Cradle drafting inspecting and rebuilding tool It is suitable for inspecting and maintaining homebred and partial imported cradle. (1)It is equipped with standard spring pull and press tester, which can carry on partial and synthetic pressure test to the pressure spring of drafting cradle. The system error is not exceed 5N. (2)The front top roller impulse and the parallel error are not exceed 0.2mm and 0.3:70mm respectively. (3)Parallel error of middle, upper and back roller is not exceed 0.4:70mm. (4)The rebuilding error of various tools is not larger than 0.1-0.3mm. (5)The upper and lower rebuilding error is not exceed 0.05mm. (6)The system error of spacer inspecting tool is not exceed 0.05mm.