GMB Gantry Type Milling and Boring Machining Center
Introduction of GMB Gantry Type Milling and Boring Machining Center:
All GMB series milling and boring machines equip two speed ZF gear boxes(built in Germany) used for powering high rigidity spindle units, allowing both high torque, low speed rough machining and high speed precision machining.
The gantry structure is designed with a large cross section area, which is in combination with stepped design of the guide ways, greatly increasing stability during heavy cutting operations.
A great variety of optional accessories is available for your choice, such as a heavy-duty milling head for five-face machining.

Features of GMB Gantry Type Milling and Boring Machining Center:
1. The headstock adopts double hydraulic balancing mechanism for steady movement.
2. The design of large section area of beam and step construction guide-ways makes the distance between spindle center line and lower guide-ways shortened, and the bend strength and torsion strength of beam increased.
3. The bed, column, beam, slide and spindle box of the milling and boring machine adopt cast iron formed from resin bonded sand model and reasonable layout of ribs to provide good stiffness and steadiness.
4. As a result of optimal designation and equipment of AC servomotor with large inertia for driving, quality ball screws and linear guide-ways with heavy load, the worktable has good positioning accuracy and stationary response characteristic.
5. The main motion of the machine adopts AC main servomotor with wide speed changing and ZF gearbox to offer the spindle with large torsion output in low speed for heavy cutting, and constant power in high-speed for finish machining.
6. Supported by special bearings, the spindle achieves high stiffness and good rotary accuracy. It uses oil cooler (cycle system) to cool the spindle unit, thereby effectively control the temperature rising of spindle unit.

Technical Specifications of GMB Gantry Type Milling and Boring Machining Center:

Model			Units	GMB1016	GMB1020	GMB1225	GMB1230
Worktable	Worktable size		mm	1000×1600	1000×2000	1250×2500	1250×3000
	Distance between two columns		mm	1250	1250	1450	1450
	Max. load capacity		kg	3000	3500	5000	6000
	T-slot		mm×N	22×7	22×7	22×7	22×7
	Worktable travel (X-axis)		mm	1600	2000	2500	3000
Machining range	Saddle travel (Y-axis)		mm	1000	1000	1250	1250
	Spindle box travel (Z-axis)		mm	600	600	750	750
	Distance from spindle Max.		mm	800	800	950	950
	Nose to table surface Min.		mm	200	200	200	200
Spindle	Spindle taper (7:24)			BT50	BT50	BT50	BT50
	Spindle speed range		r/min	40-6000	40-6000	40-6000	40-6000
	Max. spindle torque		N.m	114/152 117/140	114/152 117/140	456/611 468/560	456/611 468/560
	Spindle motor power		kW	12/16 18.5/22	12/16 18.5/22	12/16 18.5/22	12/16 18.5/22
Feed	Cutting feed speed range		mm/min	1-10000	1-10000	1-10000	1-10000
	Rapid travel	X-axis	m/min	20	20	20	20
		Y-axis	m/min	20	20	20	20
		Z-axis	m/min	16	16	16	16
Tool magazine	Max. tool length		mm	350	350	350	350
	Type			Disk type, Chain type	Disk type, Chain type	Disk type, Chain type	Disk type, Chain type
	Capacity		N	Disk type20, Chain type32	Disk type20, Chain type32	Disk type20, Chain type32	Disk type20, Chain type32
	Max. tool diameter	Full	mm	Ø125	Ø125	Ø125	Ø125
	Adjacent socket	Empty	mm	Ø225	Ø225	Ø225	Ø225
	Tool changing time (Tip to tip)		s	6	6	6	6
	Max. tool weight		kg	20	20	20	20
Positioning accuracy	Executing national standard	X-axis	mm	0.025 (0.015 With scale)	0.025 (0.015 With scale)	0.030 (0.018 With scale)	0.030 (0.018 With scale)
		Y-axis	mm	0.020 (0.010 With scale)	0.020 (0.010 With scale)	0.020 (0.010 With scale)	0.020 (0.010 With scale)
		Z-axis	mm	0.015 (0.010 With scale)	0.015 (0.010 With scale)	0.015 (0.010 With scale	0.015 (0.010 With scale)
	According to JISB6330 standard	X-axis	mm	±0.005/300 (±0.003/300 With scale)	±0.005/300 (±0.003/300 With scale)	±0.005/300 (±0.003/300 With scale	±0.005/300 (±0.003/300 With scale)
		Y-axis	mm
		Z-axis	mm
Repeatability	Executing national standard	X-axis	mm	0.014 (0.010 With scale)	0.014 (0.010 With scale)	0.018 (0.012 With scale)	0.018 (0.012 With scale)
		Y-axis	mm	0.012 (0.006 With scale)	0.012 (0.006 With scale)	0.012 (0.006 With scale)	0.012 (0.006 With scale)
		Z-axis	mm	0.010 (0.006 With scale)	0.010 (0.006 With scale	0.010 (0.006 With scale	0.010 (0.006 With scale)
	According to JISB6330 standard	X-axis	mm	±0.003 (±0.002 With scale)	±0.003 (±0.002 With scale)	±0.003 (±0.002 With scale)	±0.003 (±0.002 With scale)
		Y-axis	mm
		Z-axis	mm
Weight of machine			kg	22000	26000	31000	34000
Electric total capacity			KVA	56 61	56 61	59 64	59 64
CNC system				SIEMENS 802DSL FANUC 0i	SIEMENS 802DSL FANUC 0i	SIEMENS 802DSL FANUC 0i	SIEMENS 802DSL FANUC 0i

