Th3015 bare machine is integrally formed by precision casting through resin sand type high-strength cast irons, with reasonable ribbon structure, good rigidity, totally aged treatment and strong stability. The lathe adopts a gantry structure and the worktable is movable. The main axle-box part adopts a dual-cylinder balance mechanism so as to ensure the motion stability of the main axle-box. The crossbeam adopts a large-dimension section design so as to reinforce the bending stiffness and torsional stiffness. Rolling guideways are assembled on the upper surface and side surfaces of the crossbeam so as to reinforce the anti-rolling capability of the main axle-box. Hard-rail quenching process and sizing process are applied to Z axis, thus being beneficial to improving the cutting stability and wearability. The guideway adopts imported 65# overloaded pre-tightened guideway. The screw rod adopts imported R80-010 C5-grade grinding screw rod, with two ends being fixed and pre-stretched. All bearings are imported P5-grade bearings in pair. The mainshaft is BT50 straightly-connected precision mainshaft produced in Taiwan, with the maximum rotating speed of 6000r/min. Stainless steel protective shields are provided before and after Y axis, X axis adopts a flexible organ cover. The flexible organ cover is also arranged below the handpiece. Furthermore, automatic lubricating systems are provided, and tool storage mounting surfaces are reserved. The appearance of bare machine shall be painted with required colors. The bare machine does not contain any electrical apparatuses.

Item	Requirement (unit) or specification	Remarks
Dimensions of worktop	1500X3000
Width of gantry	1850
Distance from end surface of mainshaft to worktop	120-1120
Vertical stroke (Z) of mainshaft	1000
Lateral stroke (X) of worktable	1500
Longitudinal stroke (Y) of worktable	3000
X-axis linear guideway	HGW65HA3RH	Hiwin
Y-axis linear guideway	HGW65HA4RH	Hiwin
Z-axis hard guideway	Sliding part adopts wearable films	Imported
X-axis and Z-axis ball screw rods	R65-010-0.018(C5-grade)	Hiwin
Y-axis ball screw rod	R80-010-0.018(C5-grade)	Hiwin
Type and rotating speed of mainshaft	BT50 6000r/min	Volis
Three-axis bearing	Angle-contacted P5-level bearings in pair	Germany
Connecting forms of three-axis and mainshaft	directly-connected three-axis and mainshaft connected by synchronous belt
Torque of Recommended three-axis motor X/Y/Z	32Nm 45Nm 40Nm
Recommended power of mainshaft	15-18.5KW
Quantity-dimension*spacing of T-shaped trough of worktable	7-22X225
Planeness of worktable	+0.05
Maximum loading capacity of worktable	3000(Kg)
Verticality of Z axis on XY axis	0.05
Planeness of Z axis when moving	0.08
Positioning precision	0.05
Net weight of bare machine	25000Kg
Outline dimension	7400X2950X4600