Keyway Calculator ISO 773 | Free Tool #074

Published by Nikolai Shelkovenko on

Free Engineering Tool #074

Keyway Calculator — ISO 773

Design keyways per ISO 773 / DIN 6885. Enter shaft diameter and torque to find standard key size and check bearing and shear stresses.

ISO 773Stress CheckAuto-Calc
Quick presets

Results

Standard Key (w × h)
—
Tangential Force
—
Shear Stress
—
Bearing Stress
—
SF (Shear)
—
SF (Bearing)
—

Tangential Force

Shear Stress in Key

Bearing Stress

Standard Key Sizes (ISO 773 / DIN 6885)

Shaft d (mm)Key w×h (mm)
6–82×2
8–103×3
10–124×4
12–175×5
17–226×6
22–308×7
30–3810×8
38–4412×8
44–5014×9
50–5816×10
58–6518×11
65–7520×12
75–8522×14
85–9525×14

Key length = 1–1.5× shaft diameter. Check stress concentrations at keyway corners (Kt=1.5–2.5).

Shaft Diameter Press Fit Spline Connection Shaft Deflection
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