Used TAIYO KOKI NVG-8T CNC Vertical Grinder

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This is a used TAIYO KOKI NVG-8T CNC vertical grinding machine, originally made in Japan and equipped with a FANUC 32i CNC control. It is designed for precision internal and external grinding of medium to large components. The machine features an approximately Ø750 mm rotary table, a maximum grinding diameter of about Ø800 mm, and a table load capacity of up to 700 kg. It is suitable for precision grinding applications in bearings, gears, hydraulic components, automotive parts, and other high-accuracy rotational workpieces.

Product Description

Pre-owned TAIYO KOKI NVG-8T CNC vertical grinding machine made in Japan, equipped with a FANUC 32i CNC control. Designed for precision internal and external grinding of medium-to-large cylindrical components, it offers up to Ø800 mm grinding capacity, a Ø750 mm rotary table and a 700 kg table load. Recorded power-on time is approximately 1,333 hours, with about 705 operating hours. A strong option for manufacturers looking for Japanese precision grinding capability without the investment required for a new machine.

Technical Specifications

Specification	Details
Machine Type	CNC Vertical Grinding Machine / Vertical Grinder
Condition	Used / Pre-owned
Manufacturer	TAIYO KOKI
Model	NVG-8T
Country of Origin	Japan
CNC Control	FANUC 32i / FANUC Series 32i-Model A
CNC Display	10.4-inch color LCD
Maximum Internal Grinding Diameter	Approx. Ø45–Ø800 mm
Maximum External Grinding Diameter	Ø800 mm
Internal Grinding Length	325 mm for workpieces up to Ø250 mm
Internal Grinding Length	500 mm for workpieces Ø250 mm and above
Maximum External Grinding Length	500 mm
Main Spindle Swing	Ø850 mm
Workpiece Height Above Table	600 mm, including fixture
Maximum Table Load	700 kg
Rotary Table Diameter	Ø750 mm
Table Speed	8–200 rpm, stepless
X-Axis Travel	1,200 mm to the right of spindle center / ATC position
X-Axis Travel to Left	300 mm
Z-Axis Travel	725 mm
X/Z Rapid Traverse	0–24,000 mm/min
Minimum Command Increment	0.0001 mm
Internal Grinding Spindle Speed	2,500–10,000 rpm
Internal Grinding Wheel Diameter	Ø40–Ø250 mm
Internal Wheel Max. Peripheral Speed	2,700 m/min
Internal Grinding Spindle Taper	BT50, 7/24 taper
External Grinding Spindle Speed	2,400–3,000 rpm
External Grinding Wheel Size	Ø355 × 65 mm
External Wheel Max. Peripheral Speed	2,700 m/min
Main Spindle Motor	3.7 / 5.5 kW, continuous / 30 min
Internal Grinding Spindle Motor	7.0 kW
External Grinding Spindle Motor	7.5 kW
X-Axis Motor	6.0 kW
Z-Axis Motor	5.5 kW
Hydraulic Pump Motor	0.75 kW
Coolant Pump Motor	1.5 kW
Grinding Spindle Cooling Pump	0.2 kW
Power-On Time	Approx. 1,333 hours
Operating Time	Approx. 705 hours
Machine Structure	Gantry-style structure
Approx. Machine Dimensions	3,340 × 4,050 × 3,200 mm
Tool / Wheel Capacity	6 positions, according to supplied machine information

FANUC 32i CNC Features

CNC Feature	Specification
CNC System	FANUC 32i
Display	10.4-inch color LCD
Manual Pulse Generator	Included
I/O Interface	RS232C
Program Memory	128 Kbyte
Registered Programs	Up to 250
Custom Macro	Custom Macro B
Grinding Fixed Cycles	Supported
Optional Block Skip	4 blocks
Extended Tape Editing	Supported
Handle Interrupt	Supported

Applications & Suitable Industries

The used TAIYO KOKI NVG-8T CNC vertical grinder is suitable for precision internal and external grinding of relatively large, heavy and high-accuracy rotational components.

Typical applications include:

Bearing rings and bearing components
Gear components and precision gear housings
Hydraulic and pneumatic components
Spindles, sleeves and bushings
Motor and gearbox components
Automotive and commercial vehicle parts
Aerospace precision components
Machine tool components
Industrial pump and compressor parts
Large-diameter precision cylindrical parts
Internal bore grinding
External diameter grinding
High-precision finishing of hardened components

Its vertical workholding configuration is especially useful for parts where stable loading of heavier workpieces is preferred compared with conventional horizontal grinding arrangements.

FAQ

Is this TAIYO KOKI NVG-8T a new or used machine?

This is a used / pre-owned TAIYO KOKI NVG-8T CNC vertical grinding machine, originally manufactured in Japan. It is being offered as second-hand industrial equipment and is not represented as a new machine.

What is the maximum grinding capacity of the NVG-8T?

According to the supplied machine documentation, the NVG-8T can handle internal grinding diameters from approximately Ø45 to Ø800 mm and external diameters up to Ø800 mm. The rotary table diameter is Ø750 mm with a maximum table load of approximately 700 kg.

What CNC control does this used TAIYO KOKI grinder have?

The machine is equipped with a FANUC 32i CNC control, with a 10.4-inch color display, manual pulse generator, Custom Macro B, grinding cycles and RS232C interface.

How many operating hours does the machine have?

The CNC information shown in the supplied machine records indicates approximately 1,333 power-on hours and 705 operating hours. Buyers should confirm the current hour readings during final inspection because recorded hours may change if the machine has been operated after the photos were taken.