Operation function: After the uncoiler central spindle taking the steel coil, Central spindle shrinks and inflates through oil cylinder revolving in order to stick inner hole and then uncoil, so that the whole processing of uncoil ,leveling and shearing can be accomplished.

Mechanical structures: consists of body supporting, body and central spindle which can shrink and inflate.

Technical illustration: As the uncoiler working normally, they are passive feeding. Central spindle shrinks and inflates through oil cylinder revolving. The central spindle receives the steel coil when shrinking and then sticks coil inner hole when it getting big. The uncoiler harmomegathus central spindle to be composed of the arc steel plate, adopting overall processing first and then cutting it, the overall roundness is good.