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68 Series
Home Deep Groove Ball Bearings 68 Series

6805-2RS Deep Groove Ball Bearing For Precision Robotics & High-Speed Spindles | 25×37×7 mm

6805-2RS Deep Groove Ball Bearing For Precision Robotics & High-Speed Spindles | 25×37×7 mm

The 6805-2RS is a compact, thin-section deep groove ball bearing engineered for applications demanding high rotational accuracy within tight spatial envelopes. Featuring dual contact rubber seals (2RS), this configuration provides exceptional defense against fine particulate contamination and moisture while ensuring permanent grease retention for maintenance-free operation. With a 25mm bore, 37mm outer diameter, and a slim 7mm width, it serves as a critical component for precision instrumentation, high-speed spindle assemblies, and compact electric drives where reliability and minimal friction are paramount.

6805-2RS Deep Groove Ball Bearing 25x37x7 mm | Metric Thin Section | Double Sealed

Manufactured to strict ISO dimensional and running accuracy standards, the 6805-2RS combines a thin cross-section with deep raceway geometry to support both radial and bidirectional axial loads. The non-fill slot design allows for a full complement of precision-grade balls, ensuring smooth rotation and consistent performance under variable operating conditions. This model is widely adopted in applications where space savings cannot compromise load capacity or operational longevity.

 

6805-2RS Deep Groove Ball Bearing For Precision Robotics & High-Speed Spindles | 25×37×7 mm

Comprehensive Applications

Well-suited for precision equipment and high-speed machinery across multiple sectors:

Robotics & Automation
  • Collaborative robot (cobot) joint actuators
  • Precision linear guide carriages
  • Automated pick-and-place system rollers
  • Stepper motor support shafts
Medical & Laboratory Equipment
  • Dental handpiece turbines
  • Surgical power tool spindles
  • Centrifuge rotors
  • Laboratory mixing and agitation devices
Office & Consumer Appliances
  • High-speed printer roller assemblies
  • Scanner optical unit carriages
  • Hard disk drive spindle motors
  • Small appliance pump impeller supports
Electric Motors & Drives
  • Compact servo motors and frameless torque motors
  • Brushless DC (BLDC) motor rotor supports
  • Cooling fan assemblies for electronics
  • Small generator and alternator components

Key Performance Features

01. Enhanced Contamination Exclusion

The 2RS designation signifies dual non-contact rubber seals molded from oil-resistant nitrile rubber (NBR). These seals maintain light contact with the inner ring raceway, creating an effective barrier against airborne dust, liquid splashes, and fibrous debris. This design significantly extends relubrication intervals and protects internal components in environments where cleanliness cannot be guaranteed.

02. High-Speed Capability in Compact Format

With a slim 7mm cross-section, the 6805-2RS achieves high limiting speeds while occupying minimal housing space. The precision-ground raceways and carefully controlled internal clearance minimize heat generation during high-speed operation. This makes the bearing an ideal choice for spindle applications in woodworking, PCB drilling, and small-scale machining where rapid acceleration and sustained RPM are required.

03. Precision Manufacturing for Quiet Operation

Constructed from vacuum-degassed chrome steel (GCr15 / SAE 52100), the 6805-2RS undergoes rigorous dimensional and geometrical inspection. The use of Grade 10 balls and a low-vibration cage ensures quiet, smooth performance suitable for noise-sensitive environments. For applications demanding ultra-low vibration signatures, EMQ (Electric Motor Quality) variants with reduced noise characteristics are available upon request.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 6800 Series (Thin Section)
Basic Designation 6805
Suffix 2RS (Double Contact Rubber Seals)
Bore Diameter (d) 25 mm
Outer Diameter (D) 37 mm
Width (B) 7 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard / P5 Grade Available
Seal Material Nitrile Rubber (NBR) with Steel Insert
Dynamic Load Rating (Cʳ) 4.3 kN
Static Load Rating (C₀ʳ) 2.9 kN
Limiting Speed (Grease) 16,000 - 19,000 r/min
Limiting Speed (Oil) --
Weight (approx.) 0.02 kg

Interchange Part Numbers

Direct replacement for industry-standard bearings:

  • SKF: 6805-2RS1
  • NSK: 6805VV
  • FAG6805-2RSR
  • NTN: 6805LLU
  • KOYO: 6805-2RS
  • TIMKEN: 6805-2RS

Design & Configuration

The 6805-2RS is factory-filled with high-quality lithium-based grease suitable for a wide temperature range and sealed with double contact rubber seals. This standard configuration balances protection, speed capability, and torque for most precision applications. For environments requiring higher speed with reduced drag, a shielded (ZZ) or open variant can be substituted. Stainless steel (AISI 440C) versions are available for applications involving exposure to mild corrosive agents, and C3 internal clearance options accommodate applications with higher thermal expansion.

"Engineered for the intersection of compact design and high-speed performance, the 6805-2RS delivers precision reliability for next-generation robotics, medical devices, and miniature power transmission systems."

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Details

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