🔑 Keys & Keyways DIN 6885

Parallel key dimensions (Form A) per DIN 6885 — surface pressure and shear check

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Shaft & Key

b × h—key cross-section [mm]
t₁ (shaft)—keyway depth [mm]
t₂ (hub)—keyway depth [mm]
d range—shaft diameter [mm]
mm
6 – 500 mm
N·m
mm
Nominal length (Form A)

Results

DIN 6885 Form A — Full table

d range [mm] b [mm] h [mm] t₁ [mm] t₂ [mm] l min [mm] l max [mm]

Background

Surface pressure (otlačení)

The key bears against the hub keyway wall. Effective contact area on the hub side: