Flat Round Air Bearings

Multiple size, load and mounting options with application-specific selection and customization

Flat Round Air Bearing Ø60 mm — Overview

Flat round air bearings use compressed air to form a stable film between the bearing face and guide surface, enabling contactless support and low-friction motion. Their smooth operation, low vibration, minimal wear and high cleanliness make them suitable for supporting and guiding precision motion stages, with selection and customization available for different applications.

Fanlin Tech provides air-bearing selection and customization for different payload, stiffness, mounting and material requirements. Air supply, port, flatness and system-level accuracy parameters must be confirmed against the datasheet and technical agreement.

Contactless Air-Film Support

Compressed air forms a film for low-friction, low-vibration contactless support and motion

High Stiffness

Optimized air-film and structural design provides stable support, reduces deflection under load and improves precision-motion stability

Zero Friction & Wear

Contactless air-bearing operation reduces mechanical wear and particle generation for clean precision equipment

Compact Design

The compact form simplifies integration into space-constrained precision stages

AOI Inspection Platforms

Low-friction support and precision guidance for automated optical inspection stages

Semiconductor Equipment

Wafer handling, die bonding, and inspection stages requiring ultra-clean, particle-free environments

Precision Motion Stages

Multi-axis precision stage support for laser processing, scanning and metrology equipment

Optical Scanning

Contactless motion systems for interferometry, optical inspection and scanning stages

Series Overview

Flat Round Air Bearing Product Line

The series spans Ø29–Ø304 mm bearing outside diameters and stable loads from 72–16,000 N for different envelope, load, and integration requirements. Select a model to view its complete technical specifications below.

Detailed Specifications

AB-CI50-MC02

54 mm

Parameter	AB-CI50-MC02
Bearing Outside Diameter	54 mm
Stable Load	300 N
Stiffness	52 N/μm
Air Flow	0.90–1.50 NLPM
Ball Socket	13 mm
Bearing Height	13 mm
Bearing Weight	0.06 kg
Rated Input Pressure	0.41 MPa
Fly Height	5 μm
Housing Material / Finish	Aluminum / Anodized
Porous Media Material	Porous Ceramic
Porous Bearing Face Diameter	Ø50 mm
Face Flatness	0.0005 mm
Pressure Port Thread	M5 × 0.8
Viable Pressure Range	0.414–0.552 MPa
Maximum Allowable Supply Pressure	0.689 MPa
Maximum Speed	45 m/s
Common Guide Surfaces	Granite, hard-coated aluminum, ceramics, glass, stainless steel, plated steel
Suggested Guide Surface Finish	16 RMS

Rated at 0.41 MPa (60 psi) supply pressure with a reference 5 μm air gap. Load, stiffness and flow figures are for selection guidance; final values are subject to the Fanlin Tech datasheet and technical agreement.

Rail material, surface roughness and flatness must be engineered against payload, travel and accuracy targets. Confirm them in the matching datasheet and technical agreement.

Bearing count and layout depend on total payload, moments, stage dimensions, target stiffness and safety factor; they cannot be fixed from travel alone. Engineering load and stiffness checks are required.

An air bearing depends on continuous air supply to maintain its film. Critical systems should use pressure monitoring, alarms and interlocks, with loss-of-air behavior defined by the machine safety design.

Yes. Fanlin Tech offers customization for load capacity, stiffness, mounting configurations, and material options. Please contact our engineering team with your specific requirements.

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