Cylindrical Roller Bearing
ISO 9001 Certified
TS 16949
Genuine SKF
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Cylindrical Roller Bearing
NSK KOYO N203EM Cylindrical Roller Bearing, High Precision, 17x40x12mm
Basic Info
| Inner Diameter | 17 mm |
|---|---|
| Outer Diameter | 40 mm |
| Width | 16 mm |
Introduction
Cylindrical roller bearing NUP203EM, made of bearing steel, radial load type, open seal, single row, precision grades P0–P2. Suitable for OEM/ODM applications. Lubrication: oil, grease or dry. Outer dimension range: 35–400 mm. Origin: China. HS Code: 8482500090.7
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
NSK KOYO NUP203EM Cylindrical Roller Bearing – High-Precision Radial Solution
| Description | Key Spec / USP |
|---|---|
| Ultra-Precise Radial Load Capacity | P0–P2 precision grades; ideal for high-speed spindles & gearboxes |
| Robust Bearing Steel Construction | Chrome steel (GCr15) with strict heat treatment per ISO 634/ISO 281 |
| Optimized Internal Geometry | NUP-type fixed-locating design: inner ring double flange + outer ring single flange + loose rib |
| Low-Friction, High-Efficiency Operation | Ground rollers & raceways ensure <0.002mm form tolerance and minimal torque variation |
| Open Design for Flexible Lubrication | Compatible with oil, grease, or dry-film lubricants — no seal drag loss |
| Global Brand Compatibility | Cross-interchangeable with SKF, NTN, Timken, and FAG equivalents (e.g., SKF NUP203E) |
| Wide Size Range & OEM Support | 17×40×16 mm standard; scalable to 35–400 mm OD; full OEM/ODM service available |
| Strict Quality Assurance | 100% dimensional inspection + noise testing + vibration screening (ISO 15242-3 compliant) |
| Industry-Proven Reliability | Used in CNC machines, wind turbines, industrial pumps, and automotive transmissions |
| Frequently Asked Questions | Q: Is this bearing suitable for axial loads? A: NUP203EM handles limited bi-directional axial loads due to its fixed-locating structure. For pure thrust, consider NU/NJ+NUP combos. |
Ready to source certified cylindrical roller bearings with fast lead times and technical support? Send your inquiry now — our engineers will respond within 2 hours with specs, CAD files, and competitive pricing.
Product Summary
- Product Name
- NSK KOYO N203EM Cylindrical Roller Bearing, High Precision, 17x40x12mm
- 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 KOYO N203EM Cylindrical Roller Bearing, High Precision, 17x40x12mm
NDA protected · Free samples for orders > $50K · Reply within 12 hours
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