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NTN GENUINE
IN STOCK
<p> Rodamiento de Bolas de Surco Profundo 6306 30x72x19mm para Bomba Centrífuga con Larga Vida útil
<p> Rodamiento de Bolas de Surco Profundo 6306 30x72x19mm para Bomba Centrífuga con Larga Vida útil - Side View
<p> Rodamiento de Bolas de Surco Profundo 6306 30x72x19mm para Bomba Centrífuga con Larga Vida útil - Detail
<p> Rodamiento de Bolas de Surco Profundo 6306 30x72x19mm para Bomba Centrífuga con Larga Vida útil - Dimension
Model
6306
Origin
JAPAN
Lead Time
5-7 DAYS
NTN AUTHORIZED · OEM SUPPLIER

<p> Rodamiento de Bolas de Surco Profundo 6306 30x72x19mm para Bomba Centrífuga con Larga Vida útil

MODEL: 6306 100% Genuine · Traceable

Ensure your centrifugal pump runs with uninterrupted precision using the NTN 6306 deep groove ball bearing—engineered to deliver extended service life in demanding fluid handling applications. This 30x72x19mm bearing features high-grade bearing steel construction and optimized grease lubrication, directly addressing the critical need for reliable, traceable components that align with strict production schedules.Precision dimensions (30mm ID × 72mm OD × 19mm width) ensure perfect fit for pump shafts, reducing vibration and wearJapanese NTN authentic quality with full traceability documentation, eliminating compliance risks in global supply chainsSupports OEM customization and small-batch trials, backed by our 10+ years technical team for选型 guidance

Key Specifications
SPEC-01
Bore (d)
30mm
OD (D)
72mm
Width (B)
19mm
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)30 mm
Outer Diameter (D)72 mm
Width (B)19 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 your centrifugal pump runs with uninterrupted precision using the NTN 6306 deep groove ball bearing—engineered to deliver extended service life in demanding fluid handling applications. This 30x72x19mm bearing features high-grade bearing steel construction and optimized grease lubrication, directly addressing the critical need for reliable, traceable components that align with strict production schedules.

  • Precision dimensions (30mm ID × 72mm OD × 19mm width) ensure perfect fit for pump shafts, reducing vibration and wear
  • Japanese NTN authentic quality with full traceability documentation, eliminating compliance risks in global supply chains
  • Supports OEM customization and small-batch trials, backed by our 10+ years technical team for选型 guidance

Description

Especificaciones del Producto

Parámetro

Detalles

Modelo NO.

6306

Material

Acero para rodamientos

Especificación

30×72×19mm

Lubricación

Grasa o Aceite

Marca registrada

Origen

Japón

Código HS

8482300000

Muestra

Disponible

Personalizado

Personalizable

Servicio

OEM ODM

NTN

Industrias de Aplicación

Industria

Equipo Típico

Maquinaria General

Bombas centrífugas, ventiladores, cajas de engranajes

Automotriz

Componentes de Automóviles, Bombas de Agua

{{ZKF_0}}Fabricación Industrial{{ZKF_1}}

Conjuntos de Motores, Sistemas de Manejo de Fluidos

Prevenga fallos en las bombas con el auténtico

    6306 Rodamiento de Bolas de Surco Profundo

    Centrifugal pump operators know the frustration of unexpected downtime—often caused by counterfeit bearings that fail prematurely. When a bearing seizes at 3 AM, the cost goes beyond replacement parts: production halts, maintenance crews work overtime, and deadlines slip. Multi-tier distributors compound the problem with 30–50% longer lead times, forcing you to stockpile expensive inventory “just in case.”

    Rodamiento

      6306 Original: En Stock y Rastreable

      Como distribuidor oficial de

        , eliminamos estos dolores de cabeza al suministrar el rodamiento de bolas de ranura profunda 6306
      • directamente de canales autorizados. Nuestro sistema WMS rastrea el inventario en tiempo real, por lo que el rodamiento de 30x72x19mm que necesita para su bomba centrífuga está listo para enviar. Cada unidad viene con documentación de trazabilidad completa, asegurando el cumplimiento con las aduanas de exportación y auditorías de calidad—sin más riesgos de mercado gris.

        Diseñado para el rendimiento de bombas centrífugas

        El rodamiento

          6306 prospera en las condiciones exigentes de las bombas centrífugas, donde las cargas radiales y las fuerzas axiales moderadas se combinan con la rotación continua. Su diámetro de orificio de 30 mm y diámetro exterior de 72 mm equilibran la estabilidad estructural con una transmisión de potencia eficiente, mientras que el ancho de 19 mm proporciona una distribución óptima de la carga. Ya sea manejando agua, productos químicos o fluidos industriales, este rodamiento mantiene un rendimiento constante en temperaturas que oscilan entre -40 °C y 120 °C.

