Cylindrical Roller Bearing
ISO 9001 Certified
TS 16949
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Cylindrical Roller Bearing
N221EM Cylindrical Roller Bearing – High-Precision Lathe Spindle
Basic Info
| Inner Diameter | 105 mm |
|---|---|
| Outer Diameter | 190 mm |
| Width | 36 mm |
Introduction
NUP221EM is a high-precision cylindrical roller bearing made of bearing steel, designed for radial load applications. It features an open seal type, single-row structure, and supports oil, grease, or dry lubrication. Suitable for OEM/ODM use with P0–P2 precision ratings.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
Key Specifications & Advantages of SKF-Grade NUP221EM Cylindrical Roller Bearing
| Description | Core Value |
|---|---|
| Model: NUP221EM (interchangeable with N221EM, NJ221EM, NF221EM, NU221EM) | Universal fit for lathe spindles & precision machinery — no redesign needed |
| Dimensions: 105×190×36 mm (standard ISO metric size) | Direct OEM replacement — reduces downtime and inventory complexity |
| Material: High-purity GCR15 bearing steel (equivalent to SKF SSF 5010) | Superior hardness (HRC 60–64) and fatigue resistance vs. generic steel |
| Precision Grade: P0/P6/P5 available (P5 = ±3 µm radial runout) | Enables high-speed spindle stability (>8,000 rpm) and micron-level accuracy |
| Load Capacity: High radial + axial (single-direction) via fixed NUP flange | Optimized for heavy-duty turning, grinding, and CNC applications |
| Seal Type: Open (grease/oil/dry lubrication compatible) | Flexibility for diverse cooling/lubrication systems — ideal for OEM integration |
| Separable Design | Easy installation, maintenance & shaft alignment — saves labor cost |
| Origin: China (ISO 9001 & IATF 16949 certified production) | Rigorous 100% dimensional & noise testing — meets SKF performance benchmarks |
| HS Code: 8482500090 (globally recognized for customs clearance) | Hassle-free international shipping & documentation support |
| Applications: CNC lathes, gearboxes, rolling mills, pump shafts, machine tool spindles | Proven in >12 industrial sectors — request case studies |
Why choose our NUP221EM over standard alternatives? We match SKF’s dynamic load rating (Cr = 245 kN), use vacuum-degassed steel, and apply optimized roller profiling — reducing edge stress by 22%. All units are pre-lubricated with Klüber Isoflex NBU 15 grease (optional).
FAQ: Q: Is preload adjustment supported? A: Yes — NUP design allows precise axial location. Q: Can it replace SKF NUP221E? A: Fully interchangeable (same ABEC-1/P6 tolerances). Q: What’s the max operating temperature? A: 120°C continuous (150°C peak, with proper lubrication).
Ready to validate performance in your application? Send your inquiry now — get technical datasheets, sample lead time, and spindle compatibility analysis within 2 hours.
Product Summary
- Product Name
- N221EM Cylindrical Roller Bearing – High-Precision Lathe Spindle
- 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
N221EM Cylindrical Roller Bearing – High-Precision Lathe Spindle
NDA protected · Free samples for orders > $50K · Reply within 12 hours
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