A cashew processing machine line turns raw nuts into clean, gradable white cashews through a fixed sequence: size sorting, steam conditioning, cutting and shelling, drying, peeling, grading, and packaging. CASHEW TECH supplies each machine on its own and as one integrated line, and manufactures and installs turnkey cashew processing plants sized from 2 to 50 tons of raw nuts per day on a single 8-hour shift. This guide maps the flow, the real throughput of each machine, and how to match a configuration to your output target.
Whether you’re setting up a first small-scale unit or expanding a running factory, the right cashew processing machinery is the one matched to your raw material, your labour market, and your outturn target. Below, each stage is broken down by function and capacity, followed by a throughput table, a grade reference, and answers to the questions buyers ask most.
What a Cashew Processing Machine Line Includes
At heart, the line is not one device but a coordinated set of stations, each with its own electric control panel. Raw nuts — known as kaju across India and much of South Asia — arrive uneven in size and moisture, so the sequence begins by sorting and conditioning them before a single shell is cut. The output of each station feeds the next: undersized cutting upstream creates breakage downstream, and under-dried product tears during peeling. Because the stations are interdependent, CASHEW TECH specifies them as a matched set rather than a box of parts.
Material movement between stations can be manual, semi-automatic, or fully conveyor-linked. That choice — not the machines themselves — is usually what separates a modest small-scale unit from a high-throughput automatic line, and it is where most of the capital and layout decisions are made.
The Processing Flow, Stage by Stage
The sequence below is the backbone of every plant. Each stage names the equipment that performs it and its real throughput.
Raw Nut Sizing and Steam Conditioning
Raw nuts first pass through a rotary size grader, sorting them into grades before a single blade touches them — calibrating by size is what lets a fixed blade gap cut cleanly, and it is the biggest single lever on whole-nut recovery. The graded nuts are then steam-conditioned in a cashew steaming machine (roughly 1 ton per batch), fed by a wood-chip or biomass cashew boiler (from 300 kg of steam capacity per hour). Steam softens the shell and loosens the nut from the shell wall, so the cut releases a whole cashew instead of crushing it — and steaming, rather than open roasting, keeps the valuable cashew nut shell liquid (CNSL) intact for later extraction.
Cutting and Shelling
Shelling is the most labour-intensive step in the whole factory, which is why it is the first place automation pays back. A modern cashew shelling machine uses paired blades that open along the natural curve of the nut. CASHEW TECH supplies two standard cutter formats and an integrated line:
- 8-head cutter — 8 heads / 16 blades — around 250 kg of raw nuts per hour.
- 10-head cutter — 10 heads / 20 blades — around 300 kg of raw nuts per hour.
- Integrated triple-sieve line — an automatic feeder paired with multiple cutting units — a combined 1,000 to 1,200 kg per hour.
After cutting, a scooping station lifts the loosened nut away from the shell. Shelling done this way replaces dozens of hand-cutting seats while holding a higher, more consistent whole-nut rate — provided the nuts were properly size-graded first.
Drying and Humidification
Freshly shelled nuts still carry the thin brown testa and too much moisture to peel cleanly. A cashew dryer machine — tray or borma type, handling 500 to 2,000 kg per batch — brings moisture down so the testa turns brittle and lifts away. The nuts then rest in a humidification (conditioning) room to bring moisture back up just enough that the nut stays flexible and whole while the skin stays loose. This dry-then-condition step is the quiet difference between a factory that ships mostly wholes and one that ships mostly pieces.
Peeling — Testa Removal
An automatic cashew peeling machine removes the red-brown testa at 100 to 400 kg of kernel per hour, with a peeling rate around 98% and breakage under 10%. Gentle airflow and a rubbing action strip the skin without cracking the nut. Any stubborn pieces are diverted to a manual touch-up table rather than forced through, protecting the whole-nut grade that commands the highest price.
