🔥 Hot Stock Alert: Deep Groove Ball Bearings 6205-2RS -- 50,000+ units ready to ship
✅ ISO 9001:2015 Certified · 100% Genuine NTN · Full Traceability
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Dustproof NTN 6310 Deep Groove Ball Bearing 50x110x27mm for Construction Equipment Gearbox thumbnail 1
Dustproof NTN 6310 Deep Groove Ball Bearing 50x110x27mm for Construction Equipment Gearbox - Side View thumbnail 2
Dustproof NTN 6310 Deep Groove Ball Bearing 50x110x27mm for Construction Equipment Gearbox - Detail thumbnail 3
Dustproof NTN 6310 Deep Groove Ball Bearing 50x110x27mm for Construction Equipment Gearbox - Dimension thumbnail 4
NTN GENUINE
IN STOCK
Dustproof NTN 6310 Deep Groove Ball Bearing 50x110x27mm for Construction Equipment Gearbox
Dustproof NTN 6310 Deep Groove Ball Bearing 50x110x27mm for Construction Equipment Gearbox - Side View
Dustproof NTN 6310 Deep Groove Ball Bearing 50x110x27mm for Construction Equipment Gearbox - Detail
Dustproof NTN 6310 Deep Groove Ball Bearing 50x110x27mm for Construction Equipment Gearbox - Dimension
Model
6310
Origin
JAPAN
Lead Time
5-7 DAYS
NTN AUTHORIZED · OEM SUPPLIER

Dustproof NTN 6310 Deep Groove Ball Bearing 50x110x27mm for Construction Equipment Gearbox

MODEL: 6310 100% Genuine · Traceable

Ensure uninterrupted operation of your construction equipment gearbox with the NTN 6310 deep groove ball bearing, engineered to deliver exceptional dust resistance in harsh job site conditions. This 50x110x27mm Japanese-manufactured bearing maintains consistent performance under heavy loads, minimizing unplanned downtime and keeping your machinery running at peak efficiency. Precision-crafted from high-grade bearing steel with grease lubrication for extended service life in gearbox applications Direct from authorized NTN distributor—complete traceability documentation ensures compliance and eliminates counterfeit risks Customizable options available to match specific equipment requirements, backed by 10+ years of technical support expertise

Key Specifications
SPEC-01
Bore (d)
50mm
OD (D)
110mm
Width (B)
27mm
Dyn. Load Cr
183 kN
Stat. Load C0
220 kN
Lim. Speed
3,800 rpm
Request Quotation Now
24H
Quote Reply
5-7D
Sample Ship
100%
Genuine
SECTION 05 / FULL SPECIFICATIONS

Complete Technical Parameters

All specifications strictly follow NTN factory standards. Data verified against original NTN catalogue with full ISO 9001 compliance.

Dimensions DIM
Bore Diameter (d)50 mm
Outer Diameter (D)110 mm
Width (B)27 mm
Chamfer (rs min)2.1 mm
Net Weight1.85 kg
Performance PERF
Dynamic Load Rating (Cr)183 kN
Static Load Rating (C0r)220 kN
Limiting Speed (Grease)3,800 rpm
Limiting Speed (Oil)5,000 rpm
Fatigue Load Limit (Pu)23.6 kN
Construction CONST
Bearing TypeDeep Groove Ball Bearing
Cage MaterialPressed Steel
Sealing TypeOpen / 2RS / ZZ
Internal ClearanceCN / C3 / C4
Tolerance ClassP0 / P6 / P5
Operating Conditions OP
Temperature Range-30°C ~ +120°C
LubricationGrease / Oil
Vibration ClassZ2 / Z3 / Z4
StandardJIS B 1518 / ISO 281
OriginJapan (NTN Factory)
SECTION 06 / INDUSTRY APPLICATIONS

Compatible Equipment & Industries

Validated by 2,400+ OEM customers across 50+ countries. Engineered for high-reliability operation in demanding industrial environments.

01

Steel Mills

Heavy-duty rolling mills, continuous casters, hot strip mills with shock-absorbed design.

02

Mining Equipment

Crushers, vibrating screens, conveyors operating under extreme loads and contamination.

