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COVID-19 Update 9 April 2021: Online sales are OPEN, with orders being dispatched within two working days. Machines are being dispatched within five working days. Orders can be placed and paid for over the telephone for collection within a specified time. Viewing for machines by appointment only.
Our trade counter remains closed for general viewing. Please accept our apologies for any inconvenience caused.

Expanding Mandrels

Expanding Mandrels are used to hold a workpiece on it's bore enabling the outside to be turned. Working in a similar way to a split collet (only the other way round!), a split sleeve is mounted in the bore of the workpiece and expanded to grip the bore via an internal taper. Since the sleeve is split from both ends it expands equally along it's length when tightened onto the tapered pin.

Note: These products are not designed for use in the jewellery industry.