IKO crossed roller bearings represent the pinnacle of rotational accuracy and rigidity, utilizing orthogonally arranged cylindrical rollers to simultaneously handle radial, axial, and moment loads. Designed for precision motion systems requiring micron-level positioning repeatability, these bearings achieve <1 arc-minute rotational error through patented roller arrangement technology.

High rigidity and high load-bearing capacity: Cross roller bearings can withstand complex loads from all directions simultaneously through the orthogonal arrangement of rollers. This design significantly improves the rigidity of the bearing in all directions and enhances its load-bearing capacity

Compact structure: IKO cross roller bearings adopt a compact structural design, which provides greater load-bearing capacity and rigidity in limited space through the orthogonal arrangement of rollers. This makes them particularly suitable for situations that require high precision and compact design

Widely used: This type of bearing is widely used in various industrial fields, such as industrial robots, machining centers, medical equipment, precision instruments, etc. Due to their high rigidity and precision, they perform well in applications that require high stability and precision

Easy installation and maintenance: The inner and outer rings of IKO cross roller bearings are usually designed as a single unit, which makes installation and maintenance easier. In addition, the bearing clearance can be adjusted to maintain high-precision rotational motion even under preloading

Long term stability: Due to the structural design of cross roller bearings, they perform well in long-term use, providing stable performance and accuracy, and are suitable for situations that require high stability and long-term use

1. IKO crossed roller bearingsStructural Innovation

1.1 Roller Configuration

90° Cross Arrangement:

Alternating roller axes at right angles (X-pattern)

Roller diameter range: Φ2-Φ20mm

Roller length/diameter ratio: 1.5:1 to 4:1

Preload Systems:

Negative clearance: 0-50μm adjustable

Four preload grades:

1.2 Component Engineering

Split Inner/Outer Rings:

45° split angle for tool-less assembly

Match marking tolerance: ±0.5μm

Roller Guidance:

Integral V-grooves (60° contact angle)

Surface roughness: Ra ≤0.05μm (mirror-finished)

Cage Designs:

2. IKO crossed roller bearingsPerformance Specifications

2.1 Load Capacity

Note: Values based on ISO 14728-1 standard

2.2 Precision Parameters

Rotational Accuracy:

Radial runout: ≤3μm (P4 grade)

Axial runout: ≤2μm

Friction Characteristics:

Starting torque: 0.05-0.3 N·m

Running torque: 0.02-0.15 N·m

Stiffness:

Radial stiffness: 500-2,000 N/μm

Tilt stiffness: 10,000-50,000 N·m/rad

3. Material Science

3.1 Metallurgical Excellence

Raceway Material:

Vacuum-degassed SUJ2 steel (HRC 60-64)

Alternative: Silicon nitride (Si₃N₄) for non-magnetic applications

Surface Engineering:

Superfinishing with 3μm diamond paste

Black oxide coating (Fe₃O₄, 2-4μm thickness)

DLC (Diamond-Like Carbon) coating (μ=0.02-0.05)

3.2 Lubrication Systems

Standard Grease:

Kluber Isoflex NBU15 (60% base oil retention at 10⁶ cycles)

Operating range: -40°C to +120°C

High-Performance Options:

4.IKO crossed roller bearings  Application-Specific Solutions

4.1 Robotics Rotary Joints

7th Axis Applications:

Backlash: ≤0.001°

Moment stiffness: ≥45,000 N·m/rad

Integrated encoder mounting (17-bit resolution compatible)

4.2 Medical CT Gantries

Low Noise Operation:

Vibration: ≤15 μm/s RMS

Non-magnetic versions (μ<1.05)

Cleanroom assembly (ISO Class 3)

4.3 Semiconductor Steppers

Ultra-High Vacuum (UHV) Models:

Outgassing rate: <5×10⁻¹¹ Torr·L/s·cm²

Bake-out capability: 150°C @ 10⁻⁸ Pa

Material certification: SEMI F47 compliant

5. Mounting & Maintenance

5.1 Installation Protocol

Mounting Surface Requirements:

Bolt Torque Formula:

T = K × d × F

(T: torque [N·m], K: friction factor [0.12-0.18], d: bolt diameter [mm], F: preload [kN])

5.2 Lifecycle Management

L10 Life Calculation:

L₁₀ = (C/P)¹⁰/₃ × 10⁶ revs

(C: dynamic load rating, P: equivalent dynamic load)

Condition Monitoring:

6.Quality Assurance of IKO crossed roller bearings

Manufacturing Tolerances:

Testing Regimen:

100% torque consistency testing (±5% tolerance)

500-hour accelerated life test @ 120% rated load

Thermal cycling (-55°C ↔ +150°C, 50 cycles)

7. Competitive Advantages

8. Customization Capabilities

Geometric Modifications:

Flange integration (ISO 9409-1)

Counterbored mounting holes

Custom seal configurations (IP68/IP69K)

Smart Features:

Embedded strain gauges (±1με resolution)

Wireless temperature sensors (Bluetooth 5.0)

RFID-based service life tracking