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Inca Geometric has announced that it offers flexibility in general machining for a range of customers in sectors including automotive, transport, power generation, pump, defence and marine.

The company said that with its ability to operate as a general machinist, a wide range of work passes through the doors, from miniature ball stops to generator bed frames measuring 6m x 2m.

Inca’s engineers recently rebuilt a 21-spindle and two 45-spindle multi-tapping heads for an automotive customer during its shutdown and also rebuilt two cylindrical grinding machines and four hydraulic presses for an off-road vehicle manufacturer.

The company also recently had to pick up a large shaft from a power station at midnight, reverse-engineer a new part, machine it on a Dugard Eagle 400 lathe and have it back to the station by 6am the following morning ready for its re-assembly.

An example of Inca’s production capability is the machining of an aluminium wheel-style component from billets around 555mm diameter x 41.5mm thick.

Originally, they were cast but blow holes were a common problem.

In recommending the switch of raw material to a blank, Inca redesigned the component with its central boss as a separate item to save material, which is machined separately leaving stock material for finish turning.

The boss is then screwed and secured with Loctite adhesive into the bore of the main wheel and then finish-turned as an assembly with the addition of a screw-cut thread on the OD.

Produced in four operations, the profile of the wheel-style component is initially roughed out and bored to accept the central boss, then re-chucked and clocked true for the rear to be machined, which includes a large scalloped recess in the face.

The rear face is then finish-machined and clamped to a face plate locating precisely from the bore ready for the final profile, to be faced and turned.

The boss is then finish-turned true to the bore and threaded.

The part, which can be machined from either aluminium or brass, takes around an hour and 15 minutes to produce.

Occasionally parts are required in Perspex, which means high levels of care have to be taken to prevent scratching or marking.

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