Sterling external keyway milling machine can cut the keyway by mounting on the shaft (dia. 25mm to 250mm) to maximum 32mm width. Driven by 1.5 HP electrical single phase motor and controlled by stepless electronic regulator, it is easy to carry to the job on site. It weighs 28 kgs. only and the slides can travel by 150mm. It is characterized by efficiency and takes less time in performing a job with a trouble free day.