Makino D800Z 40T

The Makino D800Z 40T is the 40-taper build of the D800Z, a large five-axis vertical machining center with an 800 mm ø (31.5 in Ø ) rotary table and travels of 1,200 mm (47.24 in) in X, 1,100 mm (43.30 in) in Y and 650 mm (25.59 in) in Z. It is fitted with a 14,000 rpm spindle in CAT40 as standard, or HSK-A63 if ordered, and the faster option is a 20,000 rpm HSK-A63 spindle.

What both D800Z builds share is the table. The tilt-trunnion is shaped like a Z so that the center of gravity of the table and the part stays inside the center of rotation of the B and C axes, which run on direct-drive motors with large-diameter bearings. B swings 180° (-180° to 0°) and C turns 360°. The payload is 1,200 kg (2,646 lb), and the largest part listed is 1,000 mm Ø x 500 mm (with limitations), so a heavy part wider than the table can still be machined within those limits.

The 40-taper spindle decides what the machine is good at. A 14,000 rpm CAT40 or 20,000 rpm HSK-A63 spindle suits medium and small cutters on aluminum, finishing passes and contouring of large parts, more than heavy roughing in steel, which is the job of the CAT50 build. Linear rapids and cutting feedrate are both 36,000 mm/min (1,417 ipm), against 60,000 mm/min (2,362 in/min) on the much smaller Makino D300.

The tooling limits are those of a 40-taper machine. The magazine holds 40 tools, with 80 as an option. Tools may be up to 140 mm with limitations (5.5 in with limitations) in diameter and weigh 8 kg (17.6 lb). Tool change takes 3 sec tool-to-tool and 9 sec chip-to-chip. Core-cooled ballscrews and temperature control of the direct-drive motors are there to hold accuracy over long cycles on big parts.

The Makino D800Z 50T uses the same table and travels but changes the spindle to CAT50 at 12,000 rpm, raises the magazine to 48 tools (117 optional) and the tool weight to 20 kg (44 lb).