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63 Series
Home Deep Groove Ball Bearings 63 Series

6305-2RS Sealed Deep Groove Ball Bearing | High-Performance Radial Support | 25×62×17 mm

6305-2RS Sealed Deep Groove Ball Bearing | High-Performance Radial Support | 25×62×17 mm

The 6305-2RS is a high-capacity, rubber-sealed deep groove ball bearing engineered for demanding industrial environments where debris exclusion and grease retention are paramount. Featuring a 25mm bore and a robust 62mm outer diameter, this model offers a superior balance between radial load rating and high-speed stability. The dual-lip contact seals (2RS) provide an airtight barrier against dust, moisture, and contaminants, making it a "lubricated-for-life" solution that eliminates the need for manual maintenance in inaccessible assemblies.

6305-2RS Deep Groove Ball Bearing 5x62x17 mm | Medium Series | Maintenance-Free Dust-Proof Design

Built with premium-grade GCr15 chrome steel and deep, honed raceways, the 6305-2RS is optimized for quiet operation and low vibration under heavy mechanical stress. The internal clearance is factory-calibrated to accommodate thermal expansion, ensuring the bearing maintains its structural integrity in high-torque applications. By utilizing high-quality synthetic grease, this bearing achieves a long service life in both horizontal and vertical mounting positions, serving as a reliable backbone for electric motors, agricultural machinery, and heavy-duty power transmissions.

6305-2RS Sealed Deep Groove Ball Bearing | High-Performance Radial Support | 25×62×17 mm

Comprehensive Applications

The 6305-2RS is the standard choice for machinery operating in harsh or high-load conditions:

Industrial Motors & Power Generation
  • Medium-sized AC/DC electric motors
  • Portable generators and alternators
  • Industrial ventilation and blower fans
Agricultural & Construction Equipment
  • Tractor wheel hubs and drive shafts
  • Conveyor belt idler rollers
  • Hydraulic pump internal supports
Automotive & Transportation
  • Vehicle alternators and starters
  • Gearbox input and output shafts
  • Light truck axle assemblies
Heavy-Duty Power Tools
  • Industrial-grade bench grinders
  • Large masonry saws and drills
  • Woodworking planers and jointers

Key Performance Features

01. Dual-Lip Contact Sealing (2RS)

The reinforced NBR (Nitrile Butadiene Rubber) seals are designed to keep the internal grease clean while preventing leakage. This specialized sealing technology ensures the bearing can operate in dusty or humid environments without premature failure.

02. Enhanced Radial Load Capacity

As part of the 6300 Medium Series, this bearing features larger balls and deeper grooves than the 6000 or 6200 series. This results in significantly higher static and dynamic load ratings, making it suitable for high-impact applications.

03. Pre-Lubricated for Efficiency

Every 6305-2RS is pre-filled with the optimal volume of high-speed synthetic grease. This factory lubrication reduces friction from the first rotation and extends the replacement cycle, lowering the overall cost of ownership for end-users.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 6300 Series (Metric)
Basic Designation 6305
Suffix 2RS (Rubber Seals on Both Sides)
Bore Diameter (d) 25 mm
Outer Diameter (D) 62 mm
Width (B) 17 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard / P5 Grade Available
Cage Material Riveted Steel
Dynamic Load Rating (Cʳ) 23.4 kN
Static Load Rating (C₀ʳ) 11.6 kN
Limiting Speed (Grease) 7,500 r/min
Limiting Speed (Oil) --
Weight (approx.) 0.232 kg

Interchange Part Numbers

Fully compatible with international standard 6305-2RS designations:

  • SKF: 6305-2RS1
  • NSK: 6305DDU
  • FAG6305-2RSR
  • NTN: 6305LLU
  • KOYO: 6305-2RS
  • NMB: 6305-2RS

Design & Configuration

The 6305-2RS is supplied as a completely sealed unit, pre-filled with high-performance lithium-based grease. The double-lip NBR (Nitrile Butadiene Rubber) seals are designed to maintain a permanent internal lubrication environment, eliminating the need for external oiling systems. This "fit-and-forget" configuration is engineered for environments where maintenance access is limited and maximum protection against environmental contaminants is required. For applications involving extreme temperatures or vacuum conditions, we also offer custom high-temp grease fillings upon request.

"Engineered for durability and reliability, the 6305-2RS provides a robust, maintenance-free solution for heavy-duty radial loads in challenging industrial conditions."

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