The How, Why, and When of Convexing
Convexing is a powerful technique that adds durability and longevity to your knife edge—especially useful for high-impact tasks like hunting, bushcrafting, and field dressing. With the Wicked Edge Convex Edge Kits, you can create, maintain, and polish a convex edge using a guided angle system that delivers unmatched consistency and control.
What Is a Convex Edge?
A convex edge is created by rounding the bevels of your knife, rather than keeping them flat like in a traditional V-grind. This rounded shape strengthens the edge by providing more material behind it, making it highly resistant to chipping and dulling. Convex edges are ideal for:
- Hunting knives
- Survival or bushcraft tools
- Everyday carry (EDC) blades used in rugged environments
Why Use Wicked Edge for Convexing?
Most factory convex edges are created on belt grinders, which often lead to uneven results. With a Wicked Edge precision sharpener, you can achieve a consistent v-grind foundation and then convex that edge using our Convex Edge Kits. This allows for maximum durability while preserving precision and control.
How to Convex Your Knife Edge
Step 1: Start With a V-Grind
Begin by sharpening your knife to a consistent v-grind on your Wicked Edge system. This may require removing an existing factory convex, but doing so ensures an even, consistent bevel along the full edge of the blade. A proper v-grind is essential for getting the best results when you transition to convexing.
Step 2: Set Up Your Convex Kit
- Attach the Convex Handles with Lapping Films placed over the included rubber strips.
- Increase your angle by 1° from your original v-grind. For example, if your v-grind was set at 19°, raise it to 20°.
- Note: Convexing adds about 2° total to your final edge angle. So a 20° v-grind will result in a ~22° convexed edge.
Step 3: Convex With Lapping Films
Begin with the 30-Micron Lapping Film:
- Use an edge trailing stroke (up and away from the edge).
- Apply firm pressure—this is the only time pressure is encouraged while sharpening.
- Do 20 alternating passes down the full length of the edge.
- Clean the blade with rubbing alcohol, then inspect with a loupe, rocking slightly to see the curvature.
Repeat this process until the scratches from the v-grind are removed and the edge looks uniformly smoothed out. Then, switch to the 15-Micron Lapping Film and repeat the process, aiming to remove the finer scratches left behind by the 30-Micron film. This gives you a durable, toothy edge perfect for real-world use.
Tips for Better Convexing
- Keep your Lapping Films clean—grit buildup can slow the process.
- Use honing fluid or Windex directly on the Lapping Film for better results.
- Always inspect your progress regularly to maintain even curvature.
See Convexing in Action
Want a visual walkthrough? Watch our step-by-step instructional videos:
Learn more about our Wicked Edge precision sharpeners and accessories here.
