6311 Deep Groove Ball Bearing: Your Reliable Solution for High-Performance Applications
If you're sourcing the 6311 bearing, you're likely looking for a standard, high-capacity radial ball bearing that offers durability and value for OEM manufacturing, maintenance, or resale. This page provides a complete technical and commercial guide to the 6311, including its specifications, common application scenarios, and how partnering with a specialized manufacturer like Hebei Yuanda Trade Co., Ltd. can ensure you receive bearings that meet precise quality standards, backed by full OEM/ODM support and reliable high-speed delivery from China's integrated supply chain.
Common Challenges in Sourcing Industrial Bearings Like the 6311
Procurement managers and brand owners face specific hurdles when sourcing critical components like the 6311 deep groove ball bearing:
- Inconsistent Quality: Variations in material purity, heat treatment, and tolerances can lead to premature failure, causing costly downtime.
- Long, Unpredictable Lead Times: Disruptions in the supply chain delay production schedules and inventory planning.
- Limited Customization Support: Many suppliers offer only standard catalog items, lacking the flexibility for custom seals, lubrication, or markings required for branded products.
- Compliance and Documentation Gaps: Navigating the required certifications (CE, ISO) for different markets can be complex, and suppliers sometimes provide incomplete documentation.
- Hidden Costs: Issues with packaging, logistics, and after-sales support can inflate the total cost of ownership beyond the initial unit price.
The 6311 Bearing: Technical Specifications and Performance Data
The 6311 is a versatile, medium-duty bearing designed for radial loads with moderate axial load capacity. Here are its standard dimensions and key performance indicators.
| Parameter | Metric (mm) | Inch (approx.) | Notes |
|---|---|---|---|
| Bore Diameter (d) | 55 mm | 2.1654 in | Standard ABEC-1/P0 tolerance available. |
| Outer Diameter (D) | 120 mm | 4.7244 in | Machined to precise roundness specifications. |
| Width (B) | 29 mm | 1.1417 in | Consistent width ensures proper fit in housings. |
| Dynamic Load Rating (Cr) | 92.2 kN | 20,700 lbf | Basic load rating for life calculation. Please refer to the actual order confirmation for specific grade data. |
49-16-2794 32448-95a 6755 part number specifications
Typical Application Scenarios for the 6311 Bearing
This bearing's balance of size, capacity, and speed makes it suitable for various industrial machinery:
- Electric Motors & Gearboxes: A common choice for shaft support in industrial motors and speed reducers.
- Material Handling Equipment: Used in conveyor rollers, pulley systems, and light-duty industrial fans.
- Agricultural Machinery: Fits applications in pumps, augers, and drivetrains where moderate loads are present.
- General Industrial Machinery: A reliable component for pumps, compressors, and machine tool spindles (depending on precision grade).
Our Manufacturing Advantage: Precision, Control, and Flexibility
Hebei Yuanda Trade Co., Ltd. (YD), founded in 2006, leverages its deep network within North China's foundry and machining ecosystem to provide controlled, quality-centric production of components like the 6311 bearing.
1. Integrated Quality Assurance Protocol
Our process ensures every batch meets stringent standards:
- Material Traceability: Use of certified bearing steel (e.g., SAE 52100 equivalent) from audited mills.
- In-Process Inspection: Dimensional checks, hardness testing, and roundness analysis at critical production stages.
- Final Validation: 100% visual inspection, noise testing, and sample-based rigorous life testing on simulators.
- Compliance Documentation: We can supply bearings that comply with ISO 9001:2015 quality management standards. Products can be manufactured to meet CE marking requirements for the European market. Other certifications like RoHS are available upon request.
Disclaimer: Specific certification compliance must be confirmed prior to order placement and will be detailed in the formal commercial invoice and packing list.
2. Full OEM & ODM Customization Capability
Beyond the standard open 6311, we offer tailored solutions:
- Shield & Seal Options: ZZ (metal shield), 2RS (rubber seal), or custom configurations.
- Lubrication: Standard grease, food-grade lubricant, or high-temperature alternatives.
- Tolerances & Precision: From standard ABEC-1/P0 to higher precision grades for specialized applications.
- Branding: Custom laser etching or packaging for your brand.
3. Transparent Commercial Terms for B2B Buyers
We structure orders for clarity and efficiency:
- MOQ (Minimum Order Quantity): Flexible, starting from 100 pieces for standard 6311 bearings. Lower MOQs may be considered for sample or trial orders.
- Lead Time: Standard products: 25-35 days. Customized orders: 35-45 days. Expedited options are available.
