Chipper Knife, 9 x 5.5 x 5/8 in

This chipper knife measures 9 x 5.5 x 5/8 in and is a replacement blade for brush chippers that use that size. Sharp knives feed brush faster, use less fuel and put less strain on the machine.

Why sharp knives matter

Dull chipper knives beat brush instead of cutting it. The machine slows, feeds poorly, burns more fuel and passes more vibration to the bearings. Crews that keep a sharp set ready and swap knives on schedule spend less time feeding by hand. Match length, width, thickness and the bolt hole pattern to your chipper's manual before ordering.

Many crews rotate two sets: one in the machine, one at the sharpening shop.

Keeping the knives sharp also makes the chipper quieter and smoother to feed, and it cuts down on the strings of bark and fiber that wrap around the feed rollers. A sharp set produces cleaner chips that are easier to sell or spread as mulch. Write down the date of each knife change so you can plan swaps around hours of use rather than waiting until the machine starts struggling.

Changing knives safely

Shut the chipper down, remove the key, and lock the disc or drum per the maker's instructions before reaching in. Wear cut-resistant gloves, torque bolts to spec, and check the anvil gap after a knife change. Only trained crew members should service or run a chipper.

Store spare knives oiled and wrapped so the edges stay sharp and free of rust.

More chipper parts are in our chipper knives section.