Mean diameter dm   mm
Lead L   mm
Lead angle λ   °
Angle α   °
Normal angle αn   °
Friction coef. μ    
Force F   N
         
Collar        
Collar diameter dc   mm
Friction coef. Of collar μc    
         
Collar torque TC   N·m
Raising torque TR   N·m
Lowering torque TL   N·m
Efficiency e