The five machines – comprising a 4-axis horizontal model and the remainder 3-/5-axis vertical designs – are scheduled for installation and commissioning during the second half of 2021.

These SIP machines will be used to produce a range of different workpieces including gearboxes, structural components and satellite guidance systems. They have been chosen by customers because of their ability to consistently produce ultra high-precision, right-first-time results over many years, with no material wastage – even after resetting to suit different/redesigned workpieces.

The machines’ impressive build qualities and performance specifications will ensure these demands are met. Based on a closed rigid frame supported on three points, the machines’ extreme levels of high accuracy – for example, in some cases positioning repeatability is quoted as close to 1µm - is also endeared by SIP’s renowned hand scraping of features such as machine bases, linear guideways and spindle heads.

The quartet of vertical machines under construction will be able to accommodate workpieces weighing ranging from 2,500 to 4,000kg, and have clamping surfaces from 1,200mm by 900mm to 1,700mm by 1,200mm. The horizontal machine will handle components weighing up to 4,000kg on a clamping surface of 1,200mm by 1,200mm.

In all cases, the standard spindle rating is 6,000rpm, but optional 8,000rpm spindles are available. All of the vertical models have automatic tool changers, and two have high-pressure through-coolant.

SIP sales manager, Adriano Della Vecchia, says: “Underpinned by the SIP mantra of ‘Precision without compromise’, several thousand SIP machines are in operation worldwide, among them a SIP 600 model from 1963! SIP enjoys a worldwide reputation in ultra high-precision jig boring, not only in the niche markets of aerospace and aircraft industries, but also in the transportation and energy sectors in territories that include China, India, USA and Europe.”

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