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The product of load and reach, transferred into the floor at the base of a pillar-mounted unit. It determines design, pillar section and anchoring – and matters more than payload alone: 60 kg at 4 m is more demanding than 120 kg at 1.5 m.
The tilting moment is the weight of the load times its horizontal distance from the axis of rotation: M = m · g · a. Here m is the mass in kilograms, g the acceleration due to gravity of 9.81 m/s² and a the outreach in metres. The result is in newton metres.
60 kg at 4 m outreach gives 60 · 9.81 · 4 = 2,354 Nm. 120 kg at 1.5 m gives 1,766 Nm. The lighter load therefore stresses pillar and floor by a third more – because it hangs further out.
The load is only one part. Every component hanging beside the axis of rotation contributes a moment of its own: the jib with its centre of gravity roughly at half its length, the hoisting unit at its position, the gripper at the far end. The total moment is the sum of all masses times their respective distances.
Dynamic effects from lifting, braking and slewing come on top. The manufacturer accounts for them in the design with factors; they do not enter an operator’s rough calculation. The rough figure is therefore a value for comparison, not a proof.
On a pillar-mounted unit the moment runs through the jib into the pillar, from there into the base plate and through the anchors into the floor. Each station must be able to take it. On wall-mounted units the moment becomes a force couple at the brackets: tension out of the wall at the top, compression at the bottom.
The weakest station is often not the unit but the ground. The concrete grade, slab thickness and edge distances required follow from the approval of the anchors and the manufacturer’s foundation drawing. If the hall floor is not sufficient, the options are a separate foundation, a larger base plate or a different design.
On firmly anchored units the tilting moment is a load on structure and fixing. On mobile units with a chassis or counterweight it decides whether the unit tips over: the stabilising moment from dead weight and footprint must exceed the tilting moment with a margin. Mobile units therefore usually have a shorter outreach, or a capacity that falls as the outreach increases.
What Entracon offers here is on the matching page.
See what we offer| Load | Outreach | Moment |
|---|---|---|
| 50 kg | 2.0 m | 981 Nm |
| 80 kg | 2.5 m | 1,962 Nm |
| 120 kg | 1.5 m | 1,766 Nm |
| 60 kg | 4.0 m | 2,354 Nm |
| 100 kg | 3.0 m | 2,943 Nm |
| 150 kg | 4.0 m | 5,886 Nm |
Because it combines load and reach. Two units with the same capacity can differ several times over in moment – and therefore in pillar section, anchoring and floor requirements.
Roughly, yes: mass times 9.81 times outreach, for load and gripper. For sizing the anchoring and foundation, the manufacturer’s figure governs, which includes dead weight and dynamic factors.
Options are a separate foundation, a larger base plate to spread the load, fixing to a wall or column, or an overhead rail system that carries the load without a tilting moment at floor level.
One short conversation usually settles more than three quotations. Call or write — you will reach an engineer directly.
Start typing – for example “balancer”, “SAP” or “pipe stress”.
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