EQUIPMENT MODEL
NWSS-840 · Adjustable multiwire monocrystal cropper
TDG NISSIN ↗A multiwire cropper for monocrystalline ingots that makes seven cuts in one setup to give six segments, with adjustable cut length and automatic centring.
TDG NISSIN lists the NWSS-840 twice in its catalogue with matching descriptions, and both entries are covered here. The data sheet gives 8 or 9 inch diameters; one catalogue summary gives 8–12 inch and seven heads.
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
Pick the NWSS-840 for cutting long mono ingots into several segments in one setup. Confirm the diameter, approve a cut map with head, tail and sample allowances, then trial length changes, finished geometry and the handling of long ingots from start to finish. For three shorter ingots cropped side by side, compare the maker's three-ingot cropper.
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
Six segments from one long ingot
The NWSS-840 takes a monocrystalline ingot 1800–4000 mm long and makes seven cuts to give six segments. Cut length can be set anywhere between 300 and 700 mm. TDG NISSIN says the machine centres the ingot by itself and changes cut length without cutting the wire, and that it also crops head and tail ends and takes samples. After cropping, round mono segments are usually squared next, and the maker's two-station squarer handles that job.
The model appears twice in the TDG NISSIN catalogue with near-identical text, so both entries are combined on one page. The two differ on size: one catalogue summary says 8–12 inch stock and seven heads, while the data sheet lists 8 or 9 inch diameters.
Some mixes of cut lengths will not fit a given ingot. The sheet has no diagram showing where samples, cut-off ends and the six segments fall for each stock length, so send your own cut map with the enquiry.
Sources: TDG NISSIN catalogue page: NWSS-840 cropperNWSS-840 data sheet
02 · Manufacturer information
NWSS-840 data sheet figures
| Item | Sheet value | Ask about |
|---|---|---|
| Quantity | Six segments / seven cuts | A cut map with kept, rejected and sample pieces. |
| Incoming / cut length | 1800–4000 mm / 300–700 mm | Which combinations fit your ingots. |
| Diameter | 8 or 9 inches on the sheet; 8–12 inch in a catalogue summary | Which diameters the machine you order accepts. |
| Wire / speed | Coated 0.33–0.42 mm; 0–1200 m/min | Kerf and feed on your ingots. |
| Tension | 0–150 N; cylinder control | The process setting offered. |
| Fast lift / feed | Lift 400 mm at 0–500 mm/min; cutting feed 0–40 mm/min | These are two separate motions. |
| Wire spool | Up to 10 km at 0.42 mm | Expected wire life in use. |
| Water ports | 1 inch quick-connector inlet; diameter 100 corrugated outlet | Flow and temperature figures. |
| Air | 0.5–0.6 MPa; 10 m³/h; diameter 16 mm pressure hose | Your site air supply. |
| Power / size / mass | About 29 kW; 5500 L × 1900 W × 2400 H mm; about 9 t | The full installation package. |
Sources: TDG NISSIN catalogue page: NWSS-840 cropperNWSS-840 data sheet
03 · PVYard procurement analysis
Questions for the NWSS-840 quotation
Ingots and pieces you keep
Give the spread of incoming diameter and length, the head and tail allowance and every segment and sample you keep. Check the chosen cut lengths add up within the ingot.
Adjustment and centring
Ask for head and fixture positions, the allowed adjustment sequence and the reference used for automatic centring. Ask to see a length change made with the wire left in place.
Measurement and damage
Set limits for cut position, segment length, face geometry and sample condition, with methods and allowed chips and cracks. Ask which coated diamond wire and wire diameter suit your segment faces.
Handling and cooling
Get the long-ingot support and handling, cooling flow, temperature and filtration, and the waste package. Port sizes alone tell you nothing about cooling demand.
Sources: TDG NISSIN catalogue page: NWSS-840 cropperNWSS-840 data sheet
04 · PVYard procurement analysis
Trialling length changes and output
Settle diameter and cut map
Approve the configuration, your actual ingots and a drawing of kept, rejected and sample pieces.
Watch a length change
See adjustment and centring done with the agreed procedure and the settings recorded.
Measure every piece
Inspect all six segments and the samples for size, geometry and damage.
Run full cycles
Include loading, support, cut-offs and unloading. Test a wire fault and a centring fault and keep track of part-cut ingots.
Sources: TDG NISSIN catalogue page: NWSS-840 cropperNWSS-840 data sheet
05 · PVYard procurement analysis
Adjustable ingot cropping questions
Why does one page cover two catalogue listings?
Both name the NWSS-840 with matching text. Putting them together keeps the size difference between them in plain view.
Does the NWSS-840 take 12-inch ingots?
The data sheet lists 8 or 9 inches, while one catalogue summary says 8–12 inch. Have TDG NISSIN state in writing which diameters your machine will handle.
How thick are the sample slices?
TDG NISSIN publishes no cut map or sample thickness. Define both in the configuration you order.
Sources: TDG NISSIN catalogue page: NWSS-840 cropperNWSS-840 data sheet
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 catalogue page: NWSS-840 cropper ↗
Source check: 2026-10-11 · Describes automatic centring, head and tail cropping, sampling and adjustable length.
NWSS-840 data sheet ↗
Source check: 2026-10-11 · Bilingual sheet listing 8 or 9 inch diameters and the six-segment layout; request the current issue.
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