • NSK: F675ZZ
  • NTN: FL675ZZ
  • FAG: F675ZZ
  • KOYO: F675ZZ

Design & Configuration

With 15 years of deep expertise in B2B manufacturing and international trade, Welink Bearing provides precision-engineered components tailored for industrial success. The MF85-ZZ exemplifies our focus on micro-scale stability and high-speed efficiency. For OEM partners and large-scale manufacturing facilities, we accommodate custom production requests, including the application of ultra-low viscosity instrument oils, specialized internal clearance (MC3 or C3), and alternative stainless steel (AISI 440C) versions for corrosive environments.

"Enhance your micro-assemblies with the MF85-ZZ flanged series—engineered for uncompromising axial precision in space-limited designs."

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MF85-ZZ Flanged Bearing

5x8x2.5mm Shielded Bearing

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