Cylindrical Roller Bearing
ISO 9001 Certified
TS 16949
Genuine SKF
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Cylindrical Roller Bearing
Koyo N220em N221em N222em Cylindrical Roller Bearing
Ensure smooth, reliable operation in your machinery with these precision-engineered Koyo Cylindrical Roller Bearing models (N220em, N221em, N222em). Designed to handle heavy radial loads while minimizing friction, they’ll keep your equipment running longer between maintenance checks—no unexpected downtime to slow your workflow.
- Optimized EM-series design reduces heat buildup during high-speed rotation, ideal for continuous-duty applications
- Precision-ground raceways ensure consistent performance, even under variable load conditions
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
Looking for Reliable Koyo N220em/N221em/N222em Cylindrical Roller Bearings? Here’s What Matters
Specifying the right cylindrical roller bearing can mean the difference between smooth equipment operation and costly unplanned downtime. Many buyers struggle with mismatched dimensions across different standard systems or waste time sourcing from multiple suppliers for various brands. When precision matters—whether in high-load industrial applications or critical machinery—access to verified quality and comprehensive product knowledge becomes essential.
Construido para un rendimiento de alta resistencia en diversas industrias
The Koyo N220em, N221em, and N222em cylindrical roller bearings are engineered to deliver consistent performance in demanding environments. As a professional bearing supplier with ISO 9001-certified quality processes, we ensure these bearings meet strict dimensional and hardness standards, making them suitable for applications in工程机械, steel冶金, and automation equipment. Our extensive inventory includes both these Koyo models and compatible alternatives across international brands, allowing one-stop sourcing without compromising on specifications.
Rendimiento Óptimo en Aplicaciones de Carga Radial Alta
These cylindrical roller bearings excel in scenarios with heavy radial loads and moderate axial displacement, common in conveyor systems, gearboxes, and hydraulic pumps. Their robust design handles continuous operation at varying speeds while maintaining dimensional stability, even in temperature ranges typical of industrial settings. Properly selected for load capacity and precision class, they minimize vibration and extend equipment service life.
Detalles de ingeniería que impactan la fiabilidad
The N220em, N221em, and N222em series feature precision-ground raceways and rollers, ensuring uniform load distribution and reduced friction. Their cylindrical bore design allows for easy mounting and dismounting, facilitating maintenance. The “em” suffix indicates enhanced internal geometry optimized for higher dynamic load ratings (C), critical for applications with cyclic loading. Surface hardness testing confirms resistance to wear, while tight dimensional tolerances ensure interchangeability with major international standards—key for替换 parts in legacy equipment. Por qué la calidad de los rodamientos afecta el costo total de propiedad
Choosing substandard cylindrical roller bearings often leads to premature failure, resulting in unplanned downtime, repair labor, and potential damage to adjacent components. These Koyo models, backed by rigorous quality control, help avoid such hidden costs. By adhering to ISO 281 fatigue life standards, they provide predictable performance, allowing for scheduled maintenance rather than emergency repairs. Our focus on total cost—rather than just unit price—ensures long-term value for your equipment investment. Calidad en la que puedes confiar
Our cylindrical roller bearings undergo comprehensive testing, including raw material verification, dimensional inspection, and hardness testing, ensuring compliance with industry standards. We stand behind our products with a warranty covering manufacturing defects, providing peace of mind for your critical applications. Whether you require the exact Koyo models or equivalent specifications from other brands, our global supply chain ensures access to authentic, quality-assured bearings with flexible order quantities. Embalaje industrial estándar adecuado para transporte de larga distancia Disponible en stock para despacho inmediato
Bajo mínimo de pedido para apoyar tanto reparaciones a pequeña escala como grandes producciones
Need to confirm availability or pricing for the N220em, N221em, N222em, or alternative cylindrical roller bearings? Provide your required model, quantity, and delivery location, and our technical team will assist with specifications and lead times. We handle all major brands and can source hard-to-find models to keep your operations running smoothly. Preguntas Frecuentes
Q: ¿Suministran rodamientos de rodillos cilíndricos de otras marcas además de ?
A: Yes, we offer a full range of cylindrical roller bearings across international brands including SKF, NSK, NTN, and NACHI, as well as domestic quality manufacturers. We can source to your exact brand specification. Q: How can I verify if the N220em/N221em/N222em will fit my equipment? A: Provide your equipment’s bearing dimensions (bore diameter d, outer diameter D, width B) or original part number, and our engineering team will cross-reference specifications to confirm compatibility. Q: What warranty coverage do these bearings come with? A: We provide a warranty against manufacturing defects. Specific terms depend on application and usage conditions, with details outlined in our sales agreement. Q: ¿Cuál es la cantidad mínima de pedido para estos modelos ?
A: Apoyamos cantidades mínimas de pedido bajas, incluyendo compras de una sola unidad para reparaciones de emergencia, con precios por volumen disponibles para pedidos más grandes. Q: How quickly can you ship the N220em/N221em/N222em bearings? A: Stock items ship within 1-2 business days. For non-stock models, lead times vary by brand and availability, typically 2-4 weeks for international orders. P: ¿Ofrecen rodamientos de rodillos cilíndricos personalizados para aplicaciones especializadas?
A: Yes, we support OEM/ODM customization for non-standard dimensions, materials, or lubrication requirements. Contact us with your technical drawing or specifications for a feasibility assessment. Ready to order or need a quote?
Packaging & Shipping
Request a Quote for Koyo Cylindrical Roller Bearings
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
- Koyo N220em N221em N222em Cylindrical Roller Bearing
- 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
Koyo N220em N221em N222em Cylindrical Roller Bearing
NDA protected · Free samples for orders > $50K · Reply within 12 hours
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