•For the spindle sleeve with a width of L¡Ü15mm, the measurement shall be carried out in the circumference of the mid section of the spindle sleeve width. •For the spindle sleeve with a width of L¡Ü15mm, the measurement shall be carried out in both circumferences located 5mm away from each end. The measurement point of the circumference is carried out by circle 7 (the measurement point shall avoid oil tank, oil cavity, lubricating hole and steel impression mark location).