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The rotation radius of the operating platform of a mobile articulated boom lift is an important safety and design parameter-it tells you how much space the lift needs to swing when the boom and basket rotate around the chassis.
The rotation radius (sometimes called the tail swing radius) is the maximum horizontal distance from the centerline of the machine's turntable (rotation center) to the furthest point reached by the operating platform (basket or cage) during full rotation.
It includes both the basket itself and any guarding, rails, or attachments.
Boom length & articulation: Longer booms or multi-jointed arms swing further out.
Platform dimensions: A larger basket increases radius.
Mounting offset: If the basket is not centered on the boom, its offset increases the rotation radius.
Chassis design: Some lifts have zero-tail swing, while others have a counterweight that extends beyond the base when rotating.
Measurement Method：
1. Place the boom lift on a flat surface.
2. Rotate the upper structure (turntable) a full 360° with the boom in its transport/stowed position.
This determines the tail swing radius (clearance behind).
3. Extend the boom to its maximum working outreach (horizontal reach).
4. Rotate the turntable again, observing the farthest horizontal distance from the center of rotation to any point of the platform.
The largest measured value is the operating platform rotation radius.
Why It Matters
Site planning:
Ensures enough clearance when working near walls, poles, or other equipment.
Transport/storage: Determines space needed for loading and parking.
Safety: Prevents collision of the platform or counterweight during rotation.
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