<p> Rolamento Autocompensador de Rolos 21307 35x80x21mm para Caixa de Engrenagens de Alta Velocidade em Estoque Entrega Rápida
MODEL: 21307100% Genuine · Traceable
Ensure your gearbox operates at peak efficiency with the NTN Spherical Roller Bearing 21307, engineered for high-speed performance and reliable power transmission. This 35x80x21mm precision component delivers long life and low noise, making it ideal for automotive and industrial gearbox applications where downtime is costly.ISO 9001-certified quality with full traceability documentation for seamless complianceIn-stock availability ensures fast delivery to keep your production schedule on trackSpherical roller design accommodates misalignment, reducing wear and extending equipment lifespanBacked by Dunyu Bearings' 10+ years of technical expertise, this genuine NTN bearing comes with the support you need to optimize installation and minimize maintenance risks. Customizable options available to match your specific operational requirements.
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.
Q.01How 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.02What 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.03Do 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.04What 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.05What 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.06Can 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 gearbox operates at peak efficiency with the NTN Spherical Roller Bearing 21307, engineered for high-speed performance and reliable power transmission. This 35x80x21mm precision component delivers long life and low noise, making it ideal for automotive and industrial gearbox applications where downtime is costly.
ISO 9001-certified quality with full traceability documentation for seamless compliance
In-stock availability ensures fast delivery to keep your production schedule on track
Backed by Dunyu Bearings’ 10+ years of technical expertise, this genuine NTN bearing comes with the support you need to optimize installation and minimize maintenance risks. Customizable options available to match your specific operational requirements.
Evite o Tempo de Inatividade da Caixa de Engrenagens com Rolamentos Autênticos
21307 de Rolos Esféricos
Fabricantes OEM conhecem o custo de uma falha inesperada na caixa de engrenagens—horas de produção perdidas, equipes de manutenção em desespero e prazos de entrega perdidos. Rolamentos do mercado cinza frequentemente falham prematuramente devido a materiais de baixa qualidade, enquanto distribuidores de múltiplos níveis estendem os prazos de entrega em 30–50%, deixando sua linha de produção parada quando você mais precisa das peças.
Genuíno
21307 Rolamentos Em Estoque para Envio Imediato
Como distribuidor oficial da
, eliminamos esses pontos de dor com nosso sistema de inventário em tempo real WMS. O Rolamento de Rolo Esférico
21307 (35x80x21mm) está disponível agora—sem espera por remessas do exterior ou processamento em lote. Projetado para aplicações em caixas de engrenagens de alta velocidade, este rolamento oferece a confiabilidade que seu cronograma de produção exige, apoiado pelo nosso processo de inspeção de qualidade de três níveis ISO 9001.
Projetado para desempenho de caixa de engrenagens de alta velocidade
O Rolamento de Rolos Esféricos 21307 se destaca em ambientes exigentes onde cargas radiais e altas velocidades de rotação são constantes. Seu design esférico acomoda desalinhamentos, reduzindo o estresse nos eixos do redutor e prolongando a vida útil. Seja em transmissões automotivas ou maquinário industrial, este rolamento mantém operação estável mesmo sob condições variáveis de carga, tornando-se um componente crítico para minimizar paradas não programadas.
Vantagens Técnicas Que Importam
Three key features define the NTN 21307’s performance: its 35mm bore diameter and 80mm outside diameter balance load capacity with compact gearbox integration; the 21mm width provides optimal support for high-torque applications; and the low-noise design ensures compliance with industrial sound regulations. The bearing’s long-life construction reduces replacement frequency, directly lowering your total maintenance costs. Each unit undergoes rigorous testing to meet NTN’s strict quality standards, ensuring consistent performance across every batch.
O Custo Oculto de Rolamentos de Caixa de Câmbio Falsificados
Escolher rolamentos não autorizados para sua caixa de engrenagens pode parecer econômico inicialmente, mas os riscos são substanciais. Produtos falsificados geralmente carecem de tratamento térmico adequado, levando a desgaste prematuro e possível falha catastrófica. Uma única quebra de caixa de engrenagens pode custar milhares em taxas de reparo e perda de produção — superando em muito a economia de alternativas mais baratas. Nossos rolamentos
21307 vêm com documentação completa de rastreabilidade, garantindo conformidade com desembaraço aduaneiro e eliminando disputas de responsabilidade de peças não certificadas.
Por que fabricantes globais confiam em nosso
fornecimento
With over 10 years serving 50+ countries, we’ve built our reputation on four pillars: official NTN authorization guarantees 100% genuine products with complete traceability; our technical team provides application-specific guidance, from model selection to installation support; dedicated account managers track every order from warehouse to delivery; and flexible OEM customization meets your unique gearbox requirements. We maintain stock levels to support both emergency repairs and long-term production runs, ensuring you never face unnecessary delays.
Packaging & Shipping
Embalagem original
com certificação do produto e documentação de rastreabilidade
Embalagem em palete de papelão para transporte e armazenamento seguros
Processamento no mesmo dia para pedidos em estoque
Logística global porta a porta via DHL, FedEx ou opções de frete marítimo
Rastreamento em tempo real fornecido para todas as remessas
Quantidade mínima do pedido: 1 unidade para necessidades de emergência
Obtenha Seu Rolamento
21307 Enviado Hoje
Don’t let gearbox downtime disrupt your production schedule. The NTN 21307 Spherical Roller Bearing is in stock and ready to ship—send your order details now and get back to full operation faster. Our team will confirm availability, provide a formal quotation within 24 hours, and arrange delivery that aligns with your timeline.
Perguntas Frequentes
Q: Estes são rolamentos genuínos ?
R: Sim, somos um distribuidor autorizado oficial da
. Cada rolamento vem com documentação completa de rastreabilidade e certificados de autorização da marca.
Q: Como confirmo se o 21307 é compatível com minha caixa de câmbio?
A: Forneça o modelo do seu redutor ou os parâmetros operacionais (carga, velocidade, temperatura), e nossa equipe técnica verificará a compatibilidade sem custos.
P: Qual é a sua política de garantia?
A: All NTN bearings are covered by the manufacturer’s warranty. We replace or refund any units with manufacturing defects.
P: Qual é a quantidade mínima do pedido?
A: Nós aceitamos pedidos para 1 unidade, suportando tanto reparos de emergência quanto requisitos de pequenos lotes.
P: Com que rapidez vocês podem enviar?
A: Rolamentos em estoque são processados em até 24 horas, com prazos de entrega variando de 3–7 dias úteis dependendo da localização.
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 for verification.
Ready to order or need a quote?
Send your bearing designation, application details, and quantity — we’ll respond within 24 hours.
Submit your inquiry below. Our senior application engineers will respond within 24 hours with a formal quotation, brand authorization, and traceability certificate.
