671 Miniature Deep Groove Ball Bearing | Ultra-Compact 1×2×1 Mm for Precision Instruments
The 671 is an extra-small miniature deep groove ball bearing from the metric 6700 series, designed for applications where space is at an absolute premium and precise rotational motion is required. With its minute 1mm bore and ultra-compact 1x2x1 mm dimensions, this micro-bearing is engineered for low-torque, high-speed performance. Despite its size, it retains the classic deep groove design to handle light radial and bidirectional axial loads, making it the ideal choice for miniature motors, dental handpieces, small gears, and precision instrumentation where smooth operation and reliability are critical.
671 Deep Groove Ball Bearing 1x2x1 mm | Metric Miniature Series | Thin-Section Design
A fundamental component in micro-mechanical engineering, this bearing utilizes the proven deep groove geometry scaled down to sub-miniature proportions. It ensures very high-speed capability and minimal frictional torque. Engineered for continuous operation at speeds reaching 130,000 r/min with grease lubrication . The 671 is manufactured to precise tolerances, making it a trusted component for high-end miniature drives and sensitive laboratory equipment.

This ultra-miniature bearing is ideally suited for a wide array of precision and light-load machinery:
Manufactured to ABEC-1 precision standards (with higher grades available), the 671 ensures consistent quality in a micro-package. The precision-ground raceway grooves and carefully selected micro-balls facilitate exceptionally stable rotation, contributing to efficient power transmission and minimal noise in sensitive instruments.
As a member of the thin-section miniature family, the 671 is designed for minimal centrifugal force and low frictional torque. Manufactured from high-purity chrome steel (GCr15/SAE 52100), its design ensures superior durability even in continuous high-RPM applications, guaranteeing an extended service life despite its compact form.
This variant is typically available as open for ultra-low friction, or with double metal shields (ZZ) or rubber seals (2RS) for protection in compact assemblies. As a standard metric size, the 671 platform can also be specified with increased clearance (C3) or in stainless steel (AISI 440C) for applications requiring corrosion resistance or higher thermal stability.
| Bearing Type | Single Row Deep Groove Ball Bearing |
| ISO Dimension Series | 67 Series |
| Basic Designation | 671 |
| Suffix | Open |
| 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) | 130,000 r/min |
| Limiting Speed (Oil) | 150,000 r/min |
| Weight (approx.) | 0.03 g |
Direct replacement and cross-reference for industry standard part numbers:
While the 671 open variant is supplied as standard for ultra-high-speed applications, the base design allows for customization to meet specific operational demands:
• Open (671): Standard configuration. Ideal for oil-lubricated systems or applications requiring the absolute lowest possible torque, such as in micro-turbines.
• Double Shielded (671 ZZ / 2Z): For applications where grease retention is needed and protection against large debris particles is required in compact, sealed-for-life assemblies.
• Double Sealed (671 2RS / 2RS1): For enhanced protection against moisture, dust, and fine contaminants in harsh environments like medical handpiece cleaning cycles.
• Increased Clearance (671 C3): Suitable for applications where slight temperature differentials between inner and outer rings might occur.
• Stainless Steel (671 SUS): Provides superior corrosion resistance for food-grade, medical, or marine applications.
"For precision medical tools, high-speed dental equipment, and miniature robotics, the 671 offers a robust and reliable bearing solution in the smallest of packages. Specify seal suffixes (2RS) or stainless steel material to perfectly match your operating environment."
The 673-ZZ is a compact and lightweight miniature deep groove ball bearing engineered for precision applications where space is limited and reliability is paramount. Featuring double metal shields (ZZ) , this miniature bearing provides effective protection against dust ingress and ensures the retention of lubricating grease in confined assemblies. With a 3mm bore, 6mm outer diameter, and 2.5mm width, it is the ideal solution for small electric motors, dental handpieces, 3D printer components, and radio-controlled models where smooth, consistent operation under light loads is required.
Details
The 6708-2RS is an Extra-Thin, Double Rubber-Sealed Deep Groove Ball Bearing designed for applications where space is at an absolute premium. Featuring a unique extremely slim cross-section (6 mm width) and a relatively large 40 mm bore, this bearing provides a compact rolling solution for mechanisms requiring low frictional torque and reliable sealing. Equipped with two contact rubber seals (2RS) , it provides superior protection against moisture and fine contaminants, ensuring long-term, maintenance-free operation in precision instruments and light-duty systems.
Details
The 6709-2RS is an Extra-Thin Section, Double Rubber-Sealed Deep Groove Ball Bearing engineered for applications requiring minimal weight and compact axial space. Featuring an ultra-narrow 6 mm cross-section paired with a 45 mm bore, this bearing delivers reliable rotational support where traditional bearings cannot fit. Equipped with two non-removable rubber contact seals (2RS) , it provides lifelong grease retention and effective exclusion of dust and moisture, ensuring maintenance-free operation in precision instruments and light industrial drives .
Details
The 6709-ZZ is a precision Thin Section Deep Groove Ball Bearing designed for applications where space is limited and weight reduction is critical. Featuring a double shielded design (ZZ) with pressed steel covers on both sides, it effectively retains grease and excludes light contamination while maintaining minimal rotational torque. With its ultra-slim 45x55x6 mm cross-section, this bearing is engineered for compact mechanical and electromechanical systems .
Details
The 6710-2RS is a precision Thin Section Deep Groove Ball Bearing engineered for applications demanding minimal radial space and enhanced protection. Featuring a double contact rubber seal (2RS) on both sides, it provides superior exclusion of moisture, dust, and fine contaminants while retaining lubricant for extended maintenance-free operation. With its ultra-slim 50x62x6 mm cross-section, this bearing is ideal for compact industrial drives, medical devices, and automation equipment .
Details
Engineered specifically for restricted-space environments, the 6710-ZZ is an ultra-thin section deep groove ball bearing that delivers uncompromising precision without unnecessary bulk. Equipped with dual non-contact metal shields (ZZ), this bearing effectively blocks particulate contamination while permanently retaining its high-quality factory lubrication. Featuring a large 50mm bore, a 62mm outer diameter, and a remarkably slim 6mm width, it is the ultimate solution for robotics, optical equipment, and industrial automation assemblies where weight reduction and tight radial clearances are critical.
Details
The 6711-2RS is a high-performance, extra-light metric bearing designed for applications where radial space is at a premium and environmental protection is a necessity. Featuring contact rubber seals (2RS) on both sides, this thin-section bearing provides a superior barrier against moisture, dust, and fine particulates compared to shielded versions. With a 55mm bore and a slim 7mm width, it offers a perfect balance of large-diameter shaft support and a minimalist mounting footprint, making it indispensable for modern automated machinery.
Details
The 6711-ZZ is a specialized thin-section radial bearing engineered for high-speed rotation where space efficiency is a primary design requirement. Featuring dual non-contact metal shields (ZZ), this bearing provides a robust barrier against dust and debris while maintaining the lowest possible rotational friction. With a 55mm bore diameter and a slim 7mm width, it is the premier choice for large-diameter shafting in robotics, optical instruments, and precision automation where thermal buildup must be kept to a minimum.
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