The aquisistion of the latest G+M Dorn CNC downfeed grinder has resulted in a reduction in length tolerance to +/- 0.25mm on springs up to and including a wire diameter of 8mm.
This machine has the benefit of being able to independently control the speed of each grinding wheel, which means that the amount of material being removed each end of the spring can be adjusted giving a visibly improved product and unbelievable squareness.