          Características técnicas que maximizan la vida de la bomba

          Crafted from high-grade bearing steel, the NTN 6306 offers exceptional durability—critical for pumps operating 24/7. The deep groove design minimizes friction by evenly distributing stress across the raceways, reducing heat buildup and extending service intervals. Choose between grease or oil lubrication to match your pump’s operating parameters: grease for maintenance-free operation, oil for high-speed applications exceeding 6,000 r/min. Precision manufacturing ensures tight tolerances, preventing vibration-induced wear on pump shafts and housings.

          Por qué el

            genuino supera a las alternativas falsificadas

            Los rodamientos 6306 falsificados pueden costar un 30% menos por adelantado, pero típicamente fallan dentro de 3 a 6 meses, en comparación con 2 a 3 años para las unidades genuinas

              . Una sola avería de bomba debido a un rodamiento falso puede costar más de $5,000 en tiempo de inactividad y reparaciones, eclipsando los ahorros iniciales. Nuestro sistema de inspección de tres niveles ISO 9001 verifica cada rodamiento antes del envío, comprobando defectos de material, precisión dimensional y suavidad de rotación. Respaldamos el
            • 6306 con garantías respaldadas por el fabricante, para que evite disputas de responsabilidad por piezas de calidad inferior.

              Por qué los compradores globales eligen nuestros rodamientos

                With 10+ years as an NTN authorized distributor, we serve clients in 50+ countries across Southeast Asia, Europe, and North America. Our technical team provides free application analysis—helping you confirm the 6306 is the right fit for your pump’s flow rate, pressure, and fluid type. We offer flexible OEM customization, from laser marking to specialized packaging, and arrange door-to-door logistics via DHL, FedEx, or sea freight. For urgent repairs, small-batch orders ship within 24 hours; bulk OEM orders include dedicated inventory reservation to align with your production schedule.

                Packaging & Shipping

                  Original embalaje con etiquetas anticopia y documentación de trazabilidad de lote

                  Embalaje en cartón y paletas para un tránsito seguro, con un peso bruto por unidad: 0.400kg

                  Entrega exprés (3–7 días) o opciones económicas de transporte marítimo

                  Seguimiento en tiempo real proporcionado para todos los envíos

                  Cantidad mínima de pedido: 1 unidad para reparaciones de emergencia, precios al por mayor disponibles para pedidos OEM

                Obtenga su rodamiento 6306

                enviado hoy

                  No dejes que el tiempo de inactividad de la bomba afecte tus ganancias. Envíanos los detalles de tu pedido: modelo de rodamiento 6306, cantidad y notas de aplicación, y nuestro equipo emitirá una cotización formal con certificados de autorización en un plazo de 24 horas. Apoyamos las pruebas de muestra para verificar el rendimiento antes del despliegue a gran escala, asegurando que el rodamiento cumpla con los requisitos exactos de tu bomba centrífuga.

                  Preguntas Frecuentes

                  Q: ¿Son estos rodamientos genuinos?

                  A: Sí, somos un distribuidor oficial de

                    . Cada rodamiento 6306 viene con documentación de trazabilidad completa y certificados de autorización de marca.

                  P: ¿Cómo confirmo que el 6306 se ajusta a mi bomba centrífuga?

                  A: Proporcione el modelo de su bomba, la velocidad de operación y las condiciones de carga. Nuestro equipo técnico verificará la compatibilidad basada en los datos de ingeniería

                    .

                  P: ¿Cuál es su política de garantía?

                  A: We honor NTN’s official warranty, covering manufacturing defects with free replacement or refund.

                  Q: ¿Cuál es la cantidad mínima de pedido?

                  A: 1 unidad para reparaciones de emergencia; se aplican descuentos por volumen a pedidos de más de 100 unidades.

                  Q: ¿Cuánto tiempo tarda el envío a Europa?

                  A: La entrega exprés tarda de 3 a 5 días; hay opciones de flete marítimo disponibles para pedidos al por mayor (3 a 4 semanas).

                  Q: ¿Cómo puedo verificar la autenticidad de los rodamientos?

                  A: Each bearing includes NTN’s holographic label and batch code, verifiable through NTN’s official database. We provide full traceability reports upon request.

                  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
6306?

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-6306 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