Primary: 6306 ceramic bearing, 6306 440C stainless steel bearing, Si3N4 ceramic ball bearing 6306, 6306 corrosion resistant bearing
Secondary: 6306 non magnetic bearing, 6306 electrical insulating bearing, 440C deep groove ball bearing, 304 cage bearing 6306, high speed 6306 bearing
6306 Deep Groove Ball Bearing | 440C Stainless Steel Rings | Si3N4 Ceramic Balls | 304 Stainless Steel Cage | Corrosion Resistant High Speed Non-Magnetic Insulated Bearing
6306 bearing with 440C stainless steel, Si3N4 ceramic balls and 304 cage. Corrosion-proof, non-magnetic, electrically insulated, high speed for marine, food, chemical and precision equipment. In stock.
Overview
Our 6306 deep groove ball bearing is engineered for extreme working conditions with a premium material combination: 440C stainless steel inner/outer rings, Si3N4 (silicon nitride) ceramic rolling elements, and 304 stainless steel cage. This hybrid ceramic 6306 bearing delivers superior corrosion resistance, high speed performance, non-magnetic and electrical insulation properties that standard steel bearings cannot match.
Key Specifications of 440C 6306 Si3N4 Bearings
| Parameter | Details |
| Bearing Model | 6306 Deep Groove Ball Bearing |
| Bore x OD x Width | 30mm x 72mm x 19mm |
| Ring Material | 440C Martensitic Stainless Steel |
| Ball Material | Si3N4 Silicon Nitride Ceramic |
| Cage Material | 304 Austenitic Stainless Steel |
| Sealing Options | Open / Metal Shield (ZZ) / Rubber Seal (2RS) |
| Precision Class | P0, P6, P5 |
| Hardness | Si3N4 Ceramic Balls: HRA ≥90; 440C Rings: HRC 58–60 |
| Temperature Range | -50°C to +250°C |
Material Advantages (Solve Buyer Pain Points)
440C Stainless Steel Rings
Outstanding corrosion & rust resistance to acids, alkalis, saltwater and harsh chemicals
High hardness and dimensional stability for heavy load and long service life
Better wear resistance than 304/316 stainless steel bearings
Si3N4 Silicon Nitride Ceramic Balls
70% lighter than steel balls: Reduces centrifugal force, lowers heat generation, boosts limit speed by 30–50%
100% electrical insulation: Eliminates electrical erosion in motors and electronic equipment
Non-magnetic: Ideal for precision medical and testing instruments
Low friction coefficient & self-lubricating: Reduces maintenance and lubricant usage
Excellent thermal shock and chemical corrosion resistance
304 Stainless Steel Cage
High toughness and stability at high speeds
Corrosion resistant and non-matching material compatibility
Smooth ball guidance for low noise and stable rotation
Top Performance Benefits
✅ Corrosion resistant for saltwater & chemical environments
✅ Non-magnetic & electrically insulating
✅ Higher max speed & lower heat than standard 6306 bearings
✅ Low noise, low friction, extended service life
✅ Reduced maintenance & downtime costs
Recommended Applications
Our 440C 6306 ceramic bearing is widely used in:
Marine & offshore equipment: Saltwater pumps, boat motors, yacht fittings
Chemical processing: Chemical pumps, valves, acid/alkali transfer systems
Food & pharmaceutical machinery: Sanitary processing equipment, medical devices
Electronic & precision instruments: Non-magnetic testing equipment, MRI components
High-speed drives: Spindles, centrifuges, textile machines
Electro-mechanical equipment: Electric motors, generators (electrical insulation protection)
Sports gear: High-end fishing reels, skateboards, fitness equipment
Why Buy Our 6306 Si3N4 Ceramic Bearing?
Genuine Materials: Full material certification available, third-party inspection supported
Precision Manufacturing: CNC grinding for tight tolerances, smooth running
Stock & Fast Lead Time: Standard 6306 open/P6 in stock, global shipping
Customization: ZZ, P5/P4 high precision, special clearances
Factory Direct Supply: Competitive wholesale pricing for distributors and OEMs
Packaging & Shipping
Industrial neutral packaging or custom brand packaging
Secure carton/pallet packing
Worldwide express & sea freight available
Contact Us
Request a quote for 6306 440C Si3N4 ceramic bearings or get technical support for your specific application. Our engineering team will help you select the right bearing solution.
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Dimensions
