1. Introduction
The MARTOR SECUBASE 383 is a high-quality safety utility knife designed for efficient and safe cutting of various materials. Its robust construction and advanced safety features, including automatic blade retraction and a multi-position blade lock, make it an ideal tool for professional and general use. This manual provides essential information for the safe and effective operation, maintenance, and care of your SECUBASE 383.

Figure 1.1: The MARTOR SECUBASE 383 Safety Utility Knife, showcasing its ergonomic design and visible blade.
2. Safety Guidelines
Your safety is paramount when using any cutting tool. The SECUBASE 383 is designed with safety in mind, but proper handling is crucial to prevent injuries.
- Always Wear Protective Gear: Use cut-resistant gloves and eye protection when operating the knife.
- Keep Fingers Clear: Ensure fingers and other body parts are clear of the blade's path during cutting and blade changes.
- Automatic Blade Retraction: The SECUBASE 383 features an automatic blade retraction mechanism. The blade will retract into the handle as soon as it loses contact with the cutting material, even if the slider is still engaged. Do not attempt to override this safety feature.
- Secure Grip: Maintain a firm and secure grip on the knife at all times.
- Proper Storage: Store the knife in a safe place, out of reach of children and unauthorized personnel.
- Inspect Before Use: Before each use, inspect the knife for any damage or dullness of the blade. A dull blade can be more dangerous than a sharp one.
3. Product Features
The SECUBASE 383 incorporates several features for enhanced safety and usability:
- Automatic Blade Retraction: The blade automatically retracts into the handle upon losing contact with the cutting surface, significantly reducing the risk of accidental cuts.
- Multi-Position Blade Lock: The blade can be locked in seven different positions, providing flexibility and control for various cutting depths and tasks.
- Ergonomic Design: The handle is designed for comfortable and secure handling, even during prolonged use.
- Durable Construction: Made from high-quality plastic, ensuring longevity and resilience.

Figure 3.1: Close-up view of the internal blade mechanism, highlighting the spring-loaded automatic retraction system.

Figure 3.2: Rear view of the knife, illustrating the blue slider and locking mechanism for multi-position blade extension.
4. Operation
4.1 Blade Extension and Locking
To extend the blade, push the blue slider forward. The blade will extend and can be locked into one of seven positions by releasing the slider at the desired length. To retract the blade, simply release the slider, and the automatic retraction mechanism will pull the blade back into the handle once it loses contact with the material.
4.2 Cutting Techniques
The SECUBASE 383 is suitable for cutting various materials. Always ensure the blade is sharp and apply appropriate pressure.
- General Cutting: Hold the knife firmly and guide the blade along the cutting line. The automatic retraction ensures safety.
- Cutting Cardboard: For opening boxes, insert the blade into the seam and push forward. The blade will retract once the cut is complete.
- Cutting Foam/Insulation: For thicker materials, utilize the multi-position blade lock to maintain a consistent cutting depth.
- Cutting Film/Plastic Sheeting: Use a shallow blade extension for precise cuts without damaging underlying surfaces.

Figure 4.1: Illustration of the correct hand position and motion for initiating a cut with the utility knife.

Figure 4.2: Diagram demonstrating the cutting action on a flat, rectangular material.

Figure 4.3: Diagram illustrating how to safely cut around a cylindrical object.

Figure 4.4: Practical application of the SECUBASE 383 for cutting foam board.

Figure 4.5: Demonstrating the knife's use for cutting plastic sheeting.

Figure 4.6: The SECUBASE 383 being used to safely open a cardboard box.
5. Blade Replacement
Regular blade replacement ensures optimal cutting performance and safety. A dull blade requires more force, increasing the risk of slippage and injury. Specific instructions for blade replacement are typically provided with the replacement blades or can be found on the manufacturer's website. Always follow the manufacturer's guidelines for safe blade changes.
- Ensure the blade is fully retracted before attempting replacement.
- Use appropriate tools if required for opening the knife housing.
- Dispose of old blades safely in a designated blade disposal container.
- Only use genuine MARTOR replacement blades for optimal performance and safety.

Figure 5.1: Detailed view of the blade, showing its sharp edge and serrated section, indicating the need for proper handling and replacement.

Figure 5.2: Illustration of different blade types compatible with utility knives, emphasizing the importance of using the correct blade for the SECUBASE 383.
6. Care and Maintenance
Proper care and maintenance will extend the life of your SECUBASE 383 and ensure its continued safe operation.
- Cleaning: After use, wipe down the knife with a dry cloth to remove any debris or residue. For stubborn dirt, a slightly damp cloth can be used, ensuring the knife is thoroughly dried afterward.
- Avoid Harsh Chemicals: Do not use abrasive cleaners or solvents, as these can damage the plastic housing.
- Lubrication: The internal mechanism is designed for smooth operation. Avoid applying lubricants unless specifically instructed by the manufacturer, as this can attract dust and impair the automatic retraction.
- Storage: Store the knife in a clean, dry environment to prevent corrosion of the blade and internal components.
7. Troubleshooting
If you encounter issues with your SECUBASE 383, consider the following:
- Blade Not Extending/Retracting Smoothly:
- Check for debris or obstructions in the blade channel. Clean as per maintenance instructions.
- Ensure the blade is correctly installed.
- The blade might be dull or damaged; replace it if necessary.
- Difficulty Cutting:
- The blade is likely dull. Replace it with a new, sharp blade.
- Ensure you are using the correct blade extension for the material being cut.
- Knife Housing Damaged:
- If the housing is cracked or broken, discontinue use immediately to prevent injury. Contact customer support for repair or replacement options.
8. Specifications
| Attribute | Detail |
|---|---|
| Brand | MARTOR |
| Model Number | 383005.02 |
| Dimensions (L x W x H) | 17.05 x 2.5 x 3.4 cm |
| Weight | 78.5 grams |
| Material | Plastic |
| Blade Style | Automatic Retraction |
9. Warranty and Support
MARTOR stands behind the quality of its products. The SECUBASE 383 comes with a minimum 2-year warranty from the date of purchase, covering defects in materials and workmanship.
For warranty claims, technical support, or inquiries regarding spare parts and accessories, please refer to the contact information provided on the official MARTOR website or your point of purchase. Always provide your model number (383005.02) and proof of purchase when contacting support.





