Corner Rounder Blades and Dies

You can change the corner radius only when the machine is designed for interchangeable knives or dies. Some machines support several radius options, while others require a specific die set or separate lower die to match the upper cutting knife. For example, Akiles Diamond 1 replacement radius knives are offered in 1/8 inch, 1/4 inch, and 3/8 inch options, so the chosen radius changes the finished corner shape. A smaller radius works well on business cards and badges, while a larger radius gives covers and menus a softer edge. Buyers using Akiles equipment should compare the machine family under Akiles corner cutters before mixing parts.

Replace the blade when corners look torn, fuzzy, or incomplete even after proper paper alignment. Replace the cutting pad when the blade is sharp but the material still shifts, indents unevenly, or cuts better in one area than another. Some corner rounders rely on both parts working together, so a new knife may not solve the issue if the pad is heavily grooved. For higher-volume setups, keeping spare pads on hand helps prevent downtime because pads wear faster than metal knives. If your machine is from the Lassco Wizer line, review compatible Lassco Wizer corner rounders and match the replacement to the exact model.

Use the radius that matches both the material and the look you want. A 1/8 inch radius gives a subtle rounded corner, which is often best for business cards, small tags, and pieces where the design has tight margins. A 1/4 inch radius is a common middle choice for general documents, laminated badges, presentation covers, and printed handouts. A 3/8 inch or larger radius creates a more visible rounded corner and may suit covers, menus, and display pieces. The material stack also matters. Thicker stacks need a machine and die rated for that lift, not just the right radius. Always confirm the machine’s supported die sizes before ordering a replacement.

Different dies create different finishing cuts, so they are not interchangeable parts. A radius die rounds the outside corner. A straight-cut knife creates a straight trim. A half-moon die creates a thumb notch, often used when users need to grip or remove inserts more easily. Some machines can accept more than one cut style, but each style may require its own knife, die, depth guide, or matching accessory. Buying by shape alone can lead to fit problems, especially when the same brand has several machine families. Before ordering, identify whether the job needs a rounded corner, a notch, or a straight edge, then match that shape to the exact supported machine.