- Packaging: Standard industrial packaging (plastic bag + single box + master carton). Custom export-grade packaging with anti-rust paper and vacuum sealing is available.
- Logistics & Payment: Standard terms are FOB Tianjin/Xingang. CIF/CIP to major global ports can be arranged. Payment methods include T/T (30% deposit, balance before shipment) or L/C at sight.
- After-Sales: Comprehensive product documentation and technical data sheets provided. Warranty against manufacturing defects.
Trust Endorsements: What Our Partners Say
"We've been sourcing 6311 and 6309 bearings from YD for our conveyor roller assemblies for three years. The consistency is key for us – we've had zero quality rejections at our receiving warehouse. Their technical team also helped us specify a custom seal for a dusty environment, which solved a recurring failure issue."
- Michael R., Procurement Director, Midwest Industrial Supply (USA)
"As a small brand owner, finding a supplier willing to do low-MOQ custom runs with my logo was tough. YD delivered. The lead time was as promised, and the bearings performed perfectly in our specialty agricultural pump. They treat small-volume orders with the same professionalism as large ones."
- Sarah L., Owner, TerraFlow Equipment (Canada)
"Our experience as a sourcing agent involves managing risk for clients. YD's clear communication, provision of mill certificates, and ISO audit report gave us and our European client the confidence to proceed. The shipment arrived without any customs documentation issues."
- David Chen, Senior Sourcing Agent, Global Parts Network
Your Next Step: Request a Technical and Commercial Proposal
To evaluate the 6311 deep groove ball bearing for your application, we recommend the following action:
- Submit Your Inquiry: Contact us via email or the form below with your required quantity, any customization needs (seals, lubrication, tolerance), and target destination port.
- Receive Your Proposal: We will provide a detailed quotation, including unit price (FOB/CIF), lead time, payment terms, and a specification sheet.
- Request Samples: We can arrange production samples for your quality validation before proceeding with a full order.
Ready to Secure a Reliable Supply of 6311 Bearings?
Contact our bearing specialists Ben or Linda today for a competitive quote and expert technical consultation.
Tel: +86-311-808-126-83 | WhatsApp: +8619333738338 (Ben) / +8619333736198 (Linda)
Email: info@ydcastings.com
Or visit our Contact Page to send a direct inquiry.
Frequently Asked Questions (FAQ) About the 6311 Bearing
Q1: What is the difference between a 6311 bearing and a 6311-2RS bearing?
A: The standard "6311" is typically an open bearing or one with metal shields (ZZ). "6311-2RS" specifies a bearing with rubber contact seals on both sides, offering better protection against dust and moisture but with slightly higher friction and lower maximum speed.
Q2: What is the standard radial clearance for a 6311 bearing?
A: The most common standard radial clearance group for a deep groove ball bearing like the 6311 is CN (Normal). For exact clearance values (C0, C2, C3, C4, C5) suitable for your specific application (e.g., high-speed vs. high-temp), please consult with our engineers during the inquiry process.
Q3: Can you provide 6311 bearings made from stainless steel?
A: Yes. While the most common material is chrome steel (SAE 52100), we can source and manufacture 6311 bearings from AISI 440C or other stainless grades for corrosion-resistant applications. This will affect the load rating and price.
Q4: How do you ensure bearing quality matches your specifications?
A: We employ a multi-stage quality control system, from material certification to final performance checks. We are also happy to provide Inspection Test Certificates (like ISO 10478-2) or arrange for third-party inspection (SGS, BV, etc.) at the factory before shipment at the buyer's cost.
Q5: What is the typical packaging for export?
A: Standard export packaging involves individually wrapping each bearing in anti-rust paper, placing it in an individual box, then packing multiples in a master carton with proper labeling. For sea freight, cartons are palletized and shrink-wrapped.
About the Author
James Foster is a mechanical engineering consultant with over 15 years of experience in rotating equipment and component sourcing for North American industrial distributors. He has worked extensively with global supply chains to qualify and audit manufacturers, focusing on bearing technology, failure analysis, and total cost of ownership optimization. The insights in this article are based on industry best practices and technical data.
Company Info: Hebei Yuanda Trade Co., Ltd. | Founded: 2006 | Operational Area: 5000 m² | Specialization: Custom Metal Castings & Precision Machined Components, including Bearings.
Address: No.563 Xinhua Road, Shijiazhuang City, Hebei Province, P.R. China.
Note: All technical data, load ratings, lead times, and certification claims are for informational purposes. Final specifications and commercial terms are subject to the official quotation and order confirmation issued by Hebei Yuanda Trade Co., Ltd.
