A small peanut butter line is a compact setup that takes raw peanuts from roasting to a filled, sealed jar without a factory floor. It suits a cottage brand, a farm co-op, or an importer testing a private label before committing to a full plant. You do not need a million dollar budget to begin. This guide lists the machines you need, what each one does, the rough cost you should expect, and a few ways to keep the spend under control while you prove the product sells.

Why start small instead of going all in

The risk in peanut butter is not the grinding, it is the recipe and the market. Roast a shade too dark and the batch tastes bitter. Grind too coarse and customers complain about grit. A small line lets you run ten batches, learn the roast curve, and fix the formula before you have paid for a high-speed line that sits half used. Once demand is real, you add a second grinder or a faster filler. You are not stuck with capacity you cannot fill.

The equipment list

Here is the core line, in the order the peanut travels through it. Skip a step only if you can do it by hand at your volume.

1. Cleaning and sorting

Peanuts arrive with stone, dirt, and the occasional bad nut. A destoner and a hand sort or a simple vibrating screen remove the obvious junk. At low volume you can sort by hand on a table, but the moment you pass a few hundred kilos a week, a small destoner pays for itself in rejected product alone.

2. Roasting machine

Roasting builds the flavor. A batch roaster or a continuous belt roaster heats the peanuts to roughly 160 degrees, then drops them onto a cooling belt so they stop cooking. Roast level is the single biggest lever on taste, so pick a machine with a steady, even temperature rather than the cheapest one you can find.

3. Cooling conveyor

Right after roasting, the peanuts need to cool before grinding or the butter comes out oily and dull. A short cooling belt with a fan does the job. It also gives you a clean handoff point to the grinder.

4. Peanut butter grinder

This is the heart of the line. A commercial peanut butter machine uses a colloid mill to shear roasted peanuts into a smooth, stable paste. The gap between the rotor and stator sets the fineness, and a good unit holds the oil in the butter instead of letting it float on top. If you also plan almond or cashew butter, a nut butter grinder covers the whole range from the same frame. Both sit under the wider colloid mill family we build.

5. Mixing and blending tank

Most peanut butter is not just ground peanuts. You add salt, sometimes sugar, and for crunchy styles you fold back crushed kernels. A stainless steel mixing tank does this cleanly, and a jacketed mixing tank lets you warm the batch slightly so it blends without seizing. Keep this vessel food grade 304 or 316L, because the butter sits in it and any pitting traps old product.

6. Filling machine

Peanut butter is thick, so you need a filler built for paste, not a thin-liquid piston unit. A dual-head paste filling machine meters the butter into jars by volume, drip free, at a steady rate. For a true small start you can fill by hand with a portioning scoop, but the moment you sell more than a few dozen jars a day, a filler saves more time than it costs.

7. Capping and sealing

Glass jars take a lid press or a vacuum sealer that pulls air out before the lid locks. Vacuum sealing matters for shelf life, because trapped air is what turns the surface rancid. If you pack in pouches instead of jars, the same sealer handles the flat format.

8. Labeling and packaging

A bench label applicator is enough at the start. As volume grows you add a packaging machine that feeds, labels, and cartons the jars in one pass. Do not buy this early. A hand crimper and a stack of pre-printed labels will carry you through the first months.

What it costs

The numbers below are indicative market ranges for reference only. Real prices move with capacity, voltage, and whether you want manual or automatic. Treat them as a planning aid and confirm with the supplier before you budget.

Item	Manual / semi-auto	Automatic
Destoner and sort	300 to 1,000	1,500 to 4,000
Roaster	1,500 to 4,000	5,000 to 12,000
Peanut butter grinder	1,500 to 4,000	4,000 to 9,000
Mixing tank	800 to 2,500	3,000 to 7,000
Paste filler	1,000 to 3,000	4,000 to 10,000
Sealer and labeler	500 to 2,000	3,000 to 8,000
Full small line	8,000 to 20,000	25,000 to 50,000

Those figures are in US dollars and exclude freight, import duty, and the stainless steel vessel work that a food line needs to stay inspectable. A manual line under 10,000 dollars can put branded jars on a shelf. An automatic line closer to 50,000 dollars is for a business already shipping pallets.

Space, power, and people

A manual line fits in a room the size of a two-car garage, roughly 30 to 50 square meters, with a three-phase power supply for the grinder and roaster. Plan for a compressed air line if you go automatic on the filler. Staffing is one or two people at manual volume, rising to four or five once the line runs continuously. The bigger hidden cost is hygiene: you need a wash-down floor, food-grade surfaces, and a clean-in-place routine so the grinder and tank do not sour between runs.

How to keep the spend down

Start with the grinder and a hand-fill setup, then add the roaster and filler only after you have steady orders. Buy machines that share the same stainless grade so spares and cleaning are simple. Speaking of steel, the vessels that touch food should be 304 at minimum and 316L where the butter is salty or acidic. Our sister mill stocks both, from 316L plate to 304L bar and tube, if you want to read the metallurgy before you specify.

Where Wanzhi fits

We build the machines that do the grinding, mixing, filling, and sealing, so you can spec them as one line instead of hunting vendors for each step. The peanut butter grinder and the nut butter grinder cover the core, the mixing tank handles blending, the paste filler and vacuum sealer close the jar, and the packaging line scales you up when orders climb. The steel behind those vessels comes from our sister mill, which you can read about on the Wanzhi Steel about page.

Conclusion and next step

Starting a small peanut butter line comes down to three moves: buy the grinder first, prove the recipe on a modest volume, then add roasting and filling as orders arrive. Keep every food contact surface stainless and 316L where it matters, and you avoid the hygiene problems that sink small food brands. If you want a line sized to your actual daily volume and power supply, tell us your target jars per hour and we will quote the grinder, mixer, filler, and sealer as one package.

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