TR Get a Quote

Balance Weight Splitting Calculator

On a fan, weights can only go on the blades; on a balancing disc, only in the holes. When the calculated correction falls between two positions, it is split between the two neighbours so that the effect is the same.

Hole 1 is at 0°; angles and hole numbers increase in the same direction. All weights are assumed to sit on the same radius.

Split weights — g + — g
First position
—
Second position
—
Total mass fitted
— g
Extra mass
—

These tools are intended for preliminary assessment and training. Decisions on critical equipment should be based on on-site measurement and expert evaluation.

How to use

  1. Enter the correction weight and angle from your balancing calculation.

  2. Enter the number of blades or holes; position 1 is taken as 0°.

  3. Fit the two resulting weights at the positions shown, on the same radius.

Theory & formulas

The angle between neighbouring positions is Δ = 360°/N. If the target angle α lies θ1 from the lower and θ2 from the upper position:

m1 = m·sin(θ2)/sin(Δ), m2 = m·sin(θ1)/sin(Δ) (law of sines). The two vectors add up exactly to the target.

Splitting always needs slightly more total mass; the further apart the positions, the larger the difference.

Frequently asked questions

What if the radii differ?

What counts is mass × radius. Scale a weight fitted on a different radius by r<sub>calc</sub>/r<sub>actual</sub>.