03

Paper Machines

Drying cylinders, calenders, press rolls requiring vibration damping.

04

Conveyor Systems

Belt conveyors, idlers, drive pulleys for ports, logistics and manufacturing lines.

05

Cement & Aggregate

Vibrating equipment, crushers, kilns demanding misalignment tolerance.

06

Wind Power

Main shaft, gearbox, generator bearings for onshore and offshore turbines.

07

Petrochemical

Pumps, compressors, blowers in chemical processing and refining plants.

08

Construction Machinery

Excavators, cranes, loaders, drilling rigs working under impact loads.

09

Marine & Offshore

Propulsion shafts, deck machinery, anti-corrosion sealed for marine environment.

SECTION 07 / ENGINEERING DEEP DIVE

Why NTN Outperforms in Critical Applications

From raceway geometry to surface micro-finish, every parameter is engineered for L10 life extension and consistent batch performance.

MATERIAL

Premium Carburized Steel

High-purity SUJ2 / 100Cr6 bearing steel with vacuum degassing. Carburized case depth precisely controlled at 2.5-3.5mm with HRC 60-62 surface hardness.

  • Oxygen content ≤ 8 ppm -- minimizes inclusion-induced fatigue cracks
  • Compressive residual stress on raceway surface for crack resistance
  • 40% L10 life improvement vs. industry standard steel
SEALING

Multi-Lip NBR / FKM Seals

Choice of contact (2RS), non-contact (2Z) and metal shielded (ZZ) options. Designed for IP65 dust ingress protection and grease retention.

  • NBR rated -40°C ~ +120°C / FKM rated up to +200°C
  • Garter spring tension calibrated for low torque & long sealing life
  • Customizable food-grade FDA compliant variants available
PRECISION

P0 to P5 Tolerance Class

Precision grades from standard P0 up to P5 (ISO Class 5) for high-speed spindle applications. Inspected on Mahr / Talyrond CMM equipment.

  • Bore tolerance ±2μm (P5) / Radial runout ≤ 4μm
  • Raceway roundness controlled within 0.8μm
  • Vibration class Z2/Z3/Z4 for low-noise applications
CLEARANCE

CN / C3 / C4 Internal Clearance

Internal radial clearance optimized per application -- CN for general use, C3 for thermal expansion, C4 for high-temperature environments.

  • Optimized load distribution under interference fits
  • Thermal expansion accommodation up to ΔT 80°C
  • Custom clearance ranges available for OEM specifications
SECTION 08 / TRUST & TRACEABILITY

100% Genuine NTN.
Traceable. Warranted.

We operate as an officially authorized NTN distributor with an unbroken supply chain. Every bearing carries laser-engraved batch codes that can be verified against NTN's factory database.

Authorized Distributor

Direct sourcing from NTN factories with original brand authorization certificate.

Laser Batch Code

Every bearing engraved with traceable batch ID. Verifiable via NTN factory MES system.

Full Documentation

Mill test certificates, COO, COC, packing list -- all export documents provided.

12-Month Warranty

Standard 12-month quality warranty. Free replacement for verified manufacturing defects.

2,400+
OEM Customers
50+
Countries Served
99.97%
QC Pass Rate
10+
Years Experience
SECTION 09 / PACKAGING & SHIPPING

Export-Ready Packaging, Worldwide Door-to-Door Delivery

Real-time WMS inventory ensures rapid dispatch. Standard NTN moisture-proof packaging with anti-rust treatment for long-term storage.

NTN original packaging with moisture protection
PACKAGING

Original NTN Packaging

  • Inner: NTN-printed plastic tube + VCI anti-rust paper
  • Middle: Original NTN branded carton with batch label
  • Outer: Reinforced export carton, optional wooden pallet
  • Custom: Neutral packaging or customer branding available
Global shipping logistics hub
LOGISTICS

Global Shipping Options

EXPRESS
DHL · FedEx · UPS
3-7 days door-to-door
AIR FREIGHT
Bulk Air Cargo
5-10 days port-to-port
SEA FREIGHT
FCL · LCL
15-35 days, lowest cost
RAIL
CN-EU Express
18-22 days to Europe
EXW · FOB · CIF · DDP -- flexible Incoterms supported
SECTION 11 / FAQ

Frequently Asked
Questions

Common questions from OEM and distributor partners. Can't find an answer? Contact our engineering team directly.

