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Escalator Components — Frequently Asked Questions
What are the most frequently replaced escalator components during maintenance?
The highest-turnover escalator maintenance parts are step chain links and pins (replaced when elongation exceeds 2 % of nominal pitch per EN 115-1), comb plate segments (replaced when teeth are worn or broken), step demarcation strips (replaced when cracked or faded for visibility compliance), and step roller bearings (replaced when wear causes audible noise or step judder). Handrail surface compounds also wear and crack over 5–10 years under UV exposure and repeated flexing, requiring full handrail replacement.
How is step chain elongation measured and when does it require replacement?
Step chain elongation is measured by counting a fixed number of chain links (typically 10 or 20) and comparing the measured length to the nominal pitch multiplied by the link count. EN 115-1 specifies a maximum elongation of 2 % of nominal pitch before replacement is required. Excessive elongation causes the steps to lose their synchronisation with the comb plate teeth, risking entrapment and generating the characteristic rhythmic noise associated with a worn escalator chain.
Are Turkish escalator components compatible with major OEM brands?
Yes. Most Turkish escalator component manufacturers design their products to match the dimensional specifications of major OEM brands including Schindler, KONE, Otis, ThyssenKrupp, Mitsubishi, and Fujitec. Step chain replacement kits, comb plate segments, and handrail guide profiles are available with OEM cross-reference part numbers, simplifying procurement for maintenance contractors managing multi-brand escalator portfolios.
What lubrication systems are available for escalator step chains?
Automatic lubrication systems use a pump unit driven by the escalator machine or by a timer to deliver controlled quantities of chain lubricant through spray nozzles or wicking applicators positioned at the upper and lower chain return zones. EN 115-2 maintenance standard recommends lubrication intervals based on running hours rather than calendar time. Turkish suppliers offer manual spray lubricants, automatic drip-feed systems, and biodegradable H1-certified food-grade lubricants suitable for escalators in food retail and airport environments.