Product Description
CMT 3-Piece High-Speed Steel Planer and Jointer Knives - 6-1/8" Length by CMT are precision-ground replacement blades engineered for stationary planers and jointers. Carefully ground from fine European high-speed steel with a 13% tungsten composition, these knives deliver a high-quality surface finish on dry softwood, dry hardwood, and wet hardwood alike. Whether you are resurfacing rough lumber, flattening boards on a jointer, or preparing stock for finish work, this set of 3 knives provides the consistent cutting performance that demanding woodworking applications require.
Key Features
- 13% Tungsten High