Product Description
CMT 794.321 3-Piece High-Speed Steel Planer and Jointer Knives deliver precision surface preparation for woodworkers who demand consistent, high-quality results from their stationary planers and jointing machines. Carefully ground from fine European high-speed steel with a 13% tungsten (13%W) composition, these replacement knives are engineered to handle dry softwood, dry hardwood, and even wet hardwood - making them a versatile choice for a wide range of milling and surfacing tasks. Each set includes 3 knives measuring 12-1/2 inches in length, 11/16 inch in cutting height, and 1/8 inch in thickness, providing a direct-fit replacement that restores smooth, flat cutting performance to your planer or jointer.
Key Features
- 13% Tungsten High-Speed Steel (HSS) construction - the elevated tungsten content increases hardness and heat resistance, meaning the cutting edge stays sharper longer and holds up through demanding hardwood milling sessions without premature dulling.
- Precision-ground from fine European high-speed steel - each knife is carefully ground to exacting tolerances, producing a consistent cutting edge that delivers a smooth, flat finish on every pass and minimizes sanding and finishing time afterward.
- Compatible with dry softwood, dry hardwood, and wet hardwood - the broad material compatibility means a single set of knives handles most wood species and moisture conditions commonly found in cabinet shops, millwork operations, and general woodworking.
- Set of 3 knives per pack - matches the standard knife count for most stationary planers and jointers, so a single purchase gives you everything needed to complete a full knife change and restore your machine to peak performance.
- Designed for stationary planers and jointers - dimensioned as a direct replacement for machines that accept 12-1/2 in. x 11/16 in. x 1/8 in. knives, reducing downtime and the guesswork of finding a compatible aftermarket blade set.
Why This Product
- High-quality finish on every pass - the precision-ground European HSS construction means these knives produce a smooth, clean surface on both softwoods and hardwoods, reducing the need for follow-up hand planing or sanding.
- Handles wet and dry stock - unlike lower-grade planer knife sets that struggle with wet hardwood, the 13%W high-speed steel composition maintains cutting performance across varying moisture conditions, so you are not changing knives mid-project when moisture content varies.
- Complete set in a single purchase - the 3-piece set replaces all knives in a standard planer or jointer head at once, ensuring uniform cutting performance across the full width of the board rather than mixing new and worn blades.
- Engineered for long cutting life - the 13% tungsten alloy formula is specifically chosen for planer and jointing applications where repeated impact and abrasion would quickly degrade standard tool steel, helping extend the service interval between knife changes.
Specifications
- Manufacturer Part Number: 794.321
- Brand: CMT Orange Tools
- Length: 12-1/2 in.
- Cutting Height: 11/16 in.
- Thickness: 1/8 in.
- Material: HS 13%W (13% Tungsten High-Speed Steel)
- Quantity: 3 pieces
Approved Applications
- Planing dry softwood
- Planing dry hardwood
- Planing wet hardwood
- Jointing and surface preparation on stationary jointers
- Thickness planing on stationary planer machines
What's Included
- 3x High-speed steel planer and jointer knives (12-1/2 in. x 11/16 in. x 1/8 in.)
Frequently Asked Questions
What type of steel are these planer knives made from?
These knives are made from high-speed steel with a 13% tungsten (13%W) composition. This specific alloy is carefully ground from fine European high-speed steel, providing elevated hardness and heat resistance suited to demanding planer and jointer applications.
Can these knives be used on both softwood and hardwood?
Yes. The CMT 794.321 knives are suitable for cutting dry softwood, dry hardwood, and wet hardwood, making them appropriate for a wide range of lumber species and moisture conditions encountered in woodworking and millwork.
How many knives come in this set, and will that be enough to replace a full knife head?
Each set contains 3 knives. Most standard stationary planers and jointers that accept 12-1/2 in. knives use a 3-knife cutterhead, so this set provides a complete replacement for all blades in a single purchase.
What are the exact dimensions of each knife in this set?
Each knife measures 12-1/2 inches in length, 11/16 inch in cutting height, and 1/8 inch in thickness. Verify these dimensions against your planer or jointer's knife specifications before installing to confirm compatibility.
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