MC75 Series Fixed-Beam CNC Gantry Surface Grinder-Nantong Yongchang CNC Machinery Technology Co., Ltd.

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MC75 Series Fixed-Beam CNC Gantry Surface Grinder

Economy‑class fixed‑gantry CNC gantry machining centers, gantry milling machines, gantry guideway grinders, and gantry surface grinders—custom manufacturer.

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YC-MC75 series economical cncend milling machine

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YC-MC75 series economical cncend milling machine

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Technical Specifications

Hydraulic station for hydrostatic guideways

A differential‑type adjustable flow valve is employed to regulate the float‑up of the worktable, ensuring that the float‑up remains substantially constant across varying load conditions and significantly reducing the power consumption of the main hydraulic station. The system features high load‑carrying capacity, reliable and stable operation, and energy efficiency and environmental friendliness.

Main fuel tank

It features a unique structure, with a temperature rise not exceeding 15°C, eliminating the need for an additional cooling system. The system enables impact-free commutation, ensuring smooth switching. The main oil pump motor requires only 11 kW of power. Overall, the system is characterized by stable and reliable operation, low noise levels, and energy efficiency and environmental friendliness.

Hydraulic station for hydrostatic/hydrodynamic grinding head

The grinding head employs a hydrostatic–hydrodynamic journal bearing design, offering high motion accuracy, zero wear, long service life, low starting power, and, for hydrodynamic bearings, substantial load-carrying capacity at high speeds along with excellent vibration resistance. The hydraulic power unit utilizes a constant-pressure system to supply oil to the hydrostatic–hydrodynamic grinding head, delivering stable pressure, low noise, and reduced temperature rise.

The gantry-type surface grinder has the following features:

1. The machine adopts a gantry configuration, with the bed, twin columns, and crossbeam forming the gantry’s frame structure. Both the hydrostatic guideways used on the worktable and the shock-free hydraulic system for the worktable have been granted national patents.

Utility Model Title: A Hydraulic System for an Energy-Saving, Cushioned Gantry Grinding Machine Worktable

Patent No.: ZL201821406894.4

Utility Model Title: A Multi-Unit Constant Flow Regulation Device

Patent No.: ZL201821406971.6

2. The crossbeam is equipped with a carriage and a grinding head. The carriage moves laterally along the crossbeam’s guide rails, while the grinding head performs vertical lifting motion along the carriage. The steel‑lined guide rails on the crossbeam cooperate with the dovetail‑type rolling guide blocks on the carriage, ensuring wear resistance and smooth, effortless movement.

3. The worktable’s longitudinal motion is driven by a right-side hydraulic system, offering stepless speed regulation and smooth operation.

4. The grinding head employs variable-frequency speed control, and its spindle is equipped with NSK precision rolling bearings or optionally features a hydrostatic/hydrodynamic bearing configuration.

5. Both the vertical and lateral feed motions of the grinding head are driven by AC servo systems, ensuring precise micro‑feed control of the ball screws, flexible cyclic feeding, and smooth rapid feeds.

6. Utilizes a modular design, allowing for customizable increases in processing height and length to meet customer requirements.

Specification/Model:		MC75 Series Gantry Surface Grinder
Aircraft model	Unit	MC7512-3000	MC7512-4000	MC7516-4000	MC7516-6000
Workbench
Length × Width	mm	3000*1200	4000*1200	4000*1600	6000*1600
Workbench guide rail type		Hydrostatic guideway	Hydrostatic guideway	Hydrostatic guideway	Hydrostatic guideway
Maximum workbench load	kilogram	4000	6000	7000	10000
T-slot specifications	mm	22	22	22	22
Processing range
Door width	mm	1700	1700	2100	2100
X/Y/Z axis travel range	mm	3000/1600/800	4000/1600/800	4000/2100/800	6000/2100/800
Distance from the grinding wheel to the worktable surface	mm	0-800	0-800	0-800	0-800
Movement speed and feed rate
Worktable travel speed	m/min	3-30	3-30	3-30	3-30
Crossfeed rate of the grinding head	m/min	0.1-3	0.1-3	0.1-3	0.1-3
Vertical travel speed of the grinding head	m/min	0.05-2	0.05-2	0.05-2	0.05-2
Minimum lateral feed rate of the grinding head	mm	0.005	0.005	0.005	0.005
Minimum vertical feed rate of the grinding head	mm	0.003	0.003	0.003	0.003
Spindle system
Spindle type	mm	Hydrostatic spindle	Hydrostatic spindle	Hydrostatic spindle	Hydrostatic spindle
Spindle taper		1:5	1:5	1:5	1:5
Grinding wheel dimensions	mm	500203100	500203100	500203100	500203100
Spindle motor power	KW	18.5	18.5	18.5	18.5

