EQUIPMENT MODEL
NVG-7500 · Silicon ingot face grinding and rounding centre
TDG NISSIN ↗Once a wire saw has squared an ingot, the NVG-7500 finishes it. TDG NISSIN describes a vertical centre that grinds the faces and rounds or chamfers the edges of mono ingots and poly blocks, with rotary stations so loading and grinding overlap.
Figures come from the NVG-7500 catalogue table. The photo carries the label NVG-7500A, and the text and table give different length figures, so ask which revision you are being quoted.
General illustration of wafer processing equipment, not a photograph of this model. Ask the manufacturer for current photographs and layout drawings of the configuration offered.
START WITH YOUR PRODUCTION TASK
Choose the NVG-7500 when you want face and edge finishing in one machine. Send your incoming size and the final face and chamfer drawing, then have the maker put the model revision, length limit, wheel package and accepted trial finish into the written offer.
SOURCE-LINKED DATA
Published specifications
Values below are published by the manufacturer, each with the date its source was checked. Ask for the figures that apply to your configuration and material in the quotation.
The manufacturer has not published a complete specification table for this entry. Request the exact offered drawing and operating limits.
01 · Manufacturer information
How the NVG-7500 finishes an ingot
The machine combines face grinding with rounding or chamfering. Workpieces move between rotary stations and are ground in a reciprocating pass. TDG NISSIN says station changes involve no waiting and that fast unloading starts from the third workpiece. No cycle time or station timing is listed, so ask for both.
Two figures need a straight answer before you plan around them. The text gives a maximum workpiece length of 900 mm, while the table gives a machining height of 80–800 mm. The table names the model NVG-7500, while the photo shows NVG-7500A. They may refer to different axes or revisions. Ask TDG NISSIN for a drawing that settles both, and plan on the smaller figure until it arrives.
Sources: TDG NISSIN NVG-7500 product pageNVG-7500 bilingual specification table
02 · Manufacturer information
NVG-7500 catalogue figures
| Item | Catalogue value | Buyer note |
|---|---|---|
| Stock size | Side 156–160 mm; diameter 8–10 inches | Send your block or ingot drawing. |
| Length / height | Text: up to 900 mm; table: 80–800 mm machining height | Ask which axis and revision each figure refers to. |
| Wheel speed | Up to 3000 rpm | Feed and finish depend on the grinding recipe. |
| Rough wheels | 300 mm diameter, 80#, two wheels | Ask for abrasive, bond and dressing details. |
| Finish wheels | 296 mm, 800#, one; 320 mm, 800#, one | Grit shown as printed in the catalogue. |
| Head lift | 1050 mm; 0–2700 mm/min | Travel speed, separate from grinding feed. |
| Water / air | 0.2–0.3 MPa, 70 L/min; air 0.6–0.7 MPa, up to 2 m³/h | Plan coolant filtering and supply. |
| Power | AC 380 V, 50 Hz; 45 kW | Rated machine power for sizing the feed. |
| Footprint / mass | 4230 L × 2900 W × 3100 H mm; 14000 kg | Add room for rotary access and service. |
Sources: TDG NISSIN NVG-7500 product pageNVG-7500 bilingual specification table
03 · PVYard procurement analysis
What to send with your enquiry
Workpiece drawings
Incoming ingot or block size, the finished face, rounding or chamfer drawing, the stock you allow to remove and the fixture reference faces. Mono bars often arrive from a squarer such as the maker's two-station squarer.
Surface targets
Flatness, roughness, chip and crack limits and any subsurface damage requirement, each with the measuring method you will use.
Wheels and coolant
Ask for the rough and finish wheel material, bond, dressing and replacement plan, plus the coolant and filtration setup. A grit number on its own says little about the finish you will get.
Model and stations
Ask whether NVG-7500 or NVG-7500A is quoted and which length figure applies. Request station, loading and maintenance drawings.
Sources: TDG NISSIN NVG-7500 product pageNVG-7500 bilingual specification table
04 · PVYard procurement analysis
Running the grinding trial
Freeze the setup
Agree model, stock range, fixtures, wheels and final geometry in writing.
Check finished parts
Measure dimensions, surface and damage at set positions after the full rough and finish sequence.
Time the whole cycle
Include clamping, station change, unloading and cleaning, and run both the smallest and the largest stock you plan to grind.
See it serviced
Watch a wheel dressing and change, coolant upkeep and how a part stopped mid-cycle is handled. Record accepted output over a sustained run.
Sources: TDG NISSIN NVG-7500 product pageNVG-7500 bilingual specification table
05 · PVYard procurement analysis
NVG-7500 buyer questions
Can the NVG-7500 grind a 900 mm long ingot?
The text says 900 mm, yet the table lists 80–800 mm machining height. Ask for a drawing that shows which axis each figure covers.
Is the machine in the photo an NVG-7500A?
The photo is labelled NVG-7500A and the table says NVG-7500. Ask TDG NISSIN which revision your quotation covers.
What roughness does the 800# finish wheel give?
The catalogue lists no measured finish. Ask for a sample result on your own stock with the full wheel and coolant recipe.
Sources: TDG NISSIN NVG-7500 product pageNVG-7500 bilingual specification table
TURN THIS INTO A CLEAR REQUEST
Ask about this product
Include the product-specific questions above and replace every bracket with your actual requirement. Save your edited text to your sourcing brief, then review it before submitting an enquiry. Saving a brief does not send it to a manufacturer.
Sources
Manufacturer information and our buying guidance are labelled section by section above. Each source below shows the date it was checked.
TDG NISSIN NVG-7500 product page ↗
Source check: 2026-10-11 · Describes face grinding, rounding, chamfering and the rotary station layout, with the 900 mm length figure.
NVG-7500 bilingual specification table ↗
Source check: 2026-10-11 · Both language links lead to one table naming NVG-7500; the machine photo on it reads NVG-7500A.