Auram Machines [India] Private Limited manufactures Pitch Circle Drilling Machine. Auram Machines [India] Private Limited offers various types of drilling and tapping machines. Pitch Circle Drilling Machine is basically to drill no of holes on a pitch circle diameter. This is fully automatic machine which drills one hole at a time but the cycle is completed when no of predecided [equi-spaced] holes are drilled. This is achieved by indexing a job as per programmed indexing. The Pitch Circle Drilling Machine is very useful for a batch quantity jobs.