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Tool Holder Balance Calculator
Decision Tools
Tool Holder Balance Calculator
Free engineering calculator - no signup, runs in your browser.
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DEW Machine Shop Tools
Tool Holder Balance Calculator
Inputs
Balance Quality Grade (ISO 1940)
G1.0 — precision / HSC spindles
G2.5 — high-speed tool holders
G6.3 — general machine tooling
G16 — standard / lower speed
G40 — coarse
Assembly Mass (kg)
Max Operating Speed (rpm)
Measured Unbalance (g·mm)
From your balancing machine; leave 0 to skip the pass/fail check
CALCULATE
Readout
PERMISSIBLE UNBALANCE
—
g·mm
MAX SAFE SPEED
—
rpm
SPECIFIC UNBALANCE eₛₖₕ
—
µm
—
Per ISO 1940-1. Unbalance limits tighten with rpm — balance to the highest speed the holder will actually run.
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