GDC series machines are designed with double headstocks to increase working efficiency greatly. Gear-box with characteristics of large torque in low speed and constant power in high speed is supplied for main transmission system; The movable bridge frame is designed with advanced synchro-driving technology used for transmission of gear and rack to secure high transmission accuracy. The machines can accomplish various drilling of all sorts of tube plate work-pieces in one time setting-up.

			GDC2030md	GDC2540md	GDC3540md
Worktable	Worktable size		2000×3000mm	2500×4000mm	3500×4000mm
	Max.mass on table		7000kg/m2	7000kg/m2	7000kg/m2
	T-slot		22×6mm×N	22×8mm×N	36×8mm×N
Machining range	Gantry travel(X-axis)	No tool magazine	3000mm	4000mm	4000mm
		tool magazine	2750mm	3750mm	3750mm
	Saddle travel(Y-axis)		2000mm	2500mm	3500mm
	Ram travel (Z-axis)		500mm	500mm	500mm
	Distance of spindle nose to table surface	Max.	650mm	650mm	900mm
		Min.	150mm	150mm	400mm
Spindle	Hole in spindle(7:24)		BT50	BT50	BT50
	Range of spindle speed		40-4500r/min	40-4500r/min	40-4500r/min
	Max.spindle torque		385/528(optional	385/526(optional	385/526(optional
			565/770)	565/770)	565/770)
			N.m	N.m	N.m
	Max.axial carrying resisting force		15000N	15000N	15000N
	Power of main motor		15/20.5×2	15/20.5×2	15/20.5×2
			(optional	(optional	(optional
			22/30×2)kW	22/30×2)kW	22/30×2)kW
	Max.drilling diameter		φ50mm	φ50mm	φ50mm
	Max.milling tool diameter		φ125mm	φ1250mm	φ125mm
	Max,tapping diameter	Cast iron	M30mm	M30mm	M30mm
		Carbon steel	M24mm	M24mm	M24mm
Feed	Cutting feedrate		1-5000mm/min	1-5000mm/min	1-5000mm/min
	Rapid traverse	X-axis	10m/min	10m/min	10m/min
		Y-axis	10m/min	8m/min	8m/min
		Z-axis	10m/min	10m/min	10m/min
Positioning accuracy	JB/T8771.4-1998	X-axis	0.030mm	0.035mm	0.035mm
		Y-axis	0.025mm	0.030mm	0.035mm
		Z-axis	0.012mm	0.012mm	0.012mm
	Executing standard(JISB6330)	X-axis	±0.005/300mm	±0.005/300mm	±0.005/300mm
		Y-axis	±0.005/300mm	±0.005/300mm	±0.005/300mm
		Z-axis	±0.005/300mm	±0.005/300mm	±0.005/300mm
Repeatability	JB/T8771.4-1998	X-axis	0.018mm	0.022mm	0.022mm
		Y-axis	0.014mm	0.018mm	0.022mm
		Z-axis	0.008mm	0.008mm	0.008mm
	Executing standard(JISB6330)	X-axis	±0.003mm	±0.003mm	±0.003mm
		Y-axis	±0.003mm	±0.003mm	±0.003mm
		Z-axis	±0.003mm	±0.003mm	±0.003mm
weight of machine			28400kg	33900kg	42500kg
CNC system			SIEMENS840D	SIEMENS840D	SIEMENS840D
Electrical total capacity			98KVA	98KVA	98KVA