Do Dog Clippers Get Dull. How long should dogs nails be? A worn drive lever can produce 'tram lines', snagging and the appearance of a dull blade.

A worn drive lever can produce 'tram lines', snagging and the appearance of a dull blade. If you find that the back and front rails have rounded off and are as smooth as the sole plate itself then it is time to replace the clipper blade. An old, worn drive lever may result in “tram lines” and an overlypronounced blade, making it seem dull.