IKO Thrust Bearings
- Technical Overview
IKO thrust bearings are precision-engineered components specifically designed to handle axial loads while maintaining rotational accuracy. These bearings utilize optimized roller geometries and advanced material technologies to deliver superior performance in demanding applications.
1.1 Key Design Features
Roller Configurations:
Cylindrical rollers (L/D ratio 1:1 to 3:1)
Needle rollers (L/D ratio 4:1 to 10:1)
Asymmetric crowning profiles (5-15μm)
Cage Systems:
Machined brass cages (CAC306)
Glass fiber-reinforced polyamide (PA66-GF25)
Steel stampings (SPCC, 0.3-1.2mm thickness)
Raceway Geometry:
Flat raceways (standard)
Spherical seat raceways (±2° self-alignment)
Grooved raceways (for combined loads)
- Performance Specifications
2.1 Load Capacity Ratings
| Series | Dynamic Load (C) | Static Load (Co) | Speed Limit |
| TLA20 | 32 kN | 58 kN | 3,000 rpm |
| TNA30 | 68 kN | 120 kN | 2,400 rpm |
| TTH50 | 185 kN | 340 kN | 1,800 rpm |
All values per ISO 104 standards
2.2 Operating Parameters
Temperature Range:
Standard: -30°C to +120°C
Extended: -50°C to +250°C (special materials)
Friction Characteristics:
Starting torque: 0.15-0.45 Nm
Running torque: 0.08-0.25 Nm
Stiffness Values:
Axial stiffness: 200-800 N/μm
Tilt stiffness: 5,000-20,000 Nm/rad
- Material Technology
3.1 Metallurgical Composition
Roller Elements:
SUJ2 bearing steel (HRC 60-64)
Alternative: Silicon nitride (HV1500)
Precision grinding to ±0.5μm diameter tolerance
Raceway Materials:
Case-carburized SCM420 (HRC 58-62)
Through-hardened SUJ2 (HRC 60-64)
Corrosion-resistant SUS440C (HRC 56-58)
3.2 Surface Treatments
| Treatment | Thickness | Hardness | Friction Coefficient |
| Black oxide | 2-4μm | HV300 | 0.12-0.15 |
| DLC | 1-2μm | HV2000 | 0.05-0.08 |
| TiN | 3-5μm | HV2300 | 0.10-0.12 |
- Product Series Breakdown
4.1 Needle Thrust Bearings (TNA Series)
Key Features:
Ultra-thin sections (2-5mm height)
High load density (350 N/mm²)
Integrated washers
Applications:
Automotive transmissions
Compact gearboxes
Medical devices
4.2 Cylindrical Thrust Bearings (TTH Series)
Key Features:
Heavy-duty construction
Spherical seat adapters
Sealed variants available
Applications:
Crane slewing rings
Wind turbine pitch systems
Hydraulic presses
4.3 Combined Load Bearings (TLA Series)
Key Features:
45° contact angle
Radial load capacity: 30% of C
Preload options
Applications:
Machine tool spindles
Robotics rotary joints
Aerospace actuators
- Application Engineering
5.1 Industrial Machinery
Press Applications:
Impact load capacity: 3× static rating
Shock resistance: 50g acceleration
Maintenance intervals: 10,000 hours
5.2 Energy Sector
Wind Turbines:
Corrosion protection: 1000h salt spray
Moment stiffness: 15,000 Nm/rad
-40°C low-temperature operation
5.3 Transportation
Railway Systems:
Vibration resistance: 10-500Hz spectrum
Fire-retardant materials
1 million km service life
- Mounting & Maintenance
6.1 Installation Guidelines
Surface Requirements:
Flatness ≤0.01mm/100mm
Parallelism ≤0.02mm
Hardness ≥55 HRC
Mounting Forces:
F = 0.5 × C₀ × (d/D)
(F: seating force [kN], d: bore [mm], D: OD [mm])
6.2 Lubrication Systems
Grease Specifications:
| Type | Base Oil | Thickener | Temp Range |
| Standard | Mineral | Lithium | -30/+120°C |
| High-speed | Ester | Polyurea | -40/+180°C |
| Extreme pressure | PAO | Complex soap | -50/+200°C |
Relubrication Intervals:
L = (C/P)³ × 10⁶ / (60 × n)
(L: hours, P: actual load [kN], n: rpm)
- Quality Assurance
Testing Protocols:
100% torque testing
3D surface profilometry
Accelerated life testing (200% C for 500h)
Certifications:
ISO 9001:2015
IATF 16949
DNV-GL marine approval
- Special Configurations
Custom Designs:
Non-standard bore/OD combinations
Integrated sensors (temperature/strain)
Hybrid ceramic versions
Vacuum-compatible models
This technical specification provides comprehensive data for proper selection and application of IKO thrust bearings in critical axial load situations. The combination of advanced materials, precision engineering, and application-specific designs ensures optimal performance across industrial sectors.
IKO thrust bearing is a specially designed bearing mainly used to bear axial loads. IKO thrust bearing usually consists of a thrust ball or roller, mounted on a shaft, used to support rotating or reciprocating parts.
Features and Applications
The main features of IKO thrust bearing include:
High load capacity: Able to bear large axial loads.
Low friction: Design reduces friction and improves efficiency.
Long life: High-quality materials and advanced manufacturing processes are used to ensure the durability of the bearing.
These characteristics make IKO thrust bearing widely used in various occasions requiring high load capacity and low friction, such as:
Mechanical equipment: Such as heavy machinery, construction machinery, etc.
Automotive industry: Used for automotive gearboxes, differentials and other components.
Railway transportation: Used for bogies and braking systems of railway vehicles.
Aerospace: Used for aircraft landing gear and engine components.
Models and specifications
IKO offers a variety of models of thrust bearings to meet different application requirements. For example, IKO’s NAX series thrust needle roller bearings have the characteristics of high rotation speed and low noise, and are suitable for household appliances, power tools, small motors, medical equipment, office equipment and sports equipment, etc.
