Cylindrical Roller Bearing
ISO 9001 Certified
TS 16949
Genuine SKF
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Cylindrical Roller Bearing
Koyo N2221em N2222em N2224em Cylindrical Roller Bearing
Experience smoother, longer-lasting machinery performance with precision-engineered Koyo Cylindrical Roller Bearings designed to handle heavy radial loads without compromising speed. This reliable solution minimizes downtime by reducing friction and wear, ensuring your equipment runs at peak efficiency when you need it most.
- Includes N2221em, N2222em, and N2224em variants for versatile shaft diameter compatibility
- Engineered with optimized cage design to enhance lubricant circulation and heat dissipation
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
Product Specifications
| Parameter | Details |
|---|
Application Suitability
| Industry | Typical Applications |
|---|
Struggling with Cylindrical Roller Bearing Selection? Koyo N2221em/N2222em/N2224em Options Explained
When machinery downtime hits because of bearing failure, the cost adds up quickly—missed production targets, maintenance overtime, and emergency replacement parts. Many buyers face the same challenge: finding the right cylindrical roller bearing that matches both technical specifications and application demands without sifting through dozens of suppliers.
Built for Reliable, Long-Term Performance
The Koyo N2221em, N2222em, and N2224em cylindrical roller bearings address these pain points by following international dimensional standards, ensuring interchangeability with major brands. Our ISO 9001-certified supply chain includes comprehensive testing—from raw material inspection to成品尺寸 and hardness verification—so you receive bearings that meet industrial performance expectations. Whether for conveyor systems, hydraulic pumps, or machine tool spindles, these bearings deliver consistent load handling and durability.
Where This Bearing Performs Best
Designed for high radial load applications, these cylindrical roller bearings excel in environments with moderate speeds and minimal axial movement. Common use cases include gearboxes in steel mills, motor housings in mining equipment, and crankshaft supports in industrial compressors. The EM suffix indicates optimized internal geometry, providing improved load distribution and reduced friction under continuous operation.
Engineering Details That Matter
Cylindrical roller bearings like the N2221em series feature separable inner or outer rings, simplifying installation and maintenance—critical when equipment access is limited. The roller profile design minimizes stress concentration at contact points, extending fatigue life by up to 30% compared to standard designs in heavy-duty applications. Precision class manufacturing ensures tight dimensional tolerances, reducing vibration in high-speed rotating assemblies. Surface hardness of HRC 58-62 on raceways and rollers guarantees resistance to wear, even in dusty or contaminated environments.
Why Bearing Selection Affects Total Cost
Choosing the wrong cylindrical roller bearing can lead to premature failure, costing far more than the initial savings from a lower-quality alternative. A bearing with insufficient load rating may fail within months, damaging shafts and housings. Properly selected bearings, however, operate within their dynamic load capacity (C) and static load capacity (C0), aligning with ISO 281 life calculation principles to maximize service intervals. This reduces maintenance frequency and unplanned downtime, lowering your total cost of ownership over time.
Quality You Can Rely On
Our procurement process ensures every Koyo N2221em, N2222em, and N2224em bearing meets strict quality criteria. Each unit undergoes dimensional inspection for bore diameter (d), outside diameter (D), and width (B) to confirm compliance with industry standards. We provide a质保期 against manufacturing defects, and our team can assist with material certification documentation upon request. With access to both international brands and domestic alternatives, we source exactly what you need without compromising on quality.
Packaging & Shipping
- Neutral industrial packaging with anti-corrosion protection
- Available from stock for prompt dispatch
- Flexible shipping options: express courier, air freight, or sea freight
- Low minimum order quantity, suitable for both small repairs and large-scale projects
Request a Quote for Koyo Cylindrical Roller Bearings
Need to confirm availability or pricing for the N2221em, N2222em, or N2224em model? Provide your required quantity and destination, and we’ll respond with a detailed quote within 24 hours. We also handle custom specifications—let us know if you need bearings with special lubrication, seals, or coating.
Frequently Asked Questions
Q: Can you supply other brands or models of cylindrical roller bearings?
A: Yes, we support inquiries for all major brands and型号, including SKF, NSK, NTN, and domestic alternatives, sourced to your exact specifications.
Q: How do I ensure this bearing fits my equipment?
A: Provide your existing bearing’s dimensions (d x D x B) or equipment model number, and our technical team will verify compatibility with the N2221em/N2222em/N2224em series.
Q: What is your warranty policy for these bearings?
A: We offer a质保期 covering manufacturing defects; specific terms are detailed in each order confirmation and can be tailored to project requirements.
Q: What is the minimum order quantity?
A: We accept low minimum orders, including single units for emergency replacements, with volume discounts available for larger quantities.
Q: How long does shipping take?
A: In-stock bearings ship within 1-2 business days; delivery time depends on location—express options for urgent needs, standard shipping for cost efficiency.
Q: Do you offer custom bearing solutions?
A: Yes, OEM/ODM services are available for special designs, including modified dimensions, materials, or surface treatments, based on your technical drawings.
Ready to order or need a quote?
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 N2221em N2222em N2224em 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 N2221em N2222em N2224em Cylindrical Roller Bearing
NDA protected · Free samples for orders > $50K · Reply within 12 hours
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