QS640250100 is a gearless elevator traction machine from the QUIET SERIES GEARLESS family, configured for 2500 kg capacity at 1.00 m/s rated car speed. Its Ø400 * 8 x Ø10 traction arrangement and 21,00 kW motor power provide a balanced combination of starting torque, ride comfort and installation flexibility for professional elevator projects.
QS640250100 is a Turkish-origin gearless elevator traction machine from the QUIET SERIES GEARLESS range, selected for projects requiring a reliable machine-room or traction-drive solution. With a rated car speed of 1.00 m/s, a nominal capacity of 2500 kg, 21,00 kW motor power and operating current of 52,0, this configuration is suitable for professional lift packages where precise capacity matching and stable mechanical performance are essential. The machine can be evaluated for classic machine-room installations and, in the case of gearless QS configurations, for compact traction layouts that require efficient torque transmission and low vibration behavior.
The body architecture is designed around robust elevator-duty mechanical components, a durable traction sheave and a rope set specified as Ø400 * 8 x Ø10. This combination allows the designer to match the traction system to the shaft, counterweight and car load profile. The frame and mechanical layout are intended to support easy handling during installation, clean rope alignment and practical access to the brake and service points. For VVVF geared machines, the reduction ratio project-specific supports torque multiplication and stable acceleration. For gearless models, the direct-drive arrangement reduces mechanical losses and improves long-term ride quality.
From a performance perspective, the motor is intended for inverter-controlled elevator operation and should be paired with a properly tuned VVVF drive. In modern projects, motors of this class are commonly specified with high-efficiency designs such as IE3 or equivalent project-grade efficiency, depending on the final motor declaration and certification. The result is improved energy use, controlled acceleration, accurate leveling and reduced vibration. Parameters such as 21,00 kW power, 52,0 current and 1.00 m/s rated speed should be considered together with the cabin mass, counterweight balance and duty cycle to optimize ride comfort.
Safety and maintenance are central to this machine selection. The brake system must hold the elevator safely under rated load, while routine inspections should include brake air gap, lining condition, rope wear, sheave groove condition, lubrication points on geared units and encoder or feedback integrity on VVVF systems. Correct maintenance intervals help preserve torque response, reduce noise and protect the traction interface. This model is suitable for residential buildings, commercial projects, hospitals, public buildings and medium- to heavy-duty passenger or service elevators, depending on the final capacity, roping ratio and travel height requirements.
