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68 Series
Home Deep Groove Ball Bearings 68 Series

6812-2RS Thin Section Deep Groove Ball Bearing For Compact Machinery & Robotics | 60×78×10 mm

6812-2RS Thin Section Deep Groove Ball Bearing For Compact Machinery & Robotics | 60×78×10 mm

The 6812-2RS is a premium single-row thin-section deep groove ball bearing from the 6800 (61800) series, engineered with double-sided contact rubber lip seals. Featuring a substantial 60 mm bore against a surprisingly slim 78 mm outer diameter and 10 mm width, this bearing delivers excellent radial support while occupying minimal space. This unique extra-thin profile—paired with robust contamination exclusion and factory-filled lubrication—makes the 6812-2RS the ideal solution for large-diameter shafts in confined housings where weight reduction and maintenance-free operation are critical.

6812-2RS Deep Groove Ball Bearing 60×78×10 mm | 6800 Series | Double Contact Rubber Seals (2RS)

Designed for demanding mechanical environments that require large shaft accommodation without the bulk of standard bearings, the 6812-2RS utilizes dual synthetic rubber seals to physically block out moisture, dust, and operational debris. Simultaneously, these closures ensure the high-quality factory grease remains securely inside the raceways for the bearing's entire service life. Fitting perfectly into the same 60 × 78 × 10 mm footprint as its open (6812) or shielded (6812-ZZ) counterparts, this sealed variant sacrifices a marginal amount of limiting speed in exchange for vastly superior ingress protection—a crucial advantage in industrial and automated settings where cleanliness cannot be guaranteed.

6812-2RS Thin Section Deep Groove Ball Bearing For Compact Machinery & Robotics | 60×78×10 mm

Comprehensive Applications

The 6812-2RS is deployed wherever a 60 mm shaft requires reliable, low-friction rotation within a highly constrained spatial envelope:

Power Transmission & Printing
  • Printing press rollers and paper feed mechanisms
  • Compact gearboxes requiring space-saving internal components
  • Textile machinery drive rollers exposed to fabric lint and dust
Robotics & Automation
  • Articulated robotic arm joints requiring thin-section rotational support
  • Automated guided vehicle (AGV) drive and steering pivot mechanisms
  • Precision rotary indexing tables and motion control systems
Industrial Electric Motors & HVAC
  • High-efficiency electric motor rebuilds and upgrades
  • Commercial HVAC blower units and compressor shafts
  • Lightweight industrial cooling fans and extractors
Aerospace & Specialized Equipment
  • Lightweight aerospace mechanisms requiring high-diameter, low-weight bearings
  • Optical and targeting system gimbal mounts
  • Advanced medical imaging equipment components

Key Performance Features

01. Space-Saving Thin Section Design

The 6800 series is specifically proportioned to provide a massive inner ring (60 mm) within a highly restrictive outer ring (78 mm). The 6812-2RS minimizes cross-sectional area, allowing design engineers to reduce the overall weight and size of their assemblies without compromising on the shaft diameter or structural integrity of the machine.

02. Lifetime Lubrication with Advanced Sealin

Pre-lubricated at the factory with premium grease tailored for its operational parameters, the 6812-2RS eliminates the need for external maintenance. The flexible rubber lip seals engage directly with the inner ring, acting as an impermeable barrier against airborne particles, cutting fluids, and dirt, ensuring the internal lubrication is never diluted or depleted.

03. Direct Drop-In Upgrade for Open/Shielded Configurations

Sharing the exact 60x78x10 mm dimensions of the standard 6812 and 6812-ZZ, this 2RS version offers a frictionless transition for systems needing enhanced contamination defense. If an existing assembly is suffering from premature wear due to environmental debris, swapping to the 6812-2RS provides an instant upgrade without requiring any modifications to the shaft or housing.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 6800 / 61800 Series (Extra Thin)
Basic Designation 6812
Suffix Double Contact Rubber Seal (2RS)
Bore Diameter (d) 60 mm
Outer Diameter (D) 78 mm
Width (B) 10 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard (P0) / P5 Available
Cage Material Pressed Steel
Dynamic Load Rating (Cʳ) 11.5 kN
Static Load Rating (C₀ʳ) 10.6 kN
Limiting Speed (Grease) ~8,000 r/min
Limiting Speed (Oil) N/A — permanently sealed
Weight (approx.) 0.105 kg

Interchange Part Numbers

To facilitate easy cross-referencing, the 6812-2RS aligns with various global manufacturer naming conventions:

  • SKF: 61812-2RS1
  • NSK: 6812DDU, 6812VV
  • FAG (Schaeffler): 6812-2RSR
  • NTN: 6812LLU, 6812LLB
  • KOYO: 6812-2RS
  • NACHI: 6812-2NSE
  • Generic: 6812-2RS, 61812-2RS, 6812RS, 6812EE, 6812LU

Design & Configuration

The 6812-2RS operates as a radial ball bearing utilizing a carefully calculated ball complement to handle moderate radial and axial loads within a very tight cross-section. Generating an 11.5 kN dynamic load capacity, it offers an outstanding strength-to-weight ratio for a bearing of this slimness. While the contact rubber seals create a slight friction increase compared to non-contact metal shields (6812-ZZ), they cap the grease speed limit around 8,000 r/min. For ultra-high-speed, clean-room environments, the ZZ variant may be utilized; however, for any real-world industrial application exposed to dust, moisture, or lint, the 6812-2RS is the optimal technical choice. It guarantees internal raceway purity independent of the machine's external housing design.

"When your design demands a 60 mm shaft but space and weight are strictly limited, the 6812-2RS thin-section bearing delivers the perfect balance of capacity and compactness. By combining the slim profile of the 6800 series with dual contact rubber seals and self-contained lubrication, it serves as a maintenance-free, resilient solution for robotics, motors, and printing machinery operating in imperfect environments."

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Details

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