NTN N321EM Cylindrical Roller Bearing – High-Precision, Heavy-Duty, ISO Standard
Product Specifications
| Bore Diameter | 15–90 mm |
| Outer Diameter | 35–180 mm |
| Width/Thickness | 49 mm |
Introduction
This NTN cylindrical roller bearing (Model N321em) is made of high-grade bearing steel, designed for radial load applications. It features non-aligning spherical structure, precision ratings from P0 to P2, and supports grease or oil lubrication. Ideal for OEM/ODM use with low vibration (Z1V1–Z3V3) and reliable performance in industrial machinery.
Apple Shopping Event
Hurry and get discounts on all Apple devices up to 20%
Sale_coupon_15
-
Pick up from the Woodmart Store
To pick up today
Free
-
Courier delivery
Our courier will deliver to the specified address
2-3 Days
Free
-
DHL Courier delivery
DHL courier will deliver to the specified address
2-3 Days
Free
-
Warranty 1 year
-
Free 30-Day returns
Payment Methods:
Description
NTN Japan Cylindrical Roller Bearing N321EM Series – Precision, Durability & OEM-Ready Performance
| Description | Key Specification |
|---|---|
| Ultra-Precise Radial Load Handling | Rated for heavy radial loads; ideal for high-speed industrial gearboxes & motors |
| Japanese-Built Quality | Made in Japan with JIS G4805 bearing steel — strict dimensional & metallurgical control |
| Multiple Mounting Options | N321EM / NJ321EM / NF321EM / NU321EM / NUP321EM — optimized for fixed/floating/locating arrangements |
| Tight Tolerance Grades | P0 (standard) to P2 (ultra-precision); compliant with ISO 492 & JIS B1514 |
| Vibration-Optimized | Z1V1 to Z3V3 grading — ensures smooth operation in precision machine tools & pumps |
| Robust Sealing & Lubrication | Grease- or oil-lubricated; compatible with SKF LGMT 2 & LGLT 2 greases |
| Compact, High-Capacity Design | 105 × 225 × 49 mm (d×D×B); 15–90 mm bore range; 35–180 mm OD — maximizes load density |
| OEM/ODM Supported | Full documentation, traceable batch logs, and custom packaging available |
| Global Compliance | HS Code 8482500090; meets RoHS, REACH, and ISO 9001 manufacturing standards |
| Why Choose NTN Over Generic Brands? | Lower noise, longer L10 life (>2x vs. non-Japanese equivalents), and superior roller profile grinding accuracy |
Applications: Steel mill rollers, wind turbine gearboxes, mining conveyors, CNC lathes, and railway axle boxes.
FAQ: Q: Are these bearings interchangeable with SKF NU321E? A: Yes — identical dimensions & load ratings; NTN offers tighter vibration control. Q: Can I get P4 grade with Z2V2? A: Yes — lead time +2 weeks. Q: Do you supply grease-filled versions? A: Standard is dry; grease-fill optional (specify NLGI grade).
Need technical support or volume pricing? Send your inquiry now — our NTN-certified engineers reply within 2 business hours.
