Kershaw Tumbler Folding Pocket Knife User Manual

Product Overview

The Kershaw Tumbler Folding Pocket Knife, model 4038, is a versatile and durable everyday carry (EDC) knife designed by Dmitry Sinkevich. Based on his custom Headly knife, the Tumbler features a high-performance D2 steel blade known for its long-lasting edge and improved corrosion resistance. The handle is constructed from G10 with an integrated top layer of carbon fiber, providing exceptional durability and a secure grip. Key features include a manual open mechanism with KVT ball bearings for smooth deployment, a reliable sub-frame lock for safety, and a reversible deep-carry pocket clip.

Important Safety Information: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Always handle knives with extreme care and keep them out of reach of children.

Initial Setup

Your Kershaw Tumbler knife comes ready for use directly out of the packaging. No assembly is required. Before first use, familiarize yourself with the knife's components and operation.

• Unboxing: Carefully remove the knife from its packaging.
• Initial Inspection: Inspect the blade for sharpness and ensure the handle and locking mechanism are free from any damage or defects.
• Familiarization: Practice opening and closing the knife in a safe environment to understand its manual flipper action and sub-frame lock.

Image: The Kershaw Tumbler knife in its fully open position, showcasing the blade and handle design.

Operation

The Kershaw Tumbler features a smooth manual opening system and a robust sub-frame lock for secure blade deployment and retention.

Opening the Knife (Manual Flipper)

1. Hold the knife firmly in one hand with the blade closed.
2. Place your index finger on the flipper tab protruding from the back of the handle.
3. Apply a quick, deliberate push downwards on the flipper tab. The KVT ball bearings will assist the blade in rotating smoothly into the open and locked position.

Closing the Knife (Sub-Frame Lock)

1. With the blade open, locate the sub-frame lock mechanism on the handle. This is a portion of the handle frame that moves inward to secure the blade.
2. Carefully push the sub-frame lock bar to the side, away from the blade's tang. This disengages the lock.
3. While holding the lock bar, gently fold the blade back into the handle until it is fully closed. Ensure your fingers are clear of the blade path.

Image: The Kershaw Tumbler knife in its closed position, highlighting its compact form and the integrated pocket clip.

Using the Pocket Clip

The Kershaw Tumbler features a reversible deep-carry pocket clip, allowing for tip-up carry on either the right or left side. This provides secure and discreet carrying options.

Image: A detailed view of the deep-carry pocket clip on the Kershaw Tumbler, showing its design and attachment points.

Care and Maintenance

Proper care and maintenance will ensure the longevity and optimal performance of your Kershaw Tumbler knife.

• Cleaning: Clean the blade and handle regularly, especially after use in wet or dirty conditions. Use mild soap and water, then dry thoroughly.
• Oiling: The D2 steel blade will corrode if not cleaned and oiled regularly. Apply a light coat of quality knife oil to the blade and pivot area to prevent rust and ensure smooth action.
• Sharpening: Keep the blade sharp for best performance. Use a sharpening system appropriate for D2 steel. A dull knife can be more dangerous than a sharp one.
• Storage: Store your knife in a dry environment to prevent corrosion.

Troubleshooting

Here are some common issues and their solutions:

• Blade is Dull: The blade requires sharpening. Refer to the "Sharpening" section under Care and Maintenance.
• Blade Action is Stiff: The pivot may need cleaning and lubrication. Apply a small amount of knife oil to the pivot area and work the blade open and closed several times. If the issue persists, the pivot screw might need slight adjustment (do not overtighten).
• Rust or Corrosion on Blade: This can occur if the D2 steel blade is not regularly cleaned and oiled, especially after exposure to moisture. Clean the rust off with a rust eraser or fine abrasive, then apply oil. Ensure regular oiling to prevent recurrence.
• Pocket Clip is Loose: The screws holding the pocket clip may have loosened. Use an appropriate screwdriver to gently tighten them. Do not overtighten.

Specifications

Warranty and Support

The Kershaw Tumbler Folding Pocket Knife is backed by Kershaw's Limited Lifetime Warranty. This warranty covers defects in materials and workmanship for the lifetime of the original owner. For detailed information regarding warranty claims, repairs, or general inquiries, please visit the official Kershaw website or contact their customer support directly.

For further assistance, you may visit the Kershaw Store on Amazon or the official Kershaw Knives website.