NTN Corporation is one of the world’s leading manufacturers of bearings, constant velocity joints, and precision equipment. Headquartered in Osaka, Japan, and established in 1918, NTN is globally recognized for high-performance, reliable, and durable bearing solutions across a wide array of industries.
🛠️ 1. Types of Bearings Offered by NTN
NTN manufactures a broad range of bearing types, each engineered for specific applications and conditions:
A. Ball Bearings
Deep Groove Ball Bearings
Most widely used type
Supports radial and moderate axial loads
Available in open, shielded (ZZ), or sealed (LLB, LLU) versions
Angular Contact Ball Bearings
Designed to handle combined axial and radial loads
Typically used in pairs or sets
Common in machine tools and pumps
Self-aligning Ball Bearings
Accommodates misalignment
Used in applications with shaft deflection
B. Roller Bearings
Cylindrical Roller Bearings
High radial load capacity
Good for high-speed applications
Tapered Roller Bearings
Handle large radial and axial loads
Common in automotive and heavy machinery
Spherical Roller Bearings
Accommodate misalignment and heavy loads
Ideal for harsh environments like mining and steel mills
Needle Roller Bearings
High load capacity in compact space
Widely used in transmissions and gearboxes
C. Thrust Bearings
Designed to support axial loads
Includes thrust ball bearings, cylindrical roller thrust, and spherical roller thrust bearings
D. Special Bearings
Ceramic Bearings: High-speed, low friction, used in aerospace and precision equipment
Insulated Bearings: Designed to prevent electrical erosion, ideal for electric motors
🌟 2. Key Features of NTN Bearings
High-quality steel for extended service life
Advanced sealing technology to prevent contamination
Grease retention and lubrication options for reduced maintenance
Precision and quiet operation (especially in electric motors)
Corrosion-resistant variants for food, chemical, and marine industries
⚙️ 3. Applications
NTN bearings are used across diverse sectors:
Automotive (wheel hubs, transmission, A/C systems)
Industrial Machinery
Aerospace
Agriculture
Railways
Wind and Renewable Energy
Medical Equipment
🔢 4. NTN Bearing Numbering System
NTN uses standardized and proprietary codes to describe bearing types and features.
Example: 6206ZZC3
6206 = Deep groove ball bearing with 30 mm bore
ZZ = Double shielded
C3 = Internal clearance (greater than normal)
Additional codes may indicate:
Seal type (LLU, LLB, ZZ)
Internal clearance (C3, C4)
Tolerance class (P5, P6)
Special materials or heat treatment (e.g., ET for case carburized steel)
🧪 5. Specialized NTN Technologies
Ultra-Class Bearings: Premium line for extreme conditions
Bower® Bearings: U.S. brand under NTN, known for heavy-duty tapered roller bearings
Sentinel Series: Maintenance-free, corrosion-resistant bearings with solid lubrication for food processing
MEGAOHM™ Series: Insulated bearings for electric motors
UCM™ (Ultra-Class Mounted Units): Pre-lubricated and sealed bearing units for tough environments
🧰 6. Services Offered by NTN
Custom bearing solutions
Engineering and application support
Condition monitoring and predictive maintenance
Training and failure analysis
On-site inspection and installation services
📊 NTN vs. Other Bearing Brands
Feature NTN SKF Timken IKO
Strength Versatile & durable Innovative & energy-efficient Heavy-duty & rugged Precision & compact design
Known For Ball and industrial bearings Ball & spherical bearings Tapered roller bearings Needle and linear bearings
Automotive Expertise High High High Moderate
Linear Motion Products Available Available Limited Strong offering