The product is continuously improved; the sample images and specifications are for reference only, and the contract’s technical specifications shall prevail.

Specification/Model:		MC75 Series Gantry Surface Grinder
Aircraft model	Unit	MC7520-3000	MC7520-4000	MC7520-6000	MC7516-8000
Workbench
Length × Width	mm	3000*1600	4000*1600	6000*1600	8000*1600
Workbench guide rail type		Hydrostatic guideway	Hydrostatic guideway	Hydrostatic guideway	Hydrostatic guideway
Maximum workbench load	kilogram	5500	7000	11000	14000
T-slot specifications	mm	22	22	22	22
Processing range
Door width	mm	2100	2100	2100	2100
X/Y/Z axis travel range	mm	3000/2100/800	4000/2100/800	6000/2100/800	8000/2100/800
Distance from the grinding wheel to the worktable surface	mm	0-800	0-800	0-800	0-800
Movement speed and feed rate
Worktable travel speed	m/min	3-30	3-30	3-30	3-30
Crossfeed rate of the grinding head	m/min	0.1-3	0.1-3	0.1-3	0.1-3
Vertical travel speed of the grinding head	m/min	•0.05-2	0.05-2	0.05-2	0.05-2
Minimum lateral feed rate of the grinding head	mm	0.005	0.005	0.005	0.005
Minimum vertical feed rate of the grinding head	mm	0.003	0.003	0.003	0.003
Spindle system
Spindle type	mm	Hydrostatic spindle	Hydrostatic spindle	Hydrostatic spindle	Hydrostatic spindle
Spindle taper		1:5	1:5	1:5	1:5
Grinding wheel dimensions	mm	500203100	500203100	500203100	500203100
Spindle motor power	KW	18.5	18.5	18.5	18.5

The product is continuously improved; the sample images and specifications are for reference only, and the contract’s technical specifications shall prevail.

Specification/Model:		MC75 Series Gantry Surface Grinder
Aircraft model	Unit	MC7525-4000	MC7525-6000	MC7525-8000	MC7525-12000
Workbench
Length × Width	mm	4000*2000	6000*2000	8000*2000	12000*2000
Workbench guide rail type		Hydrostatic guideway	Hydrostatic guideway	Hydrostatic guideway	Hydrostatic guideway
Maximum workbench load	kilogram	8000	10000	12000	16000
T-slot specifications	mm	22	22	22	22
Processing range
Door width	mm	2600	2600	2600	2600
X/Y/Z axis travel range	mm	4000/2600/800	6000/2600/800	8000/2600/800	1200/2600/800
Distance from the grinding wheel to the worktable surface	mm	0-800	0-800	0-800	0-800
Movement speed and feed rate
Worktable travel speed	m/min	3-30	3-30	3-30	3-30
Crossfeed rate of the grinding head	m/min	0.1-3	0.1-3	0.1-3	0.1-3
Vertical travel speed of the grinding head	m/min	0.05-2	0.05-2	0.05-2	0.05-2
Minimum lateral feed rate of the grinding head	mm	0.005	0.005	0.005	0.005
Minimum vertical feed rate of the grinding head	mm	0.003	0.003	0.003	0.003
Spindle system
Spindle type	mm	Hydrostatic spindle	Hydrostatic spindle	Hydrostatic spindle	Hydrostatic spindle
Spindle taper		1:5	1:5	1:5	1:5
Grinding wheel dimensions	mm	500203100	500203100	500203100	500203100
Spindle motor power	KW	22	22	22	22

The product is continuously improved; the sample images and specifications are for reference only, and the contract’s technical specifications shall prevail.