Step-by-Step Guide: Nut Shelling Process from Start to Finish

Shelling nuts may sound simple, but doing it right requires the right process and equipment—especially when you're working in large quantities. Whether you’re shelling peanuts, almonds, or other hard-shelled varieties, having a structured method improves efficiency, saves time, and protects the kernel quality.

In this step-by-step guide, we’ll walk you through the full nut shelling process from intake to final output.

1. Pre-Cleaning the Nuts

Before shelling, it's essential to remove dirt, stones, leaves, and other debris.

• How it's done: Use a nut cleaning machine or manual sorting.

• Why it matters: Clean nuts reduce machine wear and improve shelling accuracy.

2. Drying the Nuts

Drying reduces moisture in the shells, making them easier to crack cleanly.

• Natural drying: Spread nuts under the sun for a few days.

• Machine drying: Use a nut dryer for faster, more controlled results.

Tip: Over-drying can damage kernels; maintain optimal moisture content (usually 8-10%).

3. Grading or Sizing

Not all nuts are the same size, and uniformity helps the shelling machine work better.

• Grading machines separate nuts by size.

• Why it's important: Consistent size allows even pressure during shelling, reducing breakage.

4. Shelling the Nuts

This is where the actual breaking of the shell happens using a nut shelling machine.

• Types of machines:

  • Small-scale manual shellers

  • Semi-automatic models

  • Fully automatic shelling lines

• How it works: The machine cracks the shell using rollers or compression plates, then separates the kernel from the shell.

Understand how to choose the nut shelling supplier for your business.

5. Kernel & Shell Separation

After cracking, kernels and shells are mixed together. This step removes shell fragments.

• Methods used:

  • Airflow separators

  • Vibrating screens

  • Gravity separation

• Goal: Leave behind clean, whole kernels ready for use or packaging.

6. Final Cleaning & Quality Check

Some leftover shell pieces may still remain. A final cleaning ensures kernel purity.

• Manual sorting or optical sorting is used for this step.

• Quality control: Check for kernel breakage, discoloration, or defects.

7. Packaging or Further Processing

Once cleaned and sorted, the kernels are either packaged for sale or sent for roasting, oil extraction, or other uses.

• Packaging options: Vacuum sealing, plastic pouches, or bulk sacks.

• Storage tip: Store in a cool, dry place to avoid spoilage.

Bonus: Machine Maintenance Tips

To keep your shelling line running efficiently:

• Clean machines daily after use

• Lubricate moving parts regularly

• Replace worn-out components on time

• Monitor for unusual noises or vibrations

Conclusion

From cleaning and drying to shelling and sorting, every step in the nut shelling process plays a role in final product quality. By using the right nut shelling machine and following a clear workflow, you’ll get high-yield, clean kernels with less waste and effort.

Whether you’re a small farm or large processing unit, Feng-De’s nut shelling machines help make every step easier, faster, and more effective.