Products Description

A gearless HVLS fan removes the gearbox entirely: the permanent-magnet synchronous motor turns the large airfoil rotor directly, so there is no reduction stage to wear, leak or service. Because no gearbox sits between the motor and the ceiling structure, the required installation height is smaller, which matters in buildings with low roof pitch or steel beams close to the floor. The stepped motor shaft - larger at the bottom, smaller at the top - is an anti-drop design that stops the rotating part from falling, and the safety wire ropes plus high-strength bolts tie the whole set back to the roof beam.

Buyers who choose a gearless HVLS fan are usually trying to eliminate a maintenance point, not just a box on the spec sheet. That is why we lean on in-house R&D structural support and drawing-based manufacturing: when your beam spacing, hanging height or blade diameter falls outside a standard catalog entry, we adapt the clamped mount and anti-drop geometry to your drawings rather than forcing your site to accept a generic unit. Prototype and sample support is also available, so you can validate the mounting and airflow on one bay before committing to the full batch.

Specifications

Parameter	Specification
Transmission	Gearless direct drive, no gearbox
Blade diameter	2000–7300 mm
Blade count	5–8
Motor power	0.4–1.8 kW
Max speed	55–120 RPM
Air volume	2,560–15,000 m³/min
Coverage	50–920 m²
Power input	3-phase 380 V or single-phase 220 V, 50/60 Hz
Weight	28–128 kg

Applications

Low-height workshops

without a hanging gearbox, the fan can be clamped to roof beams as low as 4.5 m and still keep the rotating set clear of equipment below.

Maintenance-sensitive plants

no gearbox oil, gear wear or alignment checks mean fewer service stops in production environments where every downtime hour counts.

Multi-unit parallel bays

identical gearless units circulate together across adjacent production lines, with the same smooth sine-wave start on every fan.

Customization

OEM / ODM and private label; we build from your drawings or prototypes.
Blade diameter 2000–7300 mm, 5–8 blades, to match the open floor you are ventilating.
Input options: 3-phase 380 V or single-phase 220 V, 50/60 Hz, 1.5 kW / 750 W class.
Clamped mounting to roof structural beams with anti-drop stepped shaft and safety wire ropes.