About Hydraulic Expanding Arbour
Hydraulic Expanding Arbour works by axially drawing the mandrel back using the machines drawtube after placing the expanding sleeve over it and securing it into place with a pin. This action forces the two tapers to interface and the mandrel to expand by pulling the expanding sleeve farther back onto the mandrel. It is utilised as a core around which pieces can be bent or other materials can be forged or moulded, or to support a partially machined item while it is being finalised.