The Flexi-Chuck Workholding System

A highly adaptable chucking system that can be used on many different types of machines in the workshop for securely holding fragile, awkward and difficult to machine shapes both internally and externally.
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 Ideal for second operation processes, prototyping and repair work.  It can be used on a wide range of machine tools in the workshop whilst drilling, turning, milling, tapping and grinding operations are carried out.. 

The system comprises two main components.

1. The Chuck Body – This is machined from 4140 heat treated high tensile steel and houses all the moving components. The chuck body can be mounted to most lathes, milling machines, CNC work-centres, drills, rotary tables and dividing heads, surface and cylindrical grinders and many other types of machine tools via a backplate, Morse taper arbor, straight shank or base plate.

2. The Aluminium Adapters – These screw on to the front of the Flexi-Chuck and utilize a flexure mechanism so there are no actual moving parts forward of the chuck body to get jammed by chips or worn by abrasive grit. They can be turned or milled to suit an infinite variety of shapes and workpieces (see example pictures below). A rubber seal in each adapter protects the chuck’s critical components from the ingress of grit, chips and coolant.

The adapters are a consumable item and are available in three sizes – 50mm, 75mm and 100mm (2″, 3″ and 4″) and two grades of aluminium (2011 free machining, and 7075 high tensile).

 

Holding a clock escapement wheel.

Holding just on the tooth points.

Holding on an internal screw-thread.

Milling axial slots in nylon component.

Holding on an external thread.

Milling axial slots in nylon.

Holding tapered workpiece.

Modified as a small step chuck.

100mm adapter, modified as a step chuck.

Modified for eccentric turning.

Repeatable turned eccentric brass disc.

Holding on an internal cavity.

V12 model aircraft acrylic fuel tank.

V12 Model aircraft engine coolant tank.

Profile milling to 1mm wall thickness.

Making Flexi-Chuck lock rings.

Cap holds ring when splitting.