With the growth of the nut processing industry, walnut shelling machines are now key equipment for many farms and factories to improve efficiency.
In traditional walnut processing, manual cracking or simple tools are slow and labour-intensive. The efficiency is low, and the kernels are easily broken. The walnut shelling machine solves this problem. It greatly improves shelling efficiency and keeps a high whole-kernel rate. So, how does an automatic walnut cracking work, and what are the operating steps?
What Is the Working Principle of a Walnut Shelling Machine?
The walnut shelling machine mainly consists of a stator and a rotor. After walnuts enter the machine, they are continuously and evenly squeezed in the gap between the stator and rotor. This pressure breaks the walnut shells quickly. The gap can be adjusted to match different walnut sizes.
For stable shelling and a higher whole-kernel rate, walnuts should be graded before shelling. After grading, adjust the gap according to the walnut size. Then the machine can run continuously for stable batch shelling. This improves efficiency and reduces kernel breakage.
Operating Steps of a Walnut Cracking Machine
Step 1: Grading and Pre-treatment
Before shelling, grade the walnuts to keep the size uniform. Check that the walnuts are dry and free of stones or heavy impurities to ensure good shelling and safe operation.
Step 2: Adjust the Stator–Rotor Gap
Adjust the gap between the stator and rotor according to the walnut size. Run a small test first. Check the shelling result and kernel integrity, then fine-tune the gap if needed.
Step 3: Start the Machine and Feed Evenly
After the machine runs normally without a load, start feeding. Add walnuts evenly and continuously. Do not overload to avoid blockage or uneven shelling.
Step 4: Shelling and Automatic Separation
Walnuts are cracked inside the machine. The shells and kernels are automatically separated by a screen or air system, reducing manual sorting.
Step 5: Check Output and Fine Adjustment
Kernels are discharged from the outlet. Check the shelling cleanliness and breakage rate. If breakage is high or some walnuts are not shelled, adjust the gap and continue.
Step 6: Shutdown, Cleaning, and Daily Maintenance
After work, turn off the power and clean shells and debris inside the machine. Check wear on the stator, rotor, and drive parts regularly to keep stable long-term operation.
Technical Parameters for Reference
| Machine Name | Weight | Output | Power | Size |
| Walnut cracking machine | 180KG | 300KG | 1.5KW(220V) | 1150*810*1320mm |
Advantages of Using a Walnut Shelling Machine
Stable output, high efficiency
Capacity up to 300 kg per hour. Suitable for continuous and large-scale shelling.
Strong power, reliable operation
Equipped with a 1.5 kW (220V) motor. Stable power for long-time operation without overload.
Solid structure, smooth running
Machine weight is 180 kg. Low vibration and more uniform shelling.
Compact size, small footprint
Overall size: 1150 × 810 × 1320 mm. Suitable for workshops, cooperatives, and small factories.
Food-grade stainless steel, safe and hygienic
All contact parts are made of food-grade stainless steel. Corrosion-resistant, rust-free, and easy to clean.
Low breakage rate, high product quality
Adjustable shelling gap ensures even shelling. High shelling rate with low kernel breakage.
How to Choose a Suitable Walnut Shelling Machine?
When selecting a walnut shelling machine, focus on these key points:
- Walnut grading — If your walnuts vary in size, choose a machine with adjustable gaps to handle different sizes, or grade the walnuts before shelling.
- Breakage rate — Pick a machine with low breakage to ensure more whole kernels and higher product quality.
- Processing capacity (kg/h) — Match the machine to your processing volume. High-capacity models for large batches, smaller machines for low or scattered volumes.
- Additional systems — Machines with air or screen separation can automatically separate shells and kernels, reducing manual sorting and improving efficiency.
- Brand and after-sales service — Check the manufacturer’s reputation, after-sales support, and spare parts availability for long-term maintenance.
Choosing a Taizy Walnut Cracking Machine
Using a walnut cracking machine makes shelling easier and greatly improves processing efficiency and product quality. By following the correct operating steps and adjustment methods, the shelling process becomes smoother and more stable.
Taizy walnut shelling machines are popular both domestically and internationally for their solid structure, low breakage rate, and clean shelling. They are ideal for small and medium-sized processors. You are welcome to contact us through any of the three channels on the right for product inquiries!
