Sheet: Trdnpwr.xlsScrewthread forcesEnter numbers in BOLDWritten by Alex Slocum, last updated 2/9/98Force to lift100.0Lead0.25coefficient of friction, mu0.2maximum screw radius0.25thread angle, cos(alpha)14.50.2530727415391778Beta2.0Torque required at screw (in-lb)9.454213004314742Backdriveable?NOEfficiency0.4208571962025283Torsional stress385.1992915661746gearbox ratio100.0travel (in, mm)0.5time to travel (s)20.0Motor speed (rpm, rad/s)600.062.83185307179586Gearbox efficiency1.0Motor torque (in-lb, N-m, oz-in)0.094542130043147420.0106861183310136151.5126740806903587Power (watts)0.6714286168820719Check: Ideal powerWeight (N)445.0speed (m/s)6.350012700025401E-4Power (W)0.28257556515113036BackdriveabilityRaising torqueEfficiency