Technical Specifications of GMB Gantry Type Milling and Boring Machining Center:

Model			Units	GMB1620	GMB1630	GMB1640
Worktable	Worktable size		mm	1600×2000	1600×3000	1600×4000
	Distance between two columns		mm	2100	2100	2100
	Max. load capacity		kg	8000	10000	12000
	T-slot		mm×N	22×9	22×9	22×9
	Worktable travel (X-axis)		mm	2200	3200	4200
Machining range	Saddle travel (Y-axis)		mm	2300	2300	2300
	Spindle box travel (Z-axis)		mm	1000	1000	1000
	Distance from spindle Max.		mm	1200	1200	1200
	Nose to table surface Min.		mm	200	200	200
Spindle	Spindle taper (7:24)			BT50	BT50	BT50
	Spindle speed range		r/min	40-6000	40-6000	40-6000
	Max. spindle torque		N.m	1050/1435 1000/1228	1050/1435 1000/1228	1050/1435 1000/1228
	Spindle motor power		kW	30/41 30/37	30/41 30/37	30/41 30/37
Feed	Cutting feed speed range		mm/min	1-8000	1-8000	1-8000
	Rapid travel	X-axis	m/min	10	10	10
		Y-axis	m/min	10	10	10
		Z-axis	m/min	10	10	10
Tool magazine	Max. tool length		mm	300	300	300
	Type			Chain type	Chain type	Chain type
	Capacity		N	32, 40, 50, 60	32, 40, 50, 60	32, 40, 50, 60
	Max. tool diameter	Full	mm	Ø125	Ø125	Ø125
	Adjacent socket	Empty	mm	Ø225	Ø225	Ø225
	Tool changing time (Tip to tip)		s	6	6	6
	Max. tool weight		kg	20	20	20
Positioning accuracy	Executing national standard	X-axis	mm	0.030 (0.020 With raster)	0.035 (0.020 With scale)	0.040 (0.025 With scale)
		Y-axis	mm	0.030 (0.020 With raster)	0.030 (0.020 With scale)	0.030 (0.020 With scale)
		Z-axis	mm	0.020 (0.010 With raster)	0.020 (0.010 With scale)	0.020 (0.010 With scale)
	According to JISB6330 standard	X-axis	mm	±0.005/300 (±0.003/300 With scale)	±0.005/300 (±0.003/300 With scale	±0.005/300 (±0.003/300 With scale
		Y-axis	mm
		Z-axis	mm
Repeatability	Executing national standard	X-axis	mm	0.018 (0.012 With raster)	0.022 (0.014 With scale)	0.026 (0.016 With scale)
		Y-axis	mm	0.018 (0.012 With raster)	0.018 (0.012 With scale)	0.018 (0.012 With scale)
		Z-axis	mm	0.012 (0.006 With raster)	0.012 (0.006 With scale)	0.012 (0.006 With scale)
	According to JISB6330 standard	X-axis	mm	±0.003 (±0.002 With scale)	±0.003 (±0.002 With scale)	±0.003 (±0.002 With scale)
		Y-axis	mm
		Z-axis	mm
Weight of machine			kg	40000	46000	51000
Electric total capacity			KVA	89 96	89 96	89 96
CNC system				SIEMENS 840D FANUC 18i	SIEMENS 840D FANUC 18i	SIEMENS 840D FANUC 18i

Technical Specifications of GMB Gantry Type Milling and Boring Machining Center:

