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Balancing Machine Sensitivity Calculator

Calculate minimum detectable unbalance (Umin) and achievable balance grade for soft or hard bearing balancing machines per ISO 21940-21 (formerly ISO 2953).

ISO 21940-21UminMalambot / Tibay na Bearing
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Results

Pinakamaliit na Matutuklas na Unbalance (Umin)
Residual Specific Unbalance (eper)
Achievable Balance Grade
Unbalance Reduction Ratio (URR)
Service Speed ω

Minimum Detectable Unbalance

Ang pinakamaliit na matutuklas na unbalance (Umin) ng isang balancing machine ay nakasalalay sa sensitivity ng sensor, electronic noise floor, at display resolution:

Achievable Balance Grade

Kung saan ang ω ay ang angular velocity sa service speed (hindi ang bilis ng pagbabalanse).

Praktikal na panuntunan: Umin should be well below the permissible residual unbalance (Uper) — typically no more than about 10% — so that measurement uncertainty does not dominate the result. Balancing machines themselves are described and evaluated per ISO 21940-21 (formerly ISO 2953), which defines the minimum achievable residual unbalance (Umar) and unbalance reduction ratio (URR) tests.

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