Tubular, side-mounted or centre-mounted? Learn the main rolling shutter motor types, how to size them, and what to check for a long-lasting automatic shutter.
Converting a manual rolling shutter to automatic, or buying a new motorised shutter, starts with one key choice: the motor. The right motor makes the shutter smooth, safe and reliable for years. The wrong one strains under load, overheats or fails early. This guide explains the common motor types and how to choose.
| Motor type | How it works | Typical use |
|---|---|---|
| Tubular motor | Fits inside the shutter barrel, compact and hidden | Smaller, lighter shutters such as shops and homes |
| Side-mounted motor | Mounted at the side of the shutter, drives the shaft through a chain or direct coupling | Medium to large commercial and industrial shutters |
| Centre-mounted motor | Fitted in the middle of the shaft, balances the load across the width | Wide shutters where even lifting matters |
The motor must lift the full weight of the shutter curtain with a safety margin. Shutter weight depends on width, height, slat material and thickness. A galvanised steel shutter weighs much more than an aluminium one of the same size. Your supplier should calculate the curtain weight and select a motor rated above it, rather than choosing a motor by size alone.
Smaller shutters usually run on single-phase power. Large industrial shutters often use three-phase motors, which handle heavy loads and frequent operation better. Check the power supply available at the site before finalising the motor.
A shop shutter that opens twice a day has very different needs from a warehouse shutter that opens dozens of times. For frequent use, choose a motor with a suitable duty rating so it does not overheat. Repeated overheating is one of the most common causes of early motor failure.
In many cases yes, if the shutter is in good condition. A technician checks the curtain, shaft and guides, then fits a suitable motor and controls.
There is no single best motor. Tubular motors suit small shutters, while side-mounted and centre-mounted motors suit larger and heavier shutters. The right choice depends on shutter weight, size and usage.
Most motors include a manual override such as a chain or crank. A UPS or battery backup can also keep the shutter working during short outages.
Life depends on correct sizing, usage frequency, installation quality and maintenance. A properly sized motor with regular servicing lasts much longer than one that is overloaded.
Looking to automate your rolling shutters? Rudhar can assess your shutter and recommend the right motor and safety setup for your site.
