The project I'm building involves a 12 V electric motor connected to a spindle lifting a 20kg weight. The radius of the spindle is 2cm, so the torque applied by the weight is 0,02m*20kg*9,8m/s^2, which gives me 3,92N*m. So, my 12 V motor needs to deliver 3,92N*m just to keep the weight steady. This is 40kgf*cm of torque. I'm having trouble to select a motor appropriate for this task. First of all, the project that I'm designing will be placed on the chassis of a car, so it needs to be very trustworthy and robust (it will be exposed to all kinds of enviromental effects). Also, to lower costs, I don't want to design any gearbox to increase torque, so I think it would be better if the motor in question already included the gearbox. I searched for all kinds of 12 V gear motors, but haven't found anything within those limitations. Could you give me any hints on how to proceed? Would designing a gearbox will be my only way out? Also, all DC motors that I've found are used primarily in robotics, automation... I'm not sure if this kind of motor is recommended for this application.