A perfectly tapered edge is necessary to make the cleanest cut with the least amount of force. A very low angle must be used. Low-angle blades are sharper than a blade of a higher angle, but dull more quickly. This is a tradeoff. Therefore, maintenance is required more often on a low-angled blade.
The blade should be touched-up lightly after every horse, lightly and often is the key to maintaining an edge. Do not proceed to trim the hoof with a knife unless it has been wire-brushed. First, it saves the edge of the knife by removing dirt and grit. Second, it better prepares the hoof. You’ll find yourself actually trimming less. Grit and dirt can dull a blade in no-time minimizing its efficiency.