The Honest Numbers on Motor Life
Motor lifespan is where automatic door quality shows itself most clearly. A brushless DC (BLDC) motor on a properly maintained door routinely delivers 10 to 15 years of daily commercial service — millions of open-close cycles. The brushed DC motors in budget systems tell a different story: carbon brushes wear, heat builds, and 3 to 5 years is a common life in Malaysian high-traffic use.
That gap is why automatic sliding doors from GW GeWalt run a 100W BLDC motor as standard. No brushes means no brush wear, cooler running and consistent torque across the motor’s whole life. Our guide on how automatic sliding doors work shows where the motor sits in the drive chain.
Duty Cycle: The Spec Most Buyers Never Check
Duty cycle describes how much of the time a motor can run without overheating. A 15% duty-cycle motor is built for occasional residential use; run it at a busy shopfront and it cooks itself within a couple of years. Continuous-duty (100%) motors are engineered to cycle all day, every day, without a thermal ceiling.
Ask this before you sign any quotation
“What is the motor’s duty cycle, and what is its per-leaf weight rating?” Any supplier of serious equipment answers instantly. Hesitation usually means a residential-grade motor is being quoted for commercial work.
Weight rating matters for the same reason. A motor rated to 200kg per leaf, driving 120kg leaves, spends its life loafing. A 100kg-rated motor driving the same leaves spends its life at redline. Headroom is longevity.
What Actually Shortens Motor Life
In our repair work across the Klang Valley, motors rarely die of old age. They die of overload, and the overload almost always starts elsewhere:
- Worn rollers drop the leaf onto the track, and the motor drags it instead of gliding it
- Misaligned or dirty tracks add friction on every cycle
- Loose belts slip and shock-load the drive
- Skipped servicing lets all three of the above compound quietly
This is why motor life and maintenance are the same conversation. A door serviced on the right service schedule keeps its rollers, track and belt within spec, and the motor never sees the loads that kill it.
The warning signs of a motor nearing the end are audible and visible: laboured or slowing opening, a hot header cabinet, humming without movement, or intermittent stalls on hot afternoons. Any of these deserves a diagnosis visit before the failure strands your entrance shut.
If your door’s motor is fading — or you want the duty-cycle question answered for a new installation — send us the details on WhatsApp. Diagnosis is on-site, quotations are free, and a motor replacement is far cheaper than a jammed doorway on a busy morning.