China Best Airport Escalator Spare Parts Supplier?

Spare Part	Primary Function	Common Materials or Construction	Typical Airport Application	Inspection Focus	Replacement Considerations
Escalator Steps	Carry passengers between different floor levels while maintaining a continuous, interlocked walking surface.	Die-cast aluminium or formed metal with longitudinal grooves and yellow step demarcation lines.	Terminal halls Concourse links Baggage areas	Cracks, deformation, missing demarcation lines, damaged rollers, abnormal noise, and correct step alignment.	Match step dimensions, axle spacing, roller position, groove pattern, and system configuration before ordering.
Step Rollers	Guide and support each step along the track system and help reduce rolling resistance.	Steel or engineered polymer wheels with sealed or shielded bearings, depending on the assembly design.	High-cycle escalators operating continuously during passenger peak periods.	Flat spots, bearing noise, excessive play, uneven rotation, heat, and track contact marks.	Replace worn rollers in accordance with the maintenance schedule and inspect the associated axles and tracks.
Step Chain	Connects the steps and transfers drive force through the escalator loop.	Precision-manufactured alloy-steel links, pins, bushings, and rollers with corrosion-resistant lubrication requirements.	Long-rise installations and heavily used terminal escalators subject to frequent load cycles.	Elongation, stiff links, corrosion, inadequate lubrication, abnormal vibration, and uneven tension.	Use the correct pitch, link arrangement, roller dimensions, and rated load; chain replacement normally requires alignment checks.
Drive Chain	Transfers torque from the gearbox or drive output to the step-chain sprocket or main drive assembly.	Industrial roller-chain construction using hardened steel links, pins, bushes, and rollers.	Escalators and moving walks with high daily operating hours.	Chain elongation, sprocket wear, excessive slack, lubrication condition, vibration, and unusual mechanical noise.	Replace the chain and inspect sprocket tooth profiles when elongation or wear exceeds the equipment manufacturer’s limits.
Drive Sprocket	Engages the drive chain or step chain and converts rotational motion into step movement.	Machined or forged alloy steel, often with a hardened or treated tooth surface.	Drive stations exposed to repeated starting, stopping, and passenger loading cycles.	Hooked or sharpened teeth, uneven wear, cracks, runout, loose keys, and incorrect chain engagement.	Confirm tooth count, pitch, bore, keyway, rotation direction, and shaft dimensions before replacement.
Handrail Belt	Provides passengers with a moving handhold synchronized with the escalator steps.	Multi-layer elastomer construction with internal reinforcement and a low-friction guide surface.	Public-facing areas where hygiene, passenger comfort, and continuous availability are important.	Cracks, glazing, stretching, surface cuts, tracking problems, speed mismatch, and excessive tension.	Verify belt length, profile, guide dimensions, direction of travel, and compatibility with the handrail drive system.
Handrail Drive Wheel	Maintains handrail movement and helps synchronize the handrail speed with the steps.	Rubber-coated or high-friction polymer wheel mounted on a metal hub or drive assembly.	Escalators with long handrail paths or intensive daily passenger use.	Surface hardening, slipping, uneven wear, bearing noise, poor tracking, and speed deviation.	Inspect the wheel, pressure setting, guide rollers, and handrail condition together rather than replacing only one worn component.
Comb Plate	Bridges the transition between the moving steps and the landing floor while reducing the gap at the landing.	Cast or machined aluminium, stainless steel, or other approved metal with replaceable comb teeth.	Boarding and exiting points of terminal escalators and moving walks.	Broken or bent teeth, incorrect clearance, loose fasteners, contamination, and damaged yellow warning markings.	Use the correct tooth profile and landing geometry; comb impact devices must be tested after installation.
Comb Impact Safety Device	Detects excessive force or obstruction at the comb area and initiates a safety stop.	Mechanical trigger assembly with electrical switching elements and adjustable mounting hardware.	High-traffic landings where footwear, luggage, or foreign objects may reach the comb area.	Correct activation force, switch response, reset operation, wiring condition, and secure mounting.	Functional testing is required after replacement; never bypass the device during normal operation.
Skirt Panel	Forms the side boundary beside the steps and helps prevent access to internal moving components.	Stainless steel, coated steel, or other rigid metal panels with smooth, cleanable surfaces.	Passenger-facing areas requiring durability, cleanability, and resistance to frequent contact.	Dents, sharp edges, corrosion, loose fixings, excessive step-to-skirt clearance, and surface contamination.	Check panel thickness, curvature, fixing locations, finish, and required clearance from the steps.
Skirt Deflector Brush	Creates a visual and physical boundary that discourages passengers from placing footwear or objects against the skirt.	Flexible nylon or similar synthetic bristles fixed to an aluminium or polymer carrier.	Passenger escalators in busy terminals, transfer corridors, and public concourses.	Missing bristles, loose carrier sections, contamination, poor alignment, and interference with steps.	Confirm brush height, carrier profile, fixing method, and continuous coverage along the required skirt section.
Balustrade Panel	Provides a transparent or solid barrier beside the handrail and protects passengers from moving mechanisms.	Tempered safety glass, laminated safety glass, or approved transparent polymer panels with metal supports.	Terminal interiors where visibility, passenger guidance, and architectural integration are required.	Chips, cracks, loose clamps, damaged seals, panel movement, and incorrect edge clearances.	Confirm thickness, dimensions, hole positions, edge treatment, safety-glazing specification, and support hardware.
Emergency Stop Button	Allows passengers or authorized personnel to stop the escalator quickly during an emergency.	Red latching push button with a protective bezel and electrical contact block.	Accessible at escalator entrances, exits, and other locations specified by the safety design.	Visibility, accessibility, latching action, contact operation, reset procedure, labels, and enclosure condition.	Test the complete stop circuit and reset sequence after replacement; use the approved contact arrangement.
Safety Switches	Monitor conditions such as overspeed, broken drive components, access-panel opening, step loss, or handrail entry obstruction.	Industrial electromechanical switches, proximity sensors, or position switches with protected cabling.	Safety circuits throughout the truss, drive station, landing, skirt, and handrail entry zones.	Actuator position, contact continuity, cable damage, corrosion, false trips, and correct fail-safe operation.	Identify the monitored function and contact logic before installation; test the safety circuit under controlled conditions.
Gearbox Seals and Bearings	Maintain lubricant containment and support rotating shafts inside the drive transmission.	Oil-resistant elastomer seals and precision rolling bearings selected for the gearbox design.	Drive units operating for extended periods with frequent starts, stops, and changes in passenger load.	Oil leakage, temperature rise, vibration, unusual sound, shaft play, and lubricant contamination.	Confirm shaft size, seal profile, bearing clearance, lubricant type, and alignment requirements before service.
Controller and Relay Components	Manage motor starting, stopping, monitoring, fault handling, lighting, and communication with safety circuits.	Electrical control modules, relays, contactors, terminal blocks, sensors, and protected wiring assemblies.	Airport facilities requiring reliable operation, fault indication, and integration with building maintenance procedures.	Loose terminals, overheating, contact wear, insulation damage, fault codes, and correct input/output signals.	Match voltage, current rating, control logic, terminal layout, enclosure requirements, and approved software configuration.
Step Demarcation Inserts	Improve visual awareness of step edges and help passengers identify the boundaries of each moving step.	High-visibility yellow polymer or approved coating integrated into or attached to the step surface.	Boarding and exit zones with heavy passenger flow and varied lighting conditions.	Fading, peeling, missing sections, contamination, poor contrast, and damage caused by cleaning equipment.	Use a compatible insert or coating that does not create a raised edge or interfere with step clearances.