Model					Units	GMB2030	GMB2040	GMB2540	GMB2550	GMB2560
Worktable	Worktable size				mm	2000×3000	2000×4000	2500×4000	2500×5000	2500×6000
	Distance between two columns				mm	2500	2500	3200	3200	3200
	Max. load capacity				kg	12000	14000	18000	20000	22000
	T-slot				mm×N	22×11	22×11	28×11	28×11	28×11
	Worktable travel (X-axis)				mm	3200	4200	4200	5200	6200
Machining range	Saddle travel (Y-axis)				mm	2700	2700	3200	3200	3200
	Spindle box travel (Z-axis)				mm	1000	1000	1000	1000	1000
	Distance from spindle Max.				mm	1200	1200	1200	1200	1200
	Nose to table surface Min.				mm	200	200	200	200	200
Spindle	Spindle taper (7:24)					BT50	BT50	BT50	BT50	BT50
	Spindle speed range				r/min	40-6000	40-6000	40-6000	40-6000	40-6000
	Max. spindle torque				N.m	1050/1435 1000/1228	1050/1435 1000/1228	1050/1435 1000/1228	1050/1435 1000/1228	1050/1435 1000/1228
	Spindle motor power				kW	30/41 30/37	30/41 30/37	30/41 30/37	30/41 30/37	30/41 30/37
Feed	Cutting feed speed range				mm/min	1-8000	1-8000	1-8000	1-8000	1-8000
	Rapid travel			X-axis	m/min	10	10	10	10	10
				Y-axis	m/min	10	10	10	10	10
				Z-axis	m/min	10	10	10	10	10
Tool magazine	Max. tool length				mm	300	300	300	300	300
	Type					Chain type	Chain type	Chain type	Chain type	Chain type
	Capacity				N	32, 40, 50, 60	32, 40, 50, 60	32, 40, 50, 60	32, 40, 50, 60	32, 40, 50, 60
	Max. tool diameter	Full			mm	Ø125	Ø125	Ø125	Ø125	Ø125
	Adjacent socket	Empty			mm	Ø225	Ø225	Ø225	Ø225	Ø225
	Tool changing time (Tip to tip)				s	6	6	6	6	6
	Max. tool weight				kg	20	20	20	20	20
Positioning accuracy	Executing national standard		X-axis		mm	0.035 (0.022 With scale)	0.040 (0.025 With scale)	0.040 (0.025 With scale)	0.045 (0.025 With scale)	0.045 (0.025 With scale)
			Y-axis		mm	0.030 (0.020 With scale)	0.030 (0.020 With scale)	0.035 (0.020 With scale)	0.035 (0.020 With scale)	0.035 (0.020 With scale)
			Z-axis		mm	0.020 (0.010 With scale)	0.020 (0.010 With scale)	0.020 (0.010 With scale)	0.020 (0.010 With scale)	0.020 (0.010 With scale)
	According to JISB6330 standard		X-axis		mm	±0.005/300 (±0.003/300 With scale)	±0.005/300 (±0.003/300 With scale	±0.005/300 (±0.003/300 With scale	±0.005/300 (±0.003/300 With scale	±0.005/300 (±0.003/300 With scale
			Y-axis		mm
			Z-axis		mm
Repeatability	Executing national standard		X-axis		mm	0.022 (0.014 With scale)	0.026 (0.016 With scale)	0.026 (0.016 With scale)	0.030 (0.020 With scale)	0.030 (0.020 With scale)
			Y-axis		mm	0.018 (0.012 With scale)	0.018 (0.012 With scale)	0.022 (0.014 With scale)	0.022 (0.014 With scale)	0.022 (0.014 With scale)
			Z-axis		mm	0.012 (0.006 With scale)	0.012 (0.006 With scale	0.012 (0.006 With scale	0.012 (0.006 With scale)	0.012 (0.006 With scale)
	According to JISB6330 standard		X-axis		mm	±0.003 (±0.002 With scale)	±0.003 (±0.002 With scale)	±0.003 (±0.002 With scale)	±0.003 (±0.002 With scale)	±0.003 (±0.002 With scale)
			Y-axis		mm
			Z-axis		mm
Weight of machine					kg	57000	63000	73000	80000	88000
Electric total capacity					KVA	89 96	89 103	89 103	89 103	89 103
CNC system						SIEMENS 840D FANUC 18i	SIEMENS 840D FANUC 18i	SIEMENS 840D FANUC 18i	SIEMENS 840D FANUC 18i	SIEMENS 840D FANUC 18i

SMTCL, a China milling and boring machining center manufacturer, offers complete CNC machining services and technical assistance to convert your challenges into solutions.

GMB Gantry Type Milling and Boring Machining Center