Product Description
CMT 794.302 High-Speed Steel Planer and Jointer Knives - 12" Length, 3-Piece Set delivers professional-grade surface planing and jointing performance for woodworkers and shop operators who demand a clean, consistent finish. Ground from fine European high-speed steel with a 13% tungsten (13%W) composition, these HSS knives are engineered to maintain a sharp cutting edge through demanding planing sessions on both softwood and hardwood stock. Whether you are surfacing rough lumber on a stationary planer or truing an edge on a jointer, this 3-piece knife set provides the cutting quality needed for smooth, flat results.
Key Features
- 13% Tungsten High-Speed Steel (HS 13%W) construction - the elevated tungsten content increases hardness and heat resistance, allowing the cutting edge to stay sharper longer during extended planing runs on both dry softwood and dry or wet hardwood.
- Precision-ground from fine European high-speed steel - careful, consistent grinding produces a uniform cutting edge across all three knives, which means predictable, repeatable depth of cut and a high-quality surface finish with minimal tearout.
- Compatible with dry softwood, dry hardwood, and wet hardwood - broad material compatibility reduces the need to swap knife sets between species, saving time and setup effort in a busy shop environment.
- Set of 3 matched knives - having three knives allows you to replace a full head set at once, maintaining balanced cutter-head performance and avoiding vibration caused by mismatched wear levels.
- 12" x 3/4" x 1/8" knife dimensions - these specific dimensions are sized to fit planer and jointer machines requiring this standard knife profile, making them a direct-fit replacement for compatible heads.
Why This Product
- Woodworkers who plane both softwood and hardwood in the same session can rely on the 13%W high-speed steel to hold its edge across material types without frequent regrinding or replacement.
- Shops seeking a high-quality surface finish will benefit from the fine European steel and careful grinding process, which together reduce chatter marks and produce smooth, ready-to-finish surfaces directly off the machine.
- Replacing all three planer or jointer knives at once with this matched set keeps the cutter head balanced, which reduces vibration, extends machine bearing life, and improves cut quality compared to replacing only one or two worn knives.
- The 12" knife length covers a common planer and jointer width, making these a practical replacement option for woodworking shops running machines with this knife profile.
Specifications
- Manufacturer Part Number: 794.302
- Brand: CMT Orange Tools
- Diameter: 12"
- Cutting Height: 3/4"
- Total Length: 1/8"
- Material: HS 13%W
- Quantity: 3 pieces
Approved Applications
- Planing dry softwood
- Planing dry hardwood
- Planing wet hardwood
- Jointing lumber on stationary jointer machines
- Surface preparation for finish woodworking
What's Included
- 3x high-speed steel planer and jointer knives (12" x 3/4" x 1/8")
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 (HS 13%W) composition. The 13% tungsten content increases the steel's hardness and heat resistance, which helps the cutting edge retain its sharpness through prolonged planing and jointing work on both softwood and hardwood.
Can these knives be used on wet hardwood as well as dry lumber?
Yes. The CMT 794.302 knives are suitable for cutting dry softwood, dry hardwood, and wet hardwood, making them a versatile choice for shops that work with green or freshly milled lumber as well as kiln-dried stock.
Why should I replace all three knives at the same time?
Replacing all three knives simultaneously keeps the cutter head balanced. When knives wear unevenly or only some are replaced, the resulting imbalance can cause vibration, uneven cutting depth, and accelerated wear on machine components. Using a matched set of three ensures consistent performance across the full width of the cut.
What kind of finish quality can I expect from these HSS planer knives?
According to CMT, these knives are carefully ground from fine European high-speed steel and are designed to produce a high-quality finish. The precision grinding process creates a uniform cutting edge that minimizes surface irregularities, making the planed or jointed face suitable for downstream finishing operations.
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