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60 Series
Home Deep Groove Ball Bearings 60 Series

606 Open Deep Groove Ball Bearing | 6×17×6 mm for High-Speed Enclosed Mechanisms

606 Open Deep Groove Ball Bearing | 6×17×6 mm for High-Speed Enclosed Mechanisms

The 606 Open is a precision-engineered, unshielded deep groove ball bearing designed specifically for applications where maximum rotational speed and unrestricted lubrication flow are required. With a 6mm bore, a 17mm outer diameter, and a 6mm width, this compact bearing operates without any seals or metal shields. This exposed design completely eliminates closure friction, allowing the 606 Open to achieve extraordinary RPMs while making it incredibly easy to continuously relubricate in oil-bath systems or enclosed gearbox housings.

606 Deep Groove Ball Bearing 6x17x6 mm | Metric Standard Series

Produced to exacting ISO dimensions by Welink Bearing, the 606 Open features deeply honed raceways and perfectly matched steel balls. Because it lacks protective side closures, this bearing relies on the machinery's external housing to keep contaminants out. It is the absolute optimal choice for clean, sterile environments or fully sealed mechanical assemblies where internal heat dissipation and unhindered lubricant circulation are essential for continuous, high-speed performance.

606 Open Deep Groove Ball Bearing | 6×17×6 mm for High-Speed Enclosed Mechanisms

Comprehensive Applications

Due to its frictionless design and compact 6mm bore, the 606 Open is a vital component in fully enclosed mechanical systems:

Precision Gearboxes & Transmissions
  • Miniature reduction gearheads and micro-transmissions
  • Enclosed planetary gear systems
  • Internal automotive actuators
High-Speed Rotary Equipment
  • High-RPM spindle motors and micro-milling heads
  • Internal supports for enclosed electric servo motors
  • Dental handpiece assemblies and medical drills
Industrial Instrumentation
  • High-accuracy optical rotary encoders
  • Sensitive laboratory measuring devices
  • Automated fluid metering mechanisms
Office Automation & Robotics
  • Internal printer and photocopier paper-feed rollers
  • Cleanroom robotic arm joints
  • Compact hard drive spindle hubs

Key Performance Features

01. Unrestricted Lubrication Access

The open cage configuration allows lubricating oil or grease to flow freely through the rolling elements. This makes the 606 Open perfect for machinery designed with internal oil baths, circulating oil systems, or automated central lubrication lines, allowing for excellent heat dissipation and a prolonged operational life.

02. Zero-Friction Rotational Dynamics

Without the physical drag caused by rubber seals or the slight air-resistance of metal shields, the 606 Open provides the lowest possible starting and running torque. This enables lightning-fast acceleration and ensures that the bearing consumes virtually no mechanical energy, making it highly efficient for micro-motors.

03. Industrial-Grade GCr15 Steel

Crafted from high-purity GCr15 chrome steel (AISI 52100), the inner and outer rings, as well as the ball elements, are heat-treated to withstand intense mechanical stress. The rigid steel cage maintains precise ball spacing, minimizing vibration even when operating near maximum limiting speeds.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series Standard Metric Series (60 Series)
Basic Designation 606
Suffix Open (No Shields or Seals)
Bore Diameter (d) 6 mm
Outer Diameter (D) 17 mm
Width (B) 6 mm
Material (Races & Balls) High-Carbon Chrome Steel (GCr15 / AISI 52100)
Precision Class ABEC-1 (ABEC-3 / ABEC-5 Upgrades Available)
Closure Type Unshielded / Open
Dynamic Load Rating (Cʳ) 2.26 kN
Static Load Rating (C₀ʳ) 0.84 kN
Limiting Speed (Grease) 40,000 r/min
Limiting Speed (Oil) 48,000 r/min
Weight (approx.) 0.006 kg (6 g)

Interchange Part Numbers

This bearing is a direct dimensional replacement for the following manufacturer numbers:

  • NSK: 606
  • SKF: 606
  • KOYO: 606
  • NTN: 606
  • Nachi: 606
  • FAG: 606
  • NMB: 606

Design & Configuration

The 606 Open is supplied lightly coated in an anti-rust preventative oil and is ready to be integrated into your equipment's specific lubrication system. Please note that open bearings are highly susceptible to dust and debris; they must be installed in clean environments. If your application exposes the bearing to the elements, Welink Bearing highly recommends our shielded 606-ZZ or rubber-sealed 606-2RS variants.

"Engineered for unhindered speed and seamless lubrication integration, the 606 Open bearing delivers frictionless precision for your most sophisticated enclosed mechanisms."

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