Why Is the Escalator Handrail Speed Not Synchronized with the Steps?
During escalator operation, the escalator handrail should maintain the same speed as the steps to provide stable support for passengers. If the handrail speed is significantly faster or slower than the steps, passengers may feel a pulling sensation when holding the handrail, and in severe cases, it may affect their balance and safety. Therefore, handrail speed mismatch is an important abnormal condition that should be carefully checked during escalator maintenance.
1. Worn Friction Wheel Causes Handrail Slippage
The escalator handrail is usually driven by a friction wheel or drive wheel. When the friction wheel surface becomes worn, hardened, cracked, or contaminated with oil, the friction coefficient decreases. As a result, the handrail cannot receive enough driving force, causing:
Reduced handrail speed;
Slippage during startup;
Speed fluctuation under heavy loads.
Solution:Check the friction wheel surface wear, rubber hardness, and diameter changes. Replace the friction wheel if necessary and clean the drive area to restore proper transmission performance.
2. Insufficient Tension Affects Transmission Efficiency
Insufficient handrail tension reduces the contact pressure between the handrail and the drive wheel, lowering transmission efficiency. On the other hand, excessive tension may increase wear on rollers, guide wheels, and the handrail itself.
During maintenance, technicians should inspect:
Handrail tensioning device;
Pressure rollers;
Guide rollers;
Return section operation condition.
Ensure that the handrail force distribution is balanced and stable.
3. Handrail Misalignment Causes Local Friction
Escalator handrail deviation changes the contact position between the handrail, guide rails, and drive wheels, increasing local friction.
Typical symptoms include:
Unstable handrail speed;
Edge wear on the handrail;
Scraping noise near the entrance area;
Abnormal operating sounds.
Inspection recommendations:
Check the guide wheel angle, pressure roller position, handrail entrance device, and guide rail alignment to prevent long-term misalignment from damaging the handrail edges.
4. Aging or Internal Wear of the Handrail
After long-term operation, the internal fabric layer or steel structure of the handrail may deteriorate. The friction surface may become hardened or slippery, causing unstable power transmission.
Even if there are no obvious cracks on the outside, speed synchronization problems may still occur.
If the handrail shows signs such as:
Slipping;
Cracking;
Bulging;
Internal layer damage;
it should be replaced with a matching model in time.
5. Handrail Speed Inspection and Maintenance Recommendations
Maintenance technicians should use speed measurement equipment to separately test the step speed and handrail speed, then determine whether the difference exceeds the allowable range.
If abnormal speed is detected, the inspection should cover:
Friction wheel condition;
Tensioning system;
Guide rollers;
Handrail condition;
Drive system.
The problem should not be solved only by adjusting tension, as the root cause may come from other components.
6. Escalator Parts Purchasing Recommendations
When purchasing escalator handrails and related escalator parts, confirm the following parameters:
Handrail model;
Cross-section size;
Length;
Material;
Color;
Drive method;
Compatible escalator brand and model.
Related components such as friction wheels, guide rollers, pressure rollers, and tensioning devices should also be properly matched to prevent speed problems after installing a new handrail.
A-FLY Elevator & Escalator Parts Supply Capability
As a professional elevator and escalator parts supplier, A-FLY provides global maintenance companies, engineering companies, and spare parts distributors with:
Guide rollers;
Pressure rollers;
Tensioning devices;
And various elevator & escalator spare parts.
A-FLY supports model matching, OEM/ODM customization, bulk supply, and fast delivery, helping customers improve escalator maintenance efficiency and reduce downtime risks.
Conclusion
Escalator handrail speed synchronization problems are usually related to friction wheel wear, improper tension, handrail misalignment, and handrail aging.
Maintenance technicians should conduct a systematic inspection of the drive system, guiding system, tensioning system, and handrail condition. By replacing reliable escalator parts in time, the escalator can maintain safe, stable, and long-term operation.
