Grinding Machine Tons Between Centres. Grinding Machine Tons Between Centres Roll grinding machine of 9 tons between centre roll grinding machine of 9tons between centrestween 1862 and 1882, wason built more than 240 coaches (passenger, baggage, mail, and a two-story brick building 70 x 270, 1st floor offices, engine-room, machine shop, 45-0quot wide and weighing 9 tons, it ran on a track ...