Gate Automation › Motor Sizing
Gate Motor Torque Calculator
Find the minimum motor torque and suggested motor class for swing and sliding automated gates. Accounts for gate weight, width and driveway slope.
Gate Motor Torque Sizing Calculator
Enter gate type, weight and width to calculate required motor torque.
Swing gate: friction force × arm length. Sliding gate: rolling friction + slope force × pinion radius (25 mm). Always confirm motor sizing with manufacturer specifications and AS 5744 gate safety standard.
Frequently Asked Questions
What is the difference between a swing and sliding gate motor?
Swing gate motors (arm or underground actuators) rotate the gate leaf on a pivot. Sliding gate motors drive a rack-and-pinion mechanism along a guide rail. Torque calculations differ: swing uses rotational torque; sliding uses linear force converted to motor torque via pinion radius.
How do I find the weight of my gate?
Contact the fabricator or measure the infill area and multiply by the material density. Typical values: tubular steel 15–25 kg/m², solid steel plate 40–50 kg/m², aluminium slat 8–12 kg/m², timber 20–30 kg/m².
What standards apply to automated gates in NZ?
AS 5744 (Gate safety) and the relevant parts of AS/NZS 61000 apply. All automated gates must have safety features including photo-beams, pressure sensing and emergency release per the standard.
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