Expansion mandrel
SIAM RINGSPANN
For the resumption of borings grooved on bottom or foot of grooves, or on the diameter of the grooves, the absolute precision of concentricity obtained is lower than 10µm.
The movement relative of the casing at the time of its expansion, is used as for him, to plate the plane sill, which still improves quality of work-holding.
In complement of its chucks with casing for interior recovery, SIAM-RINGSPANN developed a new concept of tightening for external recovery.
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