About this case study: this is an illustrative scenario built from the problems processors most often bring to us, not the record of one named factory. The “before” figures are round example numbers, not measurements of any particular brand. Swap in your own figures to see what the change would mean for your line.
The starting point
Picture a mid-size processor cutting 2,000 kg of raw cashew nuts (RCN) a day. The cutting room runs a mix of older piston-style machines built to an Indian design and a batch of Chinese-made cutters bought through a trader. The machines still run, but three problems keep coming back:
- Broken kernels creep up whenever the nut size grade gets smaller or more mixed, which is most weeks.
- A pile of uncut nuts builds up beside every cutter and has to be re-fed or opened by hand.
- Lines stop while waiting for parts. Blades and springs come through the trader, and nobody at the other end knows the machine well.
None of these shows up as a breakdown. They show up as lower kernel value, extra labour and lost days.
What changes at the cutting stage
OUTTURN machines use a rotary mechanism: each nut sits in a cup that turns past a fixed blade, rather than being struck by a piston. That gentler, continuous pass is what keeps breakage down on small and mixed-size grades. (For the full mechanical comparison, see Vietnam vs India cashew cutting machines.)
| Cutting-stage measure | Example “before” figure | OUTTURN rotary cutter |
|---|---|---|
| Broken kernels | 8% | Under 3%; under 1% with well-graded, evenly steamed RCN |
| Uncut nuts | 12% | Under 5%; lower still at a reduced motor speed |
Two points matter when reading this table. First, these are cutting-stage figures only. The whole-kernel outturn quoted on our machine pages (around 72–77%, depending on the model) is a different number: it is measured after complete processing, meaning steaming, cutting, drying, peeling and grading. Second, the best cutting results depend on the nuts you feed in. Grade RCN by size and steam it evenly, and broken kernels at the cutter can fall below 1%.
The uncut rate can also be tuned. Slowing the motor brings the uncut share down further, at the cost of some hourly throughput. You set that trade-off according to what matters more that week.
What those percentages mean in a working day
Assume the 2,000 kg of RCN yields around 500 kg of kernel a day. Using the example figures above:
- Broken kernels: 8% of 500 kg is 40 kg of broken kernel a day. Under 3%, it is at most 15 kg. That is 25 kg a day moved from broken grades to wholes, or more than 6,000 kg across a 250-day season. Every one of those kilos sells at the whole-kernel price instead of the broken-grade discount.
- Uncut nuts: 12% of 2,000 kg is 240 kg of nuts to handle a second time. Under 5%, it is at most 100 kg. That is 140 kg a day less rework, and fewer nuts opened by hand, which is slow work that can damage kernels.
Run the same arithmetic with your own daily volume and your current broken and uncut figures. If you have never measured them, weigh the broken kernel and the uncut nuts from one full shift. It takes an hour and tells you more than any brochure. The true KOR calculator then shows where the cutting stage sits in your overall loss.
Spare parts: the cost that never shows on the invoice
A cutting machine is only as good as the blade in it. When the old line waits two weeks for a set of blades from a trader, the real cost is not the price of the blades. It is two weeks of lower output, or a stopped line in the middle of the season.
OUTTURN makes its machines and their spare parts in-house at our factory in Bình Phước, Vietnam. That means:
- Genuine parts, made to the same drawings as the machine they fit.
- Factory-direct prices, with no trader or distributor margin added.
- In-stock parts dispatched within 48 hours of order confirmation.
- Direct answers from the people who build the machine, not a reseller reading from a catalogue.
A simple blade routine
A worn blade is one of the main causes of broken kernels. Our recommended routine is short:
- Clean daily. Remove shell debris and CNSL build-up at the end of every shift.
- Sharpen weekly. Use the factory-matched sharpening jig so every head keeps the same edge.
- Replace every 2–3 months, depending on workload. Keep one spare set on site so a replacement never waits for freight.
Making the switch without stopping production
Few processors can shut a cutting room for a changeover. The practical approach is to replace the worst-performing machines first, run the new cutters alongside the old ones for a few weeks, and compare broken and uncut figures shift by shift on the same nuts. That comparison, on your own RCN, is the case study that really counts.
Tell us your daily RCN volume, nut size grades and current broken and uncut figures, and we will recommend a head count and setup. Contact us or compare models on the 8-head and 12-head machine pages.