Sliding Gate Motor Buying Guide

A sliding gate motor is the single most important component in a gate automation system, and the wrong choice shows up as a motor that overheats in summer, stalls in monsoon, or fails after two years. This guide walks through the five decisions that determine the right operator.

1. Start with gate weight

Every sliding gate motor is rated for a maximum gate weight. This is the number to work from — not the gate length, not the opening width.

If the gate cannot be weighed, estimate it:

Gate construction	Approximate weight per m²
MS box-section frame with vertical bars	25–35 kg
MS frame with 1.6 mm sheet cladding	40–50 kg
MS frame with 2 mm sheet + design work	55–70 kg
Heavy industrial (50×50×3 mm sections, double sheet)	80–110 kg

Multiply by the leaf area (length × height), add 10% for hardware, and then add a 20–30% margin before choosing a motor. A 4 m × 1.8 m sheet-clad gate at 45 kg/m² weighs roughly 325 kg + 10% ≈ 360 kg; with a 25% margin you would specify a motor rated for at least 450 kg. Compare that figure against the rated gate weight of each operator in the Rollvento sliding gate range, and pick the first one above it.

Cantilever gates put more load on the pinion because the counterbalance section adds weight and the gate does not rest on rollers. Treat a cantilever gate as one capacity class heavier.

2. Choose the supply type

Criterion	24 V DC	220 V AC	Brushless DC (BLDC)
Typical capacity	500–800 kg	600–2000 kg	500–1000 kg
Battery backup	Yes	Not normally	Yes
Soft start / stop	Yes	Basic	Yes, variable speed
Obstacle detection	Electronic, precise	Mechanical / current-based	Electronic
Duty cycle	Residential – commercial	Industrial, continuous	High-cycle commercial
Best for	Villas, societies, offices	Factories, logistics gates	Busy entrances needing speed

For most homes and housing societies, 24 V DC is the right answer: quiet, safe low voltage at the gate, and the gate keeps working through power cuts. Choose AC when the gate is heavy or cycles all day. Choose brushless when speed matters, and compare the rated opening speeds across the sliding gate range.

3. Check gate length and speed

Opening time = gate length ÷ motor speed. A 6 m gate at 16 m/min takes about 22 s to open fully; a 10 m gate takes about 37 s. If vehicles queue, that delay becomes a problem. Options are a faster motor, or a partial-opening (pedestrian) function for foot traffic.

Long gates also need enough rack: allow gate length plus 0.5 m for run-off, in 1 m sections.

4. Decide the limit type

Travel limits tell the motor where to stop.

• Mechanical spring limits — a lever on the motor hits stops on the rack. Simple and cheap; fine for clean residential sites.
• Magnetic limits — magnets on the rack trigger a sensor. Immune to dust and water; recommended for dusty or coastal sites.
• Electronic limits (encoder) — the board counts pinion rotation. Most precise; allows slow-down zones and easy re-programming.

5. Match the duty cycle

Duty cycle is how often the motor runs. A residential gate opening 20 times a day is a light duty. A society entrance opening 300 times a day, or a logistics gate that cycles every few minutes, will overheat a residential motor. Rollvento’s AC industrial models and brushless units are built for continuous duty; the product page for each model states its intended use.

Accessories that are not optional

• Gear rack — Module 4 for all Rollvento sliding motors. Nylon-with-steel-core for residential; galvanised steel (8–22 mm) for heavier gates. See gear racks.
• Photocells — a pair across the opening, so the gate reverses if anything breaks the beam. See safety sensors.
• Warning lamp — visible from both approaches.
• Manual release key — supplied with the motor; keep it accessible.
• Remotes / keypad / GSM — as many command channels as users need.

Quick reference: Rollvento sliding gate motors

Model	Rated capacity	Supply	Notes
SL500DC	500 kg	24 V DC	Battery backup ready
SL500DCW	500 kg	24 V DC BLDC	High speed 22 m/min, ≤58 dB
SL800DC	800 kg	24 V DC	Battery backup ready
SL600AC / SL600ACL	600 kg	220 V AC	Mechanical / magnetic limits
SL1000AC	1000 kg	220 V AC	Commercial, Wi-Fi option
SL1500AC	1500 kg	220 V AC	Industrial, Wi-Fi option
SL2000AC	2000 kg	220 V AC	Heavy industrial, Wi-Fi option

Full specifications for each model are on the Sliding Gate Motors pages. If you are between two sizes, or the gate is unusual (very long, cantilever, on a slope), send the details to engineering before ordering.

Frequently asked questions