This group of lathes makes it possible to fulfil  cutting of precise parts, such as bodys of revolution of irregular shape with d=up to 26mm and l=up to 80 mm. Working accuracy on diameter comprises 0,022 mm, on length - 0,02 mm. Roughness of surface of the components cut is: Ra 1,25 - Ra 0,63. For the centreless-grinding lathes diameter of the parts treated is 1.5mm-80mm; overall length is 200 mm. Cleanliness of development on diameter is: Ra 0,08 - Ra 0,04.