Grading, Sorting, and Colour Sorting
Peeled nuts are graded by size and colour. A cashew nut sorting machine handles raw cashew sorting at up to 2 tons per hour, and an optical colour sorter separates white wholes from scorched or spotted product and from pieces. This is the station that assigns your output to named grades — W320, W240, and the rest — and therefore sets the price per kilogram you can invoice.
Roasting, Flavouring, and Vacuum Packing
For salted, roasted, or flavoured kaju, a cashew roasting machine in 50, 70, or 100 kg batch sizes (or a continuous tunnel type at 40–60 kg/hour) finishes the product. Final packing is done on a vacuum packing machine — into tins, pouches, or nitrogen/CO₂-flushed packs — which protects flavour and shelf life all the way to the buyer. Sealing is the last controllable point where a whole-nut grade can be protected or lost.
Capacities at a Glance: Throughput by Stage
Use this table to size a line against a daily target. Figures are per machine on an 8-hour shift; a turnkey line balances these so no single stage starves or floods the next.
| Stage | Machine | Typical throughput | Configuration note |
|---|---|---|---|
| Raw-nut sizing | Rotary size grader | Line-matched | Grades nuts before cutting |
| Steam conditioning | Boiler + steaming unit | 300 kg steam/hr · 1 ton/batch | Wood-chip / biomass fired |
| Cutting & shelling | 8-head cutter | 250 kg/hr raw | 8 heads / 16 blades |
| Cutting & shelling | 10-head cutter | 300 kg/hr raw | 10 heads / 20 blades |
| Cutting & shelling | Integrated triple-sieve line | 1,000–1,200 kg/hr raw | Automatic feeder + multiple cutting units |
| Drying | Tray / borma dryer | 500–2,000 kg/batch | Drops moisture for peeling |
| Peeling | Automatic peeler | 100–400 kg/hr | Removes testa, ~98% peeling rate |
| Sorting & grading | Raw sorter + colour sorter | Up to 2 tons/hr | Sorts size, colour, wholes vs pieces |
| Roasting | Batch roaster | 50 / 70 / 100 kg/batch | For salted / flavoured kaju |
| Packing | Vacuum packing machine | Line-matched | Tins, pouches, gas-flush |
Manual vs Automatic Cashew Machinery
The honest trade-off is labour versus capital. Manual and semi-automatic lines cost less to install and can hold an excellent whole-nut rate in skilled hands, but they need a large trained workforce and their output swings with it. Automatic cashew machinery raises steady throughput, cuts the headcount at the cutting and peeling stations most, and standardises quality — at a higher upfront cost and a real need for maintenance discipline. Most buyers land on a hybrid: automatic cutting and grading, with a manual touch-up where a human eye still beats a sensor. See the full comparison in automatic vs manual cashew cutting.
Choosing the Right Cutter
The cutter is where whole-nut value is won or lost, so match it to raw material first and throughput second. A cutter with more heads is not automatically better — it only outperforms if upstream sizing keeps every nut in the blade’s working range. For first-time buyers, see the complete guide to choosing your first cutting machine.
Turnkey Cashew Processing Plants: 2 to 50 Tons a Day
Beyond individual machines, CASHEW TECH designs and installs complete turnkey lines. A turnkey cashew processing plant is engineered around a daily raw-nut target — from a 2-ton starter unit to a 50-ton industrial factory on one 8-hour shift — and covers boiler and steam sizing, machine selection, floor layout, conveying, power, and effluent handling. Cost turns almost entirely on automation level and civil works — see the cost of setting up a plant and how to start a cashew processing business for planning detail.
Outturn (KOR) and Whole-Nut Recovery
Equipment only pays back if it protects your yield, and two numbers govern the economics. Outturn (KOR) is measured as pounds of usable kernel recovered from one 80 kg bag of raw nuts: below 40 is usually rejected, 47–50 is good, and 50–54 is excellent. Whole-nut recovery is the share of that yield that stays unbroken — the wholes that earn premium grades. Model your own figures with the cashew outturn calculation formula and KOR calculator and the raw cashew nut to cashew kernel ratio guide.
