Röders RPT800

The Röders RPT800 is the largest 3-axis RPT machine, and Röders singles out two things about it: an extra-long stroke in the Z-axis, also suitable for deep drilling, and very large guideways. The machining range is 840 mm x 635 mm x 500 mm (33.1 x 25.0 x 19.7 in) and the workpiece can weigh up to 800 kg (1,764 lb).

Set it beside the RXP801 and the reasoning shows. The two share a 796 mm x 596 mm table and an 800 kg limit. The RXP801 has a machining range of 800 mm x 635 mm x 400 mm and weighs about 8.4 t. The RPT800 adds travel in two directions and weighs about 10.5 t. That extra mass sits in the structure and guideways that Röders describes as large and therefore rigid.

There is 660 mm (26.0 in) between spindle nose and table. With 500 mm in the third axis, cooling bores and ejector holes in a mould plate can be drilled on the same machine that mills and grinds it, which removes a transfer to a separate drilling machine and the re-clamping error that comes with it.

The standard spindle is 36,000 rpm with 15 kW (20.1 hp) on HSK E50, for tools up to 20 mm; spindles up to HSK A63 are available. The changer has 40 or 84 places for HSK E50. Röders lists milling, grinding and measuring for the machine. For clamping it offers individual solutions up to 600 mm width. Required space is W 3,220 mm x L 3,250 mm x H 3,130 mm.