IKO Roller Bearings

Product Overview IKO roller bearings represent precision-engineered solutions for high-load, high-speed applications requiring exceptional durability and rotational accuracy. As a leading Japanese manufacturer, IKO specializes in needle roller and cylindrical roller bearing technologies that deliver superior performance in compact designs.

Core Product Lines

2.1 IKO Roller Bearings

Design: Utilize rollers with L/D ratio ≥3:1 (diameter ≤6mm)

Series:

RNA (caged type): 3,500 N/mm² static load capacity

HK/BK (drawn cup): 0.3mm ultra-thin wall thickness

CF (cam followers): Integrated stud shafts

Features:

30-40% more rollers than conventional designs

Logarithmic crowning profiles

ISO P5 to P2 precision grades

2.2 IKO Roller Bearings

Design: Full complement or caged designs

Series:

CRB (crossed roller): Handles combined loads

NUP/NJ (single/double flange): Axial displacement control

Features:

500-2,000 N/μm radial stiffness

≤1μm runout (precision models)

Technical Specifications

3.1 Dimensional Parameters

Bore Sizes: 3mm to 400mm

Width Series: Extra-light (EL) to extra-wide (EW)

Tolerances:

ABEC 1 (ISO Normal) to ABEC 9 (ISO P2)

Radial clearance: C2 to C4 groups

3.2 Performance Data

Load Capacity:

Dynamic: 5.8-1,250 kN

Static: 9.8-2,040 kN

Speed Limits:

Grease: 15,000-40,000 rpm

Oil: 25,000-60,000 rpm

Friction: μ=0.001-0.0035

Material Technology

4.1 Metallurgy

Rollers:

SUJ2 (AISI 52100 equivalent)

HV700-900 hardness

Ceramic options (Si₃N₄)

Rings:

Case-carburized SCM420

0.8-1.2mm hardening depth

4.2 Surface Treatments

Phosphate coating (0.003-0.007mm)

Black oxide (Fe₃O₄)

DLC coating (μ=0.05)

Precision Engineering

5.1 Manufacturing Tolerances

Roundness: ≤0.5μm (ultra-precision)

Surface Finish: Ra ≤0.05μm

Roller Sorting: ±0.2μm diameter grouping

5.2 Cage Technology

Steel (ST): High-speed capability

Polyamide (TV): Reduced friction

Brass (MA): High-temperature stability

Lubrication Systems

6.1 Grease Options

Standard: Lithium complex (120°C limit)

*High-Temp*: PFPE-based (250°C limit)

Solid Film: MoS₂ coating

6.2 Relubrication

Interval: L₁₀ life × 0.7

Quantity: Q=0.02×D×B (grams)

Application Solutions

7.1 Automotive

Transmission bearings (690 MPa stress rating)

Rocker arm pivots (200M cycle life)

7.2 Industrial

Robot reducers (≤1 arc-min backlash)

Machine tool spindles (P4S precision)

7.3 Aerospace

AMS 6444 compliant

200°C continuous operation

Mounting Guidelines

8.1 Shaft/Housing Fits

Shaft: k5/m5 for rotation

Housing: H7 for static rings

Press Force: F=L×d×δ×E×10⁻³ (N)

8.2 Alignment Requirements

≤0.02mm/100mm parallelism

≤0.5° angular misalignment

Quality Assurance

9.1 Testing Protocols

100% dimensional verification (CMM)

Vibration analysis (ISO 15242)

Accelerated life testing

9.2 Certifications

IATF 16949 (automotive)

AS9100D (aerospace)

ISO 14001 (environmental)

Special Features

10.1 Customization

Non-standard bore/OD combinations

Sensor integration (temperature/strain)

Special coatings (TiN, WC/C)

10.2 Smart Bearings

Embedded RFID tags

Wireless condition monitoring

Lot connectivity options

Technical Advantages

40% higher load density vs competitors

60% space savings vs tapered rollers

5-year industrial warranty

Global technical support network