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67 Series
Home Deep Groove Ball Bearings 67 Series

671-ZZ Miniature Deep Groove Ball Bearing | Double Shielded 1×2×1 mm for High-Speed Precision Assemblies

671-ZZ Miniature Deep Groove Ball Bearing | Double Shielded 1×2×1 mm for High-Speed Precision Assemblies

The 671-ZZ is a double shielded miniature deep groove ball bearing engineered for applications requiring high rotational speed combined with basic protection against particulate contamination. Featuring a 1mm bore and ultra-compact 3mm outer diameter, this micro-bearing incorporates non-contact metal shields that retain factory-applied lubricant while excluding larger airborne debris. The deep groove raceway geometry ensures stable handling of light radial loads, while the shield configuration maintains minimal frictional resistance, making it particularly suitable for high-speed dental tools, miniature spindle systems, and precision instrumentation where extended lubrication life and unrestricted rotation are equally important.

671-ZZ Deep Groove Ball Bearing 1x2x1 mm | Metric Miniature Series | Double Metal Shield Configuration

Designed for applications where speed capability cannot be compromised by sealing drag, this bearing integrates the proven deep groove architecture with thin-section metal shields. The non-contact shield design effectively retains grease lubricant while creating a labyrinth barrier against coarse contaminants, all without introducing additional frictional torque. Rated for continuous operation up to 120,000 r/min with shielded lubrication, the 671-ZZ represents an optimal compromise between protection and rotational freedom for compact precision mechanisms.

671-ZZ Miniature Deep Groove Ball Bearing | Double Shielded 1×2×1 mm for High-Speed Precision Assemblies

Comprehensive Applications

This double shielded miniature bearing is particularly well-suited for applications where high speed and basic contamination exclusion are required:

Dental & Medical Technology
  • High-Torque Dental Micromotors
  • Surgical Saw Oscillating Mechanisms
  • Laboratory Mixer Rotors
  • Micro-Dialysis Pump Systems
Precision Spindle & Drive Systems
  • Miniature Grinding Spindles
  • PCB Drilling Spindle Supports
  • Small Diameter Routing Tools
  • Precision Winding Machinery
Optical & Scanning Equipment
  • Rotating Mirror Assemblies
  • Barcode Scanner Mechanisms
  • Laser Marking Galvanometers
  • Optical Encoder Rotors
Automation & Light Industrial
  • Small Conveyor Roller Ends
  • Pneumatic Tool Rotors
  • Miniature Indexing Tables
  • Precision Tensioning Devices

Key Performance Features

01. High-Speed Optimized Shield Configuration

The 671-ZZ incorporates non-contact metal shields that maintain a controlled clearance between shield and inner ring land surfaces. This precision-engineered gap prevents lubricant egress while eliminating seal drag, allowing the bearing to achieve rotational speeds approaching those of open configurations. The result is extended high-speed capability without the torque penalties associated with contact sealing elements.

02. Lubrication Retention with Minimal Interference

Factory-packed premium grease is effectively retained by the double shield arrangement, ensuring consistent lubrication throughout the operational life of the bearing. The labyrinth-style protection provided by the shields reduces lubricant migration while preventing ingress of larger particles that could otherwise accelerate raceway and ball wear in high-RPM applications.

03. Balanced Protection for Compact Environments

While not offering the hermetic sealing of contact rubber seals, the 671-ZZ provides adequate protection for the majority of controlled-environment precision mechanisms. The reduced frictional characteristics make this configuration particularly advantageous in battery-powered instruments and torque-sensitive assemblies where every increment of rotational resistance affects overall system efficiency.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 67 Series
Basic Designation 671
Suffix ZZ (Double Non-Contact Metal Shields)
Bore Diameter (d) 1 mm
Outer Diameter (D) 2 mm
Width (B) 1 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard / P5 Grade Available
Cage Material Pressed Steel or Polyamide (depending on version)
Dynamic Load Rating (Cʳ) 88 - 95 N
Static Load Rating (C₀ʳ) 21 - 26 N
Limiting Speed (Grease) 120,000 r/min
Limiting Speed (Oil) 150,000 r/min
Weight (approx.) 0.03 g

Interchange Part Numbers

Direct replacement and cross-reference for industry standard double shielded miniature bearing part numbers:

  • SKF: 671-2Z
  • NSK: 671ZZ
  • FAG: 671.2Z
  • NTN: 671ZZ
  • KOYO: 671ZZ
  • TIMKEN: 671ZZ
  • MRC: 671ZZ

Design & Configuration

The 671-ZZ platform offers several configuration possibilities to address specific application requirements:

• Standard 671-ZZ: Double non-contact metal shields with premium grease lubrication for general high-speed instrumentation and precision drive applications requiring balanced protection and minimal torque.

• Stainless Steel 671-ZZ (440C): Corrosion-resistant variant for medical device applications, laboratory equipment, or environments with elevated humidity exposure.

• Increased Clearance (C3): Accommodates thermal expansion differentials in applications with dissimilar housing materials or elevated operating temperatures.

• High-Speed Grease Variant: Special low-viscosity lubricant formulation for applications pushing the upper speed limits of shielded miniature bearing configurations.

• P6 Precision Grade: Enhanced geometric accuracy for applications requiring minimal runout, such as optical scanning mechanisms and precision encoder systems.

"For high-speed dental micromotors, precision spindle assemblies, and optical scanning equipment requiring extended lubrication life without rotational drag, the 671-ZZ delivers reliable performance in the smallest available footprint. Select stainless steel specification for applications requiring enhanced corrosion resistance or regular sterilization exposure."

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