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Adjusting Your Prawnto

Your Prawnto offers several adjustments for different shrimp sizes and cutting styles. Each adjustment serves a different purpose. Start with a test shrimp, examine the result, and make small changes as needed.

Important — Safety First: Turn OFF and unplug your Prawnto before inspecting, removing shrimp, or making mechanical adjustments. Reinstall both the Round Guard and Square Guard before operation.

1. Feeder Disc Spacing — Match Your Shrimp Size

The Feeder Discs #313 guide the shrimp through the cutting blade. Adjust spacing to match the actual shrimp size. Standard Spacer #434S measures 1/4 inch; Small Spacer Washer #434 measures 1/16 inch. Adding or removing these spacers adjusts the distance between Feeder Discs.



Your Prawnto normally arrives adjusted for shrimp grades 21/25 and 26/30, but those settings are only general starting points. Never force shrimp between discs that are too closely spaced.

2. Blade Centering — Keep Your Cut On Target

The blade should be centered between the Feeder Discs. Inspect the blade from ABOVE the machine and from the ON/OFF-switch side. Proper centering helps produce consistent cuts and improve vein removal. Follow the Alignment & Maintenance training video for detailed adjustments.

3. Depth Of Cut — Choose Your Cutting Style

The cutting depth can be adjusted for Scored Shell, Easy Peel, Round, Butterfly, or Western cuts. The serrated tip of the blade must reach below the vein for effective vein removal. Cold, firm shrimp produce more consistent results.

4. Length Of Cut — Roller Disc Assembly #314

Roller Disc Assembly #314 controls how far the cut extends along the shrimp. Adjusting its spacing changes the length of cut independently of blade cutting depth.


IMPORTANT: The vein is removed only where the blade actually cuts. If the cut stops before the last joint, the vein in that last joint will remain.


The assembly uses six spacers, Part #415. Always retain all six spacers, keep the discs centered relative to the Feeder Discs, and ensure the tightened assembly turns freely on its shaft. Refer to the Step-by-Step guide and official training instructions for detailed procedures.

5. Recommended Adjustment Order

  1. Set Feeder Disc spacing for the shrimp size.
  2. Center the cutting blade.
  3. Adjust cutting depth.
  4. Adjust Roller Disc spacing for desired length of cut.
  5. Reinstall both safety guards; process one or two shrimp, inspect the cut and vein removal, and repeat as necessary.

6. Additional Help & Resources

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