Thread helix angle

Calculates thread lead from pitch and user-supplied number of starts.

Calculates turns for a given thread length and lead.

Calculates approximate thread depth from a pitch multiplier; it is not a standards-based inspection dimension.

Calculates simplified thread cutting time from thread length, approach length, and feed rate.

Calculates engagement turns from engagement length and pitch.

Calculates required thread engagement from axial force, allowable shear stress, and effective shear perimeter.