Cylindrical Roller Bearing
ISO 9001 Certified
TS 16949
Genuine SKF
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Cylindrical Roller Bearing
NSK Cylindrical Roller Bearing NJ420em NJ421em NJ422em
Ensure smooth, reliable rotation in your industrial machinery with this high-performance NSK Cylindrical Roller Bearing set, featuring NJ420em, NJ421em, and NJ422em variants. Designed to minimize downtime and extend equipment lifespan, these bearings deliver exceptional load capacity and precision for heavy-duty applications.
- Engineered with EM-type brass cages for enhanced heat dissipation and reduced friction, ensuring consistent performance even under extreme operating conditions
- Precision-ground raceways and rollers provide stable operation, reducing vibration and noise to keep your machinery running efficiently
7
Day Prototype
vs. 8-12 wks standard
50+
Countries Served
Global logistics network
12h
Quote Response
Expert engineers on call
Typical Applications
Wind Power
Mining
Steel & Metallurgy
Automotive / EV
Rail Transit
Precision Machinery
Genuine SKF Bearings
NDA Protected
Free Sample for Orders > $50K
Global Shipping
Product Details
Especificaciones del Producto
Parámetro
Detalles
Idoneidad de la Aplicación
Industria
Aplicaciones Típicas
Maquinaria de Construcción
Puntos de pivote de cilindros hidráulicos, ensamblajes de cajas de cambios
Maquinaria Industrial
Automotriz
Componentes de transmisión, sistemas de ejes
Equipos de laminación, máquinas de colada continua
Choosing the right cylindrical roller bearing often means the difference between smooth operation and unexpected downtime. Many buyers struggle with mismatched dimensions when replacing worn bearings, or face delays waiting for specific models from limited suppliers.劣质轴承材质硬度/精度不达标,导致早期磨损、异响、设备振动,这不仅 increases maintenance costs but also risks damaging expensive machinery. Construido para un Rendimiento de Alta Resistencia en Aplicaciones Críticas
Our NSK NJ420em, NJ421em, and NJ422em cylindrical roller bearings address these challenges through precise manufacturing and comprehensive supply capabilities. As a专业轴承供应商, we maintain ISO 9001 certified quality control processes from raw material inspection to final dimension testing, ensuring each bearing meets international standards for cylindrical roller bearing performance. With extensive现货库存 across全系列 products, we can fulfill orders with low minimum quantities, supporting both urgent replacements and planned maintenance schedules. Optimizado para aplicaciones de alta carga radial These cylindrical roller bearings excel in applications with heavy radial loads and moderate speeds, such as gearboxes, electric motors, and industrial pumps. The NJ design features a single rib on the outer ring and two ribs on the inner ring, allowing axial displacement of the shaft relative to the housing—ideal for thermal expansion scenarios in steel mills or engine compartments. Their robust construction handles dynamic forces efficiently, making them suitable for continuous operation in矿山 and工程机械 environments where reliability is non-negotiable. Características clave de ingeniería que impactan en el rendimiento
The precision class of these bearings ensures tight dimensional tolerances, critical for interchangeability when replacing existing components. Surface hardness, achieved through controlled heat treatment, directly influences wear resistance and fatigue life—properties that prevent premature failure in high-stress applications. The roller and raceway geometry is optimized to distribute load evenly, reducing stress concentrations that cause spalling or pitting. Additionally, the cage design maintains proper roller spacing, minimizing friction and heat generation during operation, which is essential for maintaining efficiency in hydraulic systems and automation equipment. Por qué la selección adecuada de rodamientos reduce el costo total
Selecting the correct cylindrical roller bearing goes beyond initial price—it affects long-term operational costs. A bearing with inadequate load capacity may fail prematurely, leading to production downtime, repair expenses, and potential damage to adjacent machinery. Following ISO 281 guidelines for bearing life calculation helps ensure the NJ420em, NJ421em, and NJ422em series meet your application’s lifespan requirements. By choosing bearings that match your equipment’s radial load, speed, and temperature conditions, you reduce maintenance frequency and extend service intervals, ultimately lowering the total cost of ownership. Aseguramiento de Calidad en el que Puede Confiar
Our commitment to quality starts with rigorous incoming material testing, including chemical composition and mechanical property verification. Each finished bearing undergoes dimensional inspection using precision measuring tools, hardness testing to ensure material integrity, and surface finish analysis to prevent premature wear. We provide a standard质保期 against manufacturing defects, with clear processes for replacement or refund if issues arise. As a supplier with access to both自有品牌 and国际主流品牌 products, we can source bearings according to your exact specifications, ensuring compatibility with existing equipment and adherence to original design standards. Disponible en stock para envío inmediato
Opciones de envío flexibles: mensajería exprés, transporte aéreo o transporte marítimo
Obtenga su cotización de rodamientos de rodillos cilíndricos hoy
Whether you need NSK NJ420em, NJ421em, NJ422em, or any other cylindrical roller bearing model, we can provide competitive pricing and fast delivery. Simply share your required model number, dimensions (bore diameter, outside diameter, width), and quantity, and our technical team will confirm availability and specifications. The sooner you inquiry, the sooner we can arrange shipment to keep your equipment running. Preguntas Frecuentes
Q: ¿Suministran rodamientos de otras marcas además de ?
