Description
NTN NJ340EM / NU340EM / NJ344EM / NU344EM Cylindrical Roller Bearings – High-Precision, Japan-Made Performance
| Description | Key Selling Point |
|---|---|
| Model Range | NJ340EM, NU340EM, NJ344EM, NU344EM — optimized for heavy radial loads & high-speed operation |
| Material & Precision | High-carbon chromium bearing steel (SUJ2), P0–P2 precision grades — ISO 9001 & JIS B 1514 certified |
| Dimension Range | Bore: 15–90 mm; OD: 35–180 mm; Spec: 200×420×80 mm — ideal for industrial gearboxes & motors |
| Load & Structure | Radial-only, cylindrical roller design with separable rings — enables easy mounting & maintenance |
| Lubrication Flexibility | Compatible with premium grease or oil — extended service life in continuous-duty applications |
| Vibration Control | Z1V1–Z3V3 low-noise grading — meets strict OEM requirements for quiet, stable rotation |
| Origin & Reliability | Manufactured in Japan — superior heat treatment & grinding consistency vs. generic alternatives |
| OEM/ODM Support | Full customization available: cages, clearances, surface treatments, packaging — backed by NTN’s global warranty |
| Application Scope | Wind turbines, mining conveyors, paper mills, steel rolling mills, and marine propulsion systems |
| Why Choose NTN Over Others? | Higher dynamic load rating (+12% avg vs. standard P0), tighter dimensional tolerances, and proven fatigue life in harsh environments |
FAQ: Are these bearings interchangeable with SKF NUP/NJ series? Yes — dimensions & load ratings align closely; NTN offers better thermal stability under sustained 150°C+ operation. Do they support axial displacement? NJ-type retains axial location on one side; NU-type is fully floating — confirm shaft/housing fit per application. What cage options exist? Brass, polyamide, and pressed steel — selected based on speed & temperature profile.
Ready to specify the right NTN cylindrical roller bearing for your project? Send your inquiry now — our technical team replies within 2 business hours with CAD data, compatibility reports, and volume pricing.