Ask a custom question
Q.01 How can I verify the authenticity of NTN bearings I receive?

Every NTN bearing has laser-engraved batch codes on the inner ring. We provide the original mill test certificate and brand authorization letter with each shipment. You can verify the batch code with NTN factory directly via their official channels.

Q.02 What is the typical lead time and minimum order quantity?

In-stock items ship within 5-7 working days. MOQ starts from 1 piece for samples. Bulk orders for OEM customers benefit from priority production scheduling and consolidated shipping. Custom non-standard bearings typically take 30-45 days.

Q.03 Do you offer OEM customization (clearance, sealing, precision)?

Yes. We support custom internal clearance (CN/C3/C4/C5), sealing options (2RS/ZZ/Open), precision class (P0/P6/P5), special grease, and neutral packaging. Submit your engineering drawing and we will return a feasibility report within 72 hours.

Q.04 What documentation is provided for international shipping?

Standard export documents include: Commercial Invoice, Packing List, Bill of Lading / Air Waybill, Certificate of Origin (Form A / E / FTA), Certificate of Conformity, NTN Mill Test Certificate, and Brand Authorization Letter. Customs HS code and country-specific requirements are pre-checked.

Q.05 What is your warranty and return policy?

We offer a standard 12-month quality warranty from shipping date for verified manufacturing defects. Defective products are replaced free of charge. Failure analysis reports are provided to support root cause investigation. Wear due to misapplication or improper installation is excluded.

Q.06 Can you ship under DDP terms to my country?

Yes. We support EXW, FOB, CIF, CFR, and DDP terms. Our logistics team handles customs clearance, duties, and last-mile delivery for DDP shipments to 50+ countries. For sensitive markets, we recommend DDP to avoid customs delays.

PRODUCT DESCRIPTION

Detailed Product Information

Ensure uninterrupted operation of your construction equipment gearbox with the NTN 6310 deep groove ball bearing, engineered to deliver exceptional dust resistance in harsh job site conditions. This 50x110x27mm Japanese-manufactured bearing maintains consistent performance under heavy loads, minimizing unplanned downtime and keeping your machinery running at peak efficiency.

  • Precision-crafted from high-grade bearing steel with grease lubrication for extended service life in gearbox applications
  • Direct from authorized NTN distributor—complete traceability documentation ensures compliance and eliminates counterfeit risks
  • Customizable options available to match specific equipment requirements, backed by 10+ years of technical support expertise

Description

Product Specifications

Parameter Details
Model NO. 6310
Type Deep Groove Ball Bearing
Bore Diameter (d) 50mm
Outside Diameter (D) 110mm
Width (B) 27mm
Material Bearing Steel
Seal Type Dustproof
Lubrication Grease or Oil
Trademark NTN
Origin Japan
HS Code 8482300000

Application Industries

Industry Typical Equipment
Construction Excavators, Loaders, Bulldozers, Gearboxes
Automotive Transmissions, Fans, Motors
General Machinery Industrial Gearboxes, Pumps, Conveyors

Stop Construction Delays with Reliable NTN 6310 Deep Groove Ball Bearings

Construction equipment gearboxes face relentless dust, vibration, and heavy loads—yet many operations still rely on uncertain bearing sources. Counterfeit bearings often fail prematurely, causing unexpected downtime that costs $2,000–$5,000 per hour in lost productivity. Multi-tier distribution channels stretch delivery times by 30–50%, leaving maintenance teams waiting while machines sit idle.

Genuine NTN 6310 Bearings: In Stock and Ready for Your Gearbox

As an official NTN distributor, we offer the dustproof NTN 6310 deep groove ball bearing (50x110x27mm) with full traceability and immediate availability. This bearing combines Japanese precision with a dustproof seal design, making it ideal for construction equipment gearboxes where contamination control is critical. Our WMS system tracks real-time inventory, ensuring we can fulfill orders for both emergency repairs and bulk production needs without delay.

