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RK Drums
How-To Guide

Commercial Nut Roaster Machines — 2 to 12 lb Batches


A nut roaster that shows you the temperature

Most small-scale nut roasting happens in an oven or an air fryer, and most of it is guesswork — no temperature reading, no control over applied heat, and a product that burns in seconds.

An RK Drum is a rotisserie drum roaster that installs into a standard rotisserie gas grill. Solid 304 stainless, 16 gauge, TIG-welded throughout, no rivets, lifetime warranty on the drum. Add the RoastPilot controller and a thermocouple in the rotisserie handle reads the nuts directly.

What makes it a nut roaster

Shorter vanes. The vanes are the ribs inside the drum that lift and tumble the product, and their length is sized to what you are roasting. A peanut in the shell or a pecan half is many times the size of a coffee bean and needs more clearance to toss. Vanes cut for coffee do not leave enough room, so the nuts do not tumble properly and do not roast evenly. We cut them shorter — same drum, same steel, same welds, different vane geometry, specified at build time. We can do that because every RK Drum is built to order in our own shop rather than stamped out to one pattern.

Real temperature. Nuts give no audible cue and burn fast. A probe in the product is the difference between a repeatable roast and an expensive tray of carbon.

Choose Nuts as the primary roasted product when you order and the drum is built accordingly.

Pick your size

SizeBest forKit with RoastPilot
2 LBLearning, small gift batches 2 LB Everything Kit + RoastPilot
4 LBFarmers markets, holiday runs 4 LB Everything Kit + RoastPilot
6 LBRegular market stall or side business 6 LB Everything Kit + RoastPilot
8 LBSteady commercial production 8 LB Everything Kit + RoastPilot
12 LBVolume production 12 LB Everything Kit + RoastPilot

Already have a grill and rotisserie motor? Buy the drum on its own or the controller on its own.

In-shell needs the room

If you are roasting peanuts in the shell, size up. Shell is bulk without weight, so a batch takes far more drum volume than the same weight shelled. The 12 LB drum's recommended working volume runs from about half a pound to fifteen, which is unusually wide and useful when you switch between in-shell and shelled.

Cool them fast, or the roast continues

Nuts are oily and hold heat. At two pounds a box fan and a colander will do; from six pounds up a Model R or Model F cooler stops being an accessory and becomes part of the roaster. See temperature and time for why this matters more with nuts than with coffee.

Roasting nuts commercially, or want a drum built to a particular spec? Email us — we build to customer specification.

Common questions

Do you sell a dedicated nut roaster machine?

Yes — the same drum body as our coffee roasters, built with shorter internal vanes because nuts are physically much larger and need more clearance to toss. Sizes run 2 to 12 lb. Choose Nuts as the primary roasted product when you order and it is built accordingly.

What size nut roaster do I need for peanuts in the shell?

Size up compared with shelled. Shell is bulk without weight, so in-shell peanuts take far more drum volume for the same finished weight. The 12 LB drum works from roughly half a pound to fifteen, which is a useful range if you switch between in-shell and shelled.

Can the same drum roast nuts and coffee?

The grill, motor and controller are shared, and a short-vane drum still roasts coffee. The technique differs more than the hardware: nuts give no audible cue, they are far oilier so they carry heat and burn faster, and the usable window is much narrower.

Do I need a cooler for roasting nuts?

More than you do for coffee. Nuts are between a quarter and three-quarters fat and that fat holds heat, so they keep roasting after they leave the drum. Up to about two pounds a box fan and a colander works; from six pounds up a forced-air cooler is worth it.