Jointer & Planer Knives and Accessories

Jointer & Planer Knives, Jigs, and Accessories for Cleaner Cuts

A sharp, properly set knife is the foundation of clean, tearout-free surfacing. Infinity Tools carries replacement high-speed steel planer and jointer knives as well as carbide-tipped planer and jointer knives to match your machine and material demands. HSS knives sharpen easily and suit softwoods and general hardwood use; carbide-tipped knives hold an edge longer in abrasive woods and sheet goods.

Correct knife height is just as important as sharpness. Our planer knife setting jig and jointer knife jig take the guesswork out of installation, ensuring every knife is set to the same height for a level, consistent cut. A misset knife causes snipe, chatter, or premature dulling — the right jig eliminates all three.

Maximize thickness accuracy with digital readouts from Wixey and iGaging. The Wixey digital planer readout mounts directly to portable planers and displays real-time thickness so you can dial in the exact dimension without test cuts. Our Little Wizard II metal detector protects your knives from hidden fasteners in reclaimed lumber before they ever reach the cutterhead.

Complete Your Power Tool Accessories

Browse the full power tool accessories collection or explore related categories like sawing tools and blades, bandsaw accessories, and miter saw accessories to outfit your entire shop.

Frequently Asked Questions

What is the difference between HSS and carbide-tipped jointer and planer knives?

High-speed steel (HSS) knives are easier to resharpen and work well for most hardwoods and softwoods. Carbide-tipped knives hold an edge significantly longer, making them the better choice for abrasive materials like MDF, plywood, or reclaimed lumber with mineral deposits.

How do I know which replacement planer knives fit my machine?

Replacement knives must match your machine's cutterhead in length, width, and thickness. Check your planer's manual for the knife dimensions, then compare to the product specifications listed for each knife set — for example, Infinity offers dedicated replacement knives for the DeWalt DW735 and other popular models.

Why do I need a knife-setting jig for my planer or jointer?

Even a small difference in height between knives causes uneven cutting, chatter, and snipe. A knife-setting jig registers each knife to the same precise height relative to the cutterhead, ensuring a smooth, level cut from the first pass. It also speeds up knife changes considerably.

Can I sharpen carbide-tipped planer knives, or do I need to replace them?

Carbide-tipped planer knives can be honed with a diamond stone to extend their service life between replacements. The diamond knife hone is designed specifically for both HSS and carbide jointer and planer knives and restores the cutting edge without removing excess material.

What does a digital planer readout do, and is it worth it?

A digital readout mounts to your portable planer and displays the actual cutting depth in real time, so you can plane stock to an exact thickness without repeated measuring and test cuts. It is particularly valuable when milling multiple boards to a consistent dimension for glue-ups or panels.

How does a woodworking metal detector protect my planer knives?

Hidden staples, nails, or screws in reclaimed or pallet lumber can chip or shatter planer and jointer knives in an instant. Running stock through the Little Wizard II metal detector before milling identifies any embedded metal so you can remove it before it contacts the cutterhead.

How often should I replace my planer or jointer knives?

Replacement frequency depends on the hardness and abrasiveness of the wood you process and the total volume of material milled. Signs that knives need attention include fuzzy grain, visible mill marks, increased resistance, or burning on the wood surface. Regular light honing extends knife life significantly.

Is a jointer necessary if I already have a planer?

A planer flattens stock to a consistent thickness but references off one face — if that face is cupped or bowed, the planer will replicate the warp. A jointer creates a single flat reference face first, which the planer then mirrors on the opposite side. Both machines are used together for truly flat, parallel boards.

What safety precautions should I follow when changing jointer or planer knives?

Always disconnect the machine from power before removing or installing knives. Handle knives with a folded cloth or leather gloves — never bare hands. Lower the cutterhead guard back into place before reconnecting power, and confirm all knife-locking bolts are torqued to spec. Visit the Infinity Tools learning center for technique guides.

Does Infinity Tools ship jointer and planer knives quickly?

Yes — most jointer and planer knives and accessories are stocked and ship promptly. See the shipping policy page for current lead times and carrier options.

Jointing & Planing