A Reel Grinder is a specialized precision machine used exclusively for sharpening the cylindrical reel of a reel mower. It is essential for maintaining the scissor-action cutting system that defines reel mower performance. The machine securely holds the reel and rotates it against a wide, horizontal grinding wheel.

This process simultaneously grinds each helical blade on the reel to a perfect cylindrical form and a sharp, uniform cutting edge. The ultimate goal is to achieve a flawless, light-tight contact between the entire length of the reel blades and the stationary bedknife. Properly sharpening the reel with this grinder is a fundamental maintenance task for preventing ragged grass tips and ensuring a clean, healthy cut.