
IKO (Nippon Thompson Co., Ltd.) is a Japanese manufacturer specializing in high-quality precision bearings and mechanical components, with a strong focus on needle roller bearings, linear motion products, and mechatronic systems. Founded in 1950, IKO has gained global recognition for engineering innovation, compact designs, and high performance in space-constrained and high-load applications.
1. Key Bearing Types Offered by IKO
IKO is especially known for its needle roller bearings, which offer high load capacity in a compact form. Major bearing types include:
A. Needle Roller Bearings
IKO is one of the top global manufacturers in this category.
Radial Needle Roller Bearings
High radial load capacity with minimal cross-section
Available with/without inner rings
Applications: automotive, motorcycles, industrial machines
Needle Roller and Cage Assemblies
Only rollers and cage, used with hardened shafts and housings
Very compact and high-speed capable
Needle Roller Bearings with Inner Rings
Provide an integrated solution with precision ground inner rings
Ideal for use where the shaft cannot be hardened
Cam Followers (CF series)
Stud-type bearings with needle rollers
Ideal for track-following, indexing, and reciprocating motion
Roller Followers (NART, NURT series)
Outer ring with thicker wall for high radial loads
Also used for cam and track applications
B. Linear Motion Bearings
IKO has a significant presence in linear guides and motion systems.
Linear Way (LWL, LWH, LWHT series)
Precision miniature and standard rail-and-block guides
Low friction, high rigidity
Linear Roller Way
Uses rollers instead of balls for higher load capacity
Linear Ball Spline
For combined rotary and linear motion
Crossed Roller Bearings
High rotational accuracy and load support in all directions
Ideal for robots, machine tools, and medical devices
2. Features of IKO Bearings
Compact design with high load capacity
Low profile and lightweight
High rotational accuracy
Good for high-speed operation
Smooth motion and low noise
Corrosion-resistant versions available
3. Applications
IKO bearings are widely used in:
Robotics
Medical devices
Semiconductor machinery
Automotive transmissions and engines
Machine tools
Packaging equipment
Conveyors and material handling
4. IKO Bearing Numbering System
IKO part numbers typically include:
Bearing type code (e.g., CF for Cam Follower)
Size and dimensions
Modifications (e.g., seal type, material, coating)
Example: CF10-1UUR
CF = Cam follower
10 = Shaft diameter
1 = Metric series
UU = Both sides sealed
R = With crowned outer ring
5. Special Technologies
IKO C-Lube Bearings:
Solid lubricant built into the bearing
Long-term maintenance-free performance
Corrosion-resistant stainless steel versions:
Ideal for medical, food, and marine applications
IKO Mechatronics:
Integrated bearing + actuator systems
Precision motion control systems (used in automation and robotics)
6. Services and Support
IKO offers:
Technical consultation
Custom bearing solutions
CAD models and catalogs
Product training and application guidance
IKO vs. Other Bearing Brands
Feature IKO SKF Timken
Known For Needle bearings, linear guides Wide range, general bearings Tapered roller bearings
Specialty Miniature and precision bearings Durable, energy-efficient High-load, rugged applications
Linear Motion Expertise High Moderate Limited
Common in Robotics/MedTech Yes Less so Rarely
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