GTC Gantry Type Turning Center
Introduction of GTC Gantry Type Turning Center:
Machine tools of GTC series are large CNC vertical lathes with moving cross beam or fixed cross beam. The lathes are built on the basis of Japan technology. In order to better use the technology, we at SMTCL invited Japanese specialists to make instruction.
This machine is widely used for machining large-size and discal parts such as wheel, motor body, valve body, flange and motor seat, pump body with large size.
It is also applied to turning the curved surface such as outer circle, inner hole and end surface in once setup.
Main components of this turning center, including CNC system, main electric components, main bearings, ball screws and hydraulic components, are imported from renowned companies all over the world.
Thanks to the sophisticated technology, imported components, state-of-the-art facilities and advanced measure methods, this kind of machine tool features high machining accuracy, stiffness, reliability, reasonable layout, convenient operation and high automatic degree.
Automatic turning with no people operation can be achieved by the machine (with automatic measuring device and tool measuring device), thus improving machining quality and reducing operation cost.

Structure Features of GTC Gantry Type Turning Center:
Ram
The rectangular ram is moving on the beam to realize X-axis, Z-axis sliding. Its balance is achieved through hydraulic balancing cylinders located symmetrically on both sides of the ram.
Beam
Beam is designed with reasonable layout so as to prevent the bending ram by movement and cutting caused by force.
Column
This CNC vertical lathe contains single column and double columns. These are of symmetrical structure and centered on the base. Symmetrical circular reinforce ribs are also adopted inside for high strength and stiffness.
Main Transmission
AC servo motor drives worktable to rotate through V type belt and gearbox to realize constant line speed cutting.
Operation Panel
Optional FANUC and SIEMENS CNC systems to realize servo control with high speed and high accuracy.
Tools and Tool Holders
The clamping of tools and holders is realized by pushing oil cylinder, which located on the upper part of ram, to move the drawing bar up and down. The Belleville spring inside the ram can raise, clamp the tools and position the tools by arc plate at the lower part.
Worktable
The standard accessory is with manual 4-jaw chuck.
Base
The base is of symmetrical structure and combines circular reinforce ribs, radial ribs and tri-angular ribs.

Technical Specifications of GTC Gantry Type Turning Center:

Item	Units	Moving cross beam						Fixing cross beam
		GTC 16090	GTC 20090	GTC 250110	GTC 300125	GTC 350160	GTC 400160	GTC 25060	GTC 35060	GTC 38075	GTC 40060	GTC 45060	GTC 450140
Table diameter	mm	1260 (1400)	1600	2000	2500	3300	3600	2250	3300	3600	3600	4000	4000
Max. swing diameter	mm	1600	2000	2500	3000	3500	4000	2500	3500	3800	4000	4500	4500
Max. turning diameter	mm	1600	2000	2500	3000	3500	4000	2500	3500	3800	4000	4500	4500
Max. work- piece height	mm	1200 (1600)	1600	2000	2000	2800	3000	600	700	750	700	700	1400
Max. work- piece weight	t	6	8	10	16	25	25	10	25	25	25	30	30
Max. torque	Nm	10960	20000	40000	68500	82000	82000	28000	82000	82000	82000	120000	120000
Vertical travel of ram	mm	900	900	1200	1300	1600	1600	600	600	750	600	600	1400
Hori- zontal travel of ram	mm	-1700	-2200	-2900	-2900	-3330	-3580	-1950	-3530	-3530	-3530	-3650	-3650
Ram section size	mm	200 ×200	220 ×220	240 ×240	240 ×240	240 ×240	240 ×240	240 ×240	240 ×240	240 ×240	240 ×240	240 ×240	240 ×240
Tool holder section dimen- sion	mm	40×40 (32×32)	40×40	40×40	40×40	40×40	40×40	40×40	40×40	40×40	40×40	40×40	40×40
Stations of tool maga- zine	Sta- tion	12	12	12	12	12	12	-	12	12	12	12	12
Max. tool holder weight	kg	45	45	50	50	50	50	50	50	50	50	50	50
Cutting feed speed	mm/ s	0.01-50	0.01-50	0.01-40	0.01-40	0. 01-40	0.01-40	0.01-40	0.01-40	0.01-40	0.01-40	0.01-40	0.01-40
Rapid feed speed	m/ min	8	8	8	8	8	8	10	8	8	8	8	8
Table rotating speed	r/ min	1-312	1-254	1-180	1-160	1- 81	1-81	1-120	1-81	1-81	1-81	1-60	1-60
Table speed steps		2 step	2 step	2 step	2 step	2 step	2 step	2 step	2 step	2 step	2 step	2 step	2 step
Cross beam vertical travel	mm	250×2 (3 step) 250×4 (5 step)	250×2 (3 step) 250×4 (5 step)	250×2 (3 step) 250×4 (5 step)	250×2 (3 step) 250×4 (5 step)	1800	1800	Fixing	Fixing	Fixing	Fixing	Fixing	Fixing
Main drive motor power	kW	AC37 /39	AC45 /51	AC60 /75	AC60 /75	AC60 / 75	AC60 /75	AC60 /75	AC60 /75	AC60 /75	AC60 /75	AC60 /75	AC60 /75
Power of motor for hori- zontal feed	kW	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42
Power of motor for vertical feed	kW	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42	7/9.42
Workpiece accuracy		IT6	IT6	IT6	IT6	IT6	IT6	IT6	IT6	IT6	IT6	IT6	IT6
Work- piece surface accuracy	μm	Ra1.6	Ra1.6	Ra1.6	Ra1.6	Ra1.6	Ra1.6	Ra1.6	Ra1.6	Ra1.6	Ra1.6	Ra1.6	Ra1.6
Machine weight	kg	20000	35000	50000	50000	70000	90000	50000	90000	90000	95000	100000	100000
Machine dimen- sion	mm	6500 ×4800 ×5500 (6100)	7200 ×5500 ×6420	10600 ×5600 ×7163	10145 ×6300 ×7400	10280 ×7200 ×9 000	10780 ×7200 ×9000	9500 ×7500 ×5000	12900 ×5700 ×7470	12900 ×5700 ×7470	12900 ×5700 ×7470	12900 ×5700 ×7470	12900 ×5700 ×9000
CNC system		FA- NUC/ SIE- MENS	FA- NUC/ SIE- MENS	FA- NUC/ SIE- MENS	FA- NUC/ SIE- MENS	FA- NUC/ SIE- MENS	FA- NUC/ SIE- MENS	FA- NUC/ SIE- MENS	FA- NUC/ SIE- MENS	FA- NUC/ SIE- MENS	FA-NUC/ SIE- MENS	FA- NUC/ SIE- MENS	FA- NUC/ SIE- MENS

SMTCL is an experienced gantry type turning center manufacturer in China. Over the years, our main focus has been the production of reliable and efficient metal cutting machine tools.

GTC Gantry Type Turning Center