Cylindrical Roller Bearing
ISO 9001 Certified
TS 16949
Genuine SKF
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Cylindrical Roller Bearing
High Precision N304EM Cylindrical Roller Bearing – China Made, ISO Certified
Basic Info
| Bore Diameter | 15–90 mm |
|---|---|
| Outer Diameter | 35–180 mm |
| Width | 15 mm (e.g., 20×52×15 mm) |
Introduction
Cylindrical roller bearing 307, model NUP304EM, made of bearing steel. Designed for radial loads, non-aligning, separated structure. Precision grades P0–P2, vibration classes Z1V1–Z3V3. Lubricated with grease or oil. OEM/ODM service available. Origin: China.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 & Why SKF-Grade Buyers Choose This Cylindrical Roller Bearing
| Description | Core Value |
|---|---|
| Model Range: N304EM / NJ304EM / NF304EM / NU304EM / NUP304EM | Interchangeable high-precision series — ideal for OEM retrofit & global standard compliance |
| Bore Size: 15–90 mm | OD: 35–180 mm | Spec: 20×52×15 mm | Compact yet robust design — fits tight-space industrial gearboxes and motors |
| Material: Premium GCR15 Bearing Steel | Extended fatigue life + superior hardness (HRC 61–65) vs. generic carbon steel |
| Precision Grades: P0, P6, P5, P4, P2 | Meets SKF ABEC-1 to ABEC-9 equivalents — critical for high-RPM applications |
| Vibration Levels: Z1V1 / Z2V2 / Z3V3 | Ultra-low noise operation — certified for precision machine tools & medical equipment |
| Lubrication: Grease or Oil Compatible | Flexible maintenance — supports sealed-for-life or re-lubricatable setups |
| Load Direction: Pure Radial | Optimized for heavy radial loads with minimal friction — 20% higher dynamic load rating than standard ISO 355 |
| Separated Design (NUP/NJ/NF) | Easy installation & axial location control — reduces assembly time by up to 35% |
| OEM/ODM Support + BDL Brand (China Origin) | SKF-compatible specs, full traceability, and factory QC — no counterfeit risk |
| HS Code 8482500090 | Carton/Pallet Packaging | Hassle-free global customs clearance & logistics-ready shipping |
Engineered for demanding applications: CNC spindles, wind turbine gearboxes, mining conveyors, and automotive test rigs. Backed by 100,000-unit/month production capacity and ISO 9001-certified quality control. Unlike budget alternatives, this series features micro-ground raceways, optimized roller profiling, and strict dimensional tolerances (ΔDmp ≤ 8 μm). FAQ: Can it replace SKF NU304E? Yes — identical mounting dimensions and load ratings. Is pre-lubricated grease included? Optional upon request. What’s the max operating temp? 120°C continuous (with lithium complex grease). Ready to verify fitment or request a sample batch? Send your inquiry now — our SKF-experienced engineers reply within 2 hours.
Product Summary
- Product Name
- High Precision N304EM Cylindrical Roller Bearing – China Made, ISO Certified
- 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
High Precision N304EM Cylindrical Roller Bearing – China Made, ISO Certified
NDA protected · Free samples for orders > $50K · Reply within 12 hours
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