# Ball-screw sizing estimate
# Scope: Ideal ball screw thrust/torque with supplied mechanical efficiency.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

force = 500 N
lead = 5 mm
efficiency = 0.9
speed = 600 rpm

torque := force*lead/(2*pi*efficiency) [N*m]
velocity := speed*lead/(2*pi) [mm/s]

check torque budget: torque <= 1 N*m

scenario alternative: force = 400 N