Engineered for Construction Gearbox Challenges

The NTN 6310 bearing thrives in the harsh conditions of construction machinery. Its deep groove design accommodates radial and axial loads simultaneously, while the dustproof seal prevents abrasive particles from entering—extending service life by up to 40% compared to standard bearings in dusty environments. Whether powering an excavator’s swing gearbox or a loader’s transmission, this bearing maintains consistent performance under high torque and variable speed operations.

Technical Details That Maximize Gearbox Performance

The 50x110x27mm dimensions of the NTN 6310 bearing ensure precise fit in standard construction gearboxes, eliminating the need for custom modifications. Crafted from high-grade bearing steel, it delivers exceptional hardness and wear resistance—critical for withstanding the shock loads common in off-road applications. The grease or oil lubrication flexibility allows adaptation to specific operating temperatures, while the bearing’s structural integrity ensures reliable power transmission even in continuous-duty cycles.

Why Genuine NTN Bearings Reduce Total Cost of Ownership

Choosing authentic NTN 6310 bearings over gray-market alternatives lowers long-term costs. Counterfeit bearings typically fail within 3–6 months, requiring repeat replacements and unplanned maintenance. In contrast, genuine NTN bearings offer predictable service life, reducing downtime and labor expenses. Our ISO 9001 compliant three-level inspection ensures each bearing meets OEM standards, eliminating the risk of premature failure that could damage expensive gearbox components.

Your Trusted Partner for Construction Bearings

With 10+ years serving the construction industry across 50+ countries, we bring proven expertise to every order. As an official NTN distributor, each bearing comes with complete traceability documentation, including batch codes and origin certificates. Our technical team provides free model selection support, ensuring you get the right bearing for your gearbox specifications. We maintain dedicated inventory for high-demand models like the 6310, offering global door-to-door logistics with real-time tracking.

Packaging & Shipping

  • Original NTN packaging with individual box protection and anti-counterfeit labels
  • Outer carton and pallet加固 for secure transportation
  • Package size: 7.00cm * 13.00cm * 5.00cm
  • Package gross weight: 1.100kg
  • 3–7 business days delivery for in-stock orders
  • Flexible shipping via DHL, FedEx, UPS, air, or sea freight
  • 1 piece minimum order quantity supported

Get Your NTN 6310 Bearing Today

Don’t let bearing issues halt your construction projects. Send us your gearbox model, required quantity, and delivery location—our team will provide a formal quotation with traceability certificates within 24 hours. With our stock availability, you can minimize downtime and keep your equipment operating at peak efficiency.

Frequently Asked Questions

Q: Are these genuine NTN bearings?

A: Yes, we are an official NTN authorized distributor. Every NTN 6310 bearing comes with complete traceability documentation and brand authorization certificates.

Q: How do I confirm if this bearing fits my gearbox?

A: Provide your equipment model or gearbox specifications, and our technical team will verify compatibility with the 50x110x27mm NTN 6310 bearing at no cost.

Q: What is your warranty policy?

A: All bearings come with NTN’s original manufacturer warranty. We offer unconditional replacement for any manufacturing defects.

Q: What is the minimum order quantity?

A: We accept orders starting from 1 piece, supporting both emergency repairs and bulk purchases.

Q: How long does shipping take?

A: In-stock NTN 6310 bearings are delivered within 3–7 business days via your preferred logistics method (DHL, FedEx, UPS, air, or sea freight).

Q: How can I verify the bearing’s authenticity?

A: Each bearing includes NTN’s original packaging with anti-counterfeit labels. We also provide full traceability documents and can assist with verification through NTN’s official channels.

Ready to order or need a quote?
Send your bearing designation, application details, and quantity — we’ll respond within 24 hours.

SECTION 12 / GET QUOTATION

Ready to Order
6310?

Submit your inquiry below. Our senior application engineers will respond within 24 hours with a formal quotation, brand authorization, and traceability certificate.

  • Formal quotation in 24h
  • Sample within 5-7 days
  • 100% genuine guarantee
  • Worldwide DDP shipping
FORM · INQUIRY-6310 SECURE SSL

By submitting, you agree to NTN OEM processing your contact details for quotation purposes only. We never share information with third parties.

NTN AUTHORIZED DISTRIBUTOR / OEM · Wholesale · Global Logistics
ISO 9001:2015 · JIS B 1518