Makino D800Z 50T

The Makino D800Z 50T is the heavy-spindle version of the D800Z five-axis vertical: a CAT50 spindle running to 12,000 rpm, an 18,000 rpm spindle as the option, and HSK-A100 available in place of CAT50. It keeps the D800Z envelope of 1,200 mm (47.24 in) X, 1,100 mm (43.30 in) Y and 650 mm (25.59 in) Z over an 800 mm ø (31.5 in Ø ) table rated for 1,200 kg (2,646 lb).

Choosing the 50-taper build is mostly a tooling decision. Tools can weigh up to 20 kg (44 lb), more than double the 8 kg (17.6 lb) of the D800Z 40T, so heavier holders, long extensions and large indexable cutters become practical. The magazine also grows, to 48 tools as standard with a 117-tool magazine as an option. One figure goes the other way: maximum tool diameter is listed as 120 mm with limitations (4.72 in with limitations), smaller than the 140 mm of the D800Z 40T, so check the largest face mill you plan to use.

The listed part height is also slightly greater, 1,000 mm Ø x 550 mm (with limitations) (39.4 in Ø x 21.65 in (with limitations)). Large parts sit on a Z-shaped tilt-trunnion that keeps the combined center of gravity of table and work inside the B and C centers of rotation. Large-diameter bearings limit table deflection, and the direct-drive B axis covers 180° (-180° to 0°) while C turns 360°.

Feeds are the same as on the D800Z 40T: rapids and cutting feedrate of 36,000 mm/min (1,417 ipm), with 3 sec tool-to-tool and 9 sec chip-to-chip. For thermal stability the machine uses core-cooled ballscrews and temperature control of the direct-drive motors.

For a buyer, the question is whether the work needs 50-taper tools and stiffness more than spindle speed. If most of the work is aluminum or finishing with smaller cutters, the 14,000 rpm (20,000 optional) D800Z 40T is the other configuration of the same machine.