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62 Series
Home Deep Groove Ball Bearings 62 Series

6203-2RS Double Sealed Deep Groove Ball Bearing | Moisture-Resistant | 17×40×12 mm

6203-2RS Double Sealed Deep Groove Ball Bearing | Moisture-Resistant | 17×40×12 mm

The 6203-2RS is a highly versatile, medium-duty rotational component engineered for mechanical systems exposed to moderate contamination. Equipped with twin synthetic rubber seals (2RS), this bearing establishes a tight, protective boundary that aggressively blocks out moisture, ambient dust, and operational debris. Featuring a standard 17mm bore alongside a 40mm outer diameter, the 6203-2RS is the optimal selection for fractional horsepower motors, automotive alternators, and household appliances where sustained, maintenance-free performance is required.

6203-2RS Deep Groove Ball Bearing 17x40x12 mm | Versatile 62 Series | NBR Contact Seals

Built to endure daily operational stress, the 6203-2RS is manufactured from premium, wear-resistant GCr15 chrome steel. The integrated contact seals are molded from Nitrile Butadiene Rubber (NBR), a material specifically chosen to keep the factory-filled lubricant securely inside the raceways over the component's entire lifecycle. This strictly "lubricated-for-life" design bypasses the need for manual greasing intervals, making it a critical asset for enclosed motor assemblies or machinery operating in dusty, unmonitored environments.

6203-2RS Double Sealed Deep Groove Ball Bearing | Moisture-Resistant | 17×40×12 mm

Comprehensive Applications

The 6203-2RS delivers the resilient sealing capabilities necessary for a wide spectrum of demanding sectors:

Domestic Appliances
  • Washing machine drum supports
  • High-speed vacuum cleaner motors
  • HVAC blower fan mechanisms
  • Centrifugal juicer drive shafts
Power Tools & Workshop Equipment
  • Heavy-duty drill press spindles
  • Woodworking router assemblies
  • Portable angle grinder gearheads
  • Belt sander drive rollers
Electric Motors & Generators
  • Fractional horsepower motor shafts
  • Automotive alternator assemblies
  • Household appliance drive units
  • Industrial cooling fan rotors
Two-Wheeler & Light Vehicles
  • Motorcycle and scooter wheel hubs
  • ATV transmission gearboxes
  • Go-kart axle support systems
  • Electric bicycle hub motors

Key Performance Features

01. Balanced Radial and Axial Load Handling

Engineered with deep raceway grooves, the 6203-2RS is capable of accommodating both radial forces and moderate axial loads in both directions. Its robust construction provides the structural integrity needed to withstand the minor shock loads frequently encountered in power tools and automotive applications.

02. Superior Particle and Liquid Shielding

The primary advantage of the 6203-2RS lies in its advanced rubber sealing architecture. In contrast to standard metal shields, these NBR lips maintain constant, light friction against the inner ring. This physical interference effectively repels water splashes and fine grit, drastically extending the operational life of the bearing in challenging conditions.

03. Lifetime Lubrication Retention

The secure dual-lip 2RS design guarantees that the high-grade industrial grease remains trapped within the rolling elements, even during continuous operation. This steady lubrication minimizes metal-to-metal friction, ensuring quiet rotation and preventing the heat buildup that causes premature wear.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 62 Series (Light-to-Medium Duty)
Basic Designation 6203
Suffix 2RS (Double Contact Rubber Seals)
Bore Diameter (d) 17 mm
Outer Diameter (D) 40 mm
Width (B) 12 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard (P0) / P6 or P5 Available Upon Request
Seal Material Nitrile Butadiene Rubber (NBR)
Dynamic Load Rating (Cʳ) 9.56 kN
Static Load Rating (C₀ʳ) 4.75 kN
Limiting Speed (Grease) 12,000 r/min
Limiting Speed (Oil) --
Weight (approx.) 0.065 kg

Interchange Part Numbers

Seamlessly replaces the following standard 17mm bore sealed bearings:

  • SKF: 6203-2RS1
  • NSK: 6203DDU
  • FAG6203-2RSR
  • NTN: 6203LLU
  • KOYO: 6203-2RS
  • Nachi: 6203-2NSE

Design & Configuration

The 6203-2RS is a true "fit-and-forget" solution. While the contact friction from the NBR seals results in a moderately lower maximum speed ceiling compared to the shielded (ZZ) variant, it provides unparalleled longevity in environments prone to dirt and moisture. If your application requires ultra-high RPMs in a clean-room setting, consider utilizing our 6203-ZZ or Open 6203 configurations.

"Providing resilient, maintenance-free rotation for everyday machinery, the 6203-2RS is the standard for dependable sealed performance."

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