Drilling is a method to remove mass on the side of the unbalance. VM-BAL calculates angle positions, depth and number of drillings.
![1](drex_bullet_1.png) Maximum number of drillings
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Up to 3 equal drillings are allowed to increase the amount of removed material
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![2](drex_bullet_2.png) Maximum depth
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![3](drex_bullet_3.png) Drill diameter
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![4](drex_bullet_4.png) Drill point angle
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![5](drex_bullet_5.png) Material density
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The density of the removed rotor material is needed to calculate the removed mass.
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