A: Yes, we offer a comprehensive range of bearings including international brands like SKF, NTN, Koyo, and domestic Chinese brands. We can source any brand or model specified by the customer. Q: How can I verify if the NJ420em/NJ421em/NJ422em is compatible with my equipment? A: Provide your equipment model or the bearing’s critical dimensions (d x D x B), and our engineering team will cross-reference with manufacturer specifications to confirm compatibility. Q: ¿Cuál es su política de garantía para estos rodamientos de rodillos cilíndricos?
A: We provide a warranty against manufacturing defects. The specific duration and terms are outlined in each sales contract, with replacement or refund options for verified quality issues. Q: ¿Cuál es la cantidad mínima de pedido para estos rodamientos ?
A: Apoyamos cantidades mínimas de pedido bajas, incluyendo compras de una sola unidad para reparaciones de emergencia, con descuentos por volumen disponibles para pedidos más grandes.
Q: How quickly can you ship the NJ420em/NJ421em/NJ422em bearings? A: Stock items are shipped within 1-2 business days. For non-stock models, lead times vary by brand and availability, which we will confirm during the quoting process. Q: ¿Ofrecen soluciones de rodamientos personalizadas (OEM/ODM)?
A: Sí, apoyamos la fabricación de rodamientos personalizados basados en dibujos, especificaciones o muestras proporcionadas por el cliente para aplicaciones especializadas.
Ready to order or need a quote?
Conveyor systems, press equipment, rotating shafts
Steel & Metallurgy
Need Reliable NSK NJ420em, NJ421em, NJ422em Cylindrical Roller Bearings? Here’s What Matters
Packaging & Shipping
Send the bearing model, dimensions (d x D x B), and quantity — we’ll get back to you with pricing and lead time.
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Product Summary
- Product Name
- NSK Cylindrical Roller Bearing NJ420em NJ421em NJ422em
- Category
- Cylindrical Roller Bearing
- Brand
- SKF
- Certification
- ISO 9001 · TS 16949
- Lead Time
- 7 Working Days
Get a Custom Quote
Our engineers will respond within 12 hours with a tailored solution.
Request QuoteGeneral Specifications
| Bearing Type | Cylindrical Roller Bearing |
| Brand | SKF |
| Quality Standard | ISO 9001 / TS 16949 |
| Precision Grade | P0 / P5 / P6 (custom) |
| Material | Chrome Steel / Stainless |
| Cage Material | Steel / Brass / Polyamide |
| Lubrication | Grease / Oil (specify) |
| Operating Temp. | -40°C to +200°C |
| Min. Order Qty | 1 pc (samples available) |
| Prototype Lead Time | 7 Working Days |
Performance Parameters
| Load Capacity | Contact for C0/Cr values |
| Speed Rating | Contact for ndm limit |
| Vibration Level | Z1 / Z2 / Z3 (custom) |
| Noise Level | V1 / V2 / V3 (custom) |
| Fatigue Life | L10h per ISO 281 |
| Sealing Options | Open / Z / 2Z / RS / 2RS |
Custom Specifications Available
Our engineering team can modify bearing dimensions, materials, seals, and clearances to meet your specific operating requirements. Submit your drawing or spec sheet for a tailored proposal.
Wind Power
Main shaft bearings, gearbox bearings, and generator bearings for onshore and offshore wind turbines.
Mining & Quarrying
Heavy-duty bearings for crushers, conveyors, and rotary equipment in extreme dust and shock-load environments.
Steel & Metallurgy
High-temperature bearings for rolling mills, continuous casting, and furnace applications.
Automotive / EV
Wheel hub bearings, transmission bearings, and e-motor bearings for passenger and commercial vehicles.
Rail Transit
Axle box bearings, traction motor bearings, and gearbox bearings meeting EN/UIC railway standards.
Precision Machinery
High-precision spindle bearings, angular contact bearings, and super-precision bearings for CNC and robotics.
Application Design
EngineeringOur engineers analyze your operating conditions -- load, speed, temperature, environment -- and select or design the optimal bearing solution to maximize service life and reduce total cost of ownership.
Custom Modification
7-Day TurnaroundNeed non-standard dimensions, special materials, or modified clearances? We can modify standard SKF bearings or manufacture fully custom solutions with a 7-day prototype turnaround.
Failure Analysis
DiagnosticsWhen bearings fail prematurely, our team conducts root-cause analysis using advanced diagnostic tools to identify the failure mode and recommend corrective action.
Predictive Maintenance
Up to 40% Less DowntimeWe deploy vibration monitoring, thermal imaging, and oil analysis programs that detect bearing deterioration early -- reducing unplanned downtime by up to 40%.
On-site Installation
Global CoverageProper installation is critical to bearing performance. Our certified technicians provide on-site installation support, alignment verification, and operator training worldwide.
Lifecycle Support
Enterprise SLAFrom initial selection through end-of-life, our dedicated account managers provide scheduled maintenance plans, re-lubrication programs, and replacement forecasting for enterprise clients.
Why SKF China
The engineering partner advantage
7 Days
Prototype Lead Time
vs. 8-12 weeks via standard channels
15+
Certified Engineers
SKF-certified, on-call for your project
50+
Countries Delivered
Reliable global logistics network
Request a Quote
Get a custom quote for
NSK Cylindrical Roller Bearing NJ420em NJ421em NJ422em
NDA protected · Free samples for orders > $50K · Reply within 12 hours
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