I want to develop a solenoid for push application. the required push is around 5kg by electromagnet. We can use a combination of permenant magnet and electromagnet to optimize the design with respect to area and power consumption. For eg. the solenoid can push a permenant magnet also.

The required stroke is of 1-2 inches by appling around 3 to 5kg force.

The electromagnet has to run on 6 volts, that is 4 AA batteries and consume around 200 to 300 mAmps. The dutly cycle will be 25% under normal operation

Can any one please guide on how to build it?