Table 1: List of the parameters used in the present study.

ParameterSymbolUnitValue

Effective diameter of screw (right hand) mm30
Starts 5
Pitchp mm2
Helix angle ° 6.056
Contact angle ° 45
Effective diameter of roller (right hand) mm10
Effective diameter of nut (right hand) mm50
External diameter of nut thread mm51.2
Tooth number of the roller thread 20
Number of rollers 10
Orbital diameter of roller mm40
Radius of effective ball mm7.0711
Rolling coefficient of friction 0.005
Sliding coefficient of friction 0.05
Loss coefficient of energy 0.007
Young’s modulus Pa210 × 109
Poisson’s ratio 0.3