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6305 DU
6305 DU deep groove ball bearing
What benefits can you get from a deep groove ball bearing?
1.High load capacity: It can handle greater radial loads than other types of ball bearings.
2.Versatility: It can handle both radial and axial loads.
3.Low friction: It is designed to operate with minimal friction, making it ideal for high-speed applications.
4.Simplified maintenance: It generally requires less maintenance than other types of bearings, making it ideal for out-of-the-box operation.
- Overview
- Technical parameter
| Bore diameter | 25 mm |
| Outside diameter | 62 mm |
| Width | 17 mm |
| Weight | 0.232kg |
| Material, bearing | Bearing steel |
| Brand | FAG/SKF/KOYO/NSK/NACHI/NTN/TIMKEN |
| Sealing | ZZ/2RS/OPEN |
| Coating | Without |
-RS: One side with contact rubber seal
-2RS: Both sides with contact rubber seal
-RZ: One side with non-contact rubber seal
-2RZ: Both sides with non-contact rubber seal
-Z: One side with dust cover
-ZZ: Both sides with dust cover
-N: There is a retaining groove on the outer ring
Why Choose Deep Groove Ball Bearings? Core Advantages Explained
✅ Versatile Load Capacity
Bidirectional Axial Load Capacity: Standard designs handle radial loads while supporting bidirectional axial loads
High-Speed Performance: Point-contact design enables significantly higher speed limits than roller bearings, ideal for high-speed motor spindles
Angular Contact Alternative: With increased radial clearance, can perform like angular contact bearings for greater axial load capacity
✅ Economic Reliability
Low Manufacturing Cost: Standardized mass production ensures strong price competitiveness
Minimal Maintenance: Open designs enable lifetime lubrication; sealed bearings require zero maintenance
Extended Service Life: Normal operating life reaches 30,000-50,000 hours under rated conditions
✅ Installation Flexibility
Misalignment Compensation: Accommodates 2′~10′ of shaft deflection to compensate for installation errors
Multiple Configurations: Available in 11 structural variants including open, shielded (Z/ZZ), sealed (RS/2RS), and snap ring (N) types
Full Size Range: From miniature bearings with 1mm bore to extra-large types over 440mm outer diameter
Technical Specifications & Model Parameters
Key Dimensional Parameters
- Bore Diameter (d): 10mm-200mm (common range)
- Outer Diameter (D): 26mm-420mm
- Width (B): 8mm-80mm
- Chamfer Dimension (r): Affects installation convenience
Performance Metrics
| Parameter | Description | Typical Value (6205 Example) |
|---|---|---|
| Dynamic Load Rating (Cr) | Load capacity for 1 million revolutions life | 14.8 kN |
| Static Load Rating (Cor) | Load limit for permanent deformation | 7.8 kN |
| Speed Limit (Grease) | Maximum speed with grease lubrication | 15,000 r/min |
| Speed Limit (Oil) | Maximum speed with oil lubrication | 18,000 r/min |
| Friction Coefficient | Operating resistance indicator | 0.0010-0.0015 |
| Temperature Range | Operating environment temperature | -40°C to +120°C (standard) |
Popular Series Comparison
6000 Series: Compact structure, precise dimensions, and balanced performance
- 6200 Series: Light-load high-speed applications, ideal for precision instruments and small motors
- 6300 Series: Medium-load medium-speed, widely used in automotive transmissions and industrial pumps
- 6400 Series: Heavy-duty design for construction machinery and heavy equipment
- 61800/61900: Thin-section types for space-constrained applications
Why Choose Our Deep Groove Ball Bearings?
✅ Industry-Leading Quality - Manufactured from GCr15 bearing steel, HRC 60-65 hardness, ISO 9001 certified
✅ Complete Inventory - Full 6000-6400 series range, 500,000+ units in stock, ships within 24 hours
✅ Custom Solutions - Non-standard sizes, special materials (ceramic, stainless), high/low temperature customization
✅ Technical Support - Senior engineering team provides free selection consultation and failure analysis
✅ Competitive Pricing - Factory direct sales, volume discounts, industry-leading cost-effectiveness
FAQ
Q1: What's the difference between deep groove and angular contact ball bearings?
A: Deep groove bearings have 0° contact angle, primarily for radial loads with limited bidirectional axial capacity. Angular contact bearings feature 15°, 25°, or 40° contact angles designed for high single-direction axial loads, typically used in pairs. Deep groove bearings offer lower cost and higher speeds, making them the universal choice.
Q2: How to extend deep groove ball bearing service life?
A: 1) Avoid long-term operation exceeding 30% of dynamic load rating; 2) Ensure clean installation environment to prevent contamination; 3) Select proper grease and replenish periodically; 4) Control operating temperature within allowable range; 5) Use correct installation tools to avoid impact damage.
Q3: Can sealed bearings operate above 10,000 RPM?
A: 2RS sealed bearings typically have 15-20% lower speed limits than open types due to seal friction. For high-speed operation, recommend Z/ZZ shielded or open bearings with oil lubrication.
Q4: Is bearing heating normal in motors? What temperature is acceptable?
A: Bearing temperature rise is normal. Motor bearing temperature should typically stay within ambient +55°C, maximum 95°C. If exceeded, check lubrication, alignment, load, or clearance selection.
Q5: What's the difference between 6205 and 6305 bearings? How to choose?
A: Both have 25mm bore, but 6305 has 62mm OD and 17mm width, with ~40% higher load capacity than 6205 (52mm OD, 15mm width). Choose 6305 when space allows and loads are higher; select 6205 for space constraints or higher speed requirements.
Get Your Professional Bearing Solution Today
Whether you need standard 6203-2RS motor bearings or specialty VA208 high-temperature bearings, our technical team provides optimal selection recommendations.
Sales Hotline: +86-18615202650
Sales Email: receiving@yokobearings.com