Raising and lowering torque
T_R uses sec(alpha) with the angle you enter, in degrees. Diameters are converted to meters so force in newtons gives newton-meters. Collar torque is added as entered, in newton-meters.
The check f x sec(alpha) > tan(lambda) only compares those entered numbers. It does not prove a real screw will hold a load. Efficiency uses the raising torque only.