MOTOR FOR HEAVY LOAD

WHAT MOTOR CAN I USE FOR A 25KG LOAD AND IT IS GEARED ...........

i am planning to use arduino mega

and need position control

You need to provide more detail.
Are you lifting the object?
Rotating it?
In which axis?
How fast?

sorry

i am rotating a satellite dish and the other is for moving the dish up and down ....... satellite weights 25 kg ..... mostly need position control and want to use gear motors and not a stepper motor

so need a mototr that can handle a heavy load and rotate 36o degrees cw and ccw ....

If the dish mount is properly designed and balanced, a large motor may not be necessary. A $10 cordless screwdriver motor might do the rotatrion job. For up/down operaton, linear acruators like below are normally used.

https://www.google.com/search?q=satellite+dish+actuator&num=100&hl=en&lr=&tbo=u&as_qdr=all&tbm=isch&source=univ&sa=X&ei=AdOjUNrFB4qx0AGtkYCICw&ved=0CGEQsAQ&biw=1196&bih=641