The Grades Your Line Produces
Grading and colour sorting split output into internationally traded grades. White whole kernels are counted per pound: W240 runs about 220–240 to a pound (larger, premium), and W320 about 300–320 (the most widely traded grade). Smaller wholes, scorched wholes, and pieces — splits, butts, and small white pieces — round out the mix. Cleaner cutting and drying push more of the kernel into whole grades and out of low-value pieces. Full detail lives in the cashew grades reference, with dedicated pages for W320 cashews and W240 cashews.
Installation, Commissioning, and Support
Buying equipment is the start, not the finish. CASHEW TECH supports layout, installation, commissioning, and operator training so a line reaches its rated output rather than a fraction of it — poor setup is a common reason a factory underperforms its spec sheet. See processing training, installation and maintenance for the full scope of support.
Explore the Machine Range
Browse the complete lineup from the machines hub. The stations most buyers start with are the cashew shelling machine, the cashew cutting machine, the cashew peeling machine, the cashew dryer machine, the biomass boiler, and the ready-to-run small-scale processing line. The hub lists all twenty machines in real process order, from harvesting through vacuum packing.
Guides and Resources
New to the industry? Start in the resources hub with the cashew manufacturing process walkthrough, then read up on the costs of a processing plant, setting up a HACCP-certified plant, and optimising processing yield. For price and market context, see cashew kernels price per kg and cashew nut producing countries.
Why Buyers Choose CASHEW TECH
CASHEW TECH manufactures its own processing machinery in Ho Chi Minh City, Vietnam, and consults on turnkey plant setup — so the line you buy is specified, built, and supported by the same team, not assembled from a catalogue of third-party suppliers. From a first 2-ton unit to a 50-ton factory, the goal is the same: predictable outturn, protected whole grades, and a line that hits its rated capacity. Learn more about CASHEW TECH and our processing solutions and services.
Request a Quote
Tell us your raw-nut origin, target daily capacity, and automation preference, and we’ll size a line and quote it. Request a quote or book a consultation, or message us directly on WhatsApp from the button in the corner of any page.
Frequently Asked Questions
What is a cashew processing machine?
It is any of the coordinated machines that convert raw nuts into clean, graded white cashews — size grader, steam boiler, cutting and shelling unit, dryer, peeler, grader/colour sorter, roaster, and vacuum packer. They are usually installed as a matched line so each stage feeds the next at balanced throughput.
How much does the equipment or a full plant cost?
It depends almost entirely on capacity and automation level. A small-scale manual-leaning unit costs a fraction of a fully automatic high-throughput factory, and civil works and boiler sizing move the total further. Because prices are project-specific, see the plant cost guide and request a quote for your configuration.
Can cashews be processed entirely by machine?
Almost. Cutting, drying, peeling, grading, and packing are all automated, and a fully automatic integrated line runs at 1,000–1,200 kg/hr through cutting. Most factories still keep a small manual touch-up at peeling and final sorting, where a human eye protects the whole grade better than any sensor.
What is the process of processing cashews?
Size sorting → steam conditioning → cutting and shelling → drying → humidification → peeling → grading and colour sorting → optional roasting → vacuum packing. Each stage has its own machine and throughput; the cashew manufacturing process guide is the full walkthrough.
How much finished cashew do I get from raw nuts?
Roughly 22–24% by weight — about one kilogram from four kilograms of raw nuts — expressed in trade as outturn (KOR), where 47–50 lbs per 80 kg bag is good and 50–54 is excellent. Model your own numbers with the outturn calculator.
What plant capacity should I start with?
Turnkey plants run from about 2 tons/day for a starter unit to 50 tons/day for an industrial factory on one 8-hour shift. The right starting size depends on raw-nut supply, working capital, and labour — the how to start a cashew business guide walks through it.