Shaft Deflection & Critical Speed Calculator
Calculate maximum deflection, bending stress, and critical speed for rotating shafts. Toggle Show Work to see every formula step.
Shaft Details
mm
mm
Load & Support
N
mm
Results
Max Deflection
0.6561mm
Critical Speed
1168RPM
Moment of inertia
19174.8mm⁴
Deflection ratio
L/762
Max bending moment
125000.0N·mm
Max bending stress
81.49MPa
Safety factor
3.07PASS
These calcs are just the start.
Drop your email — we’ll let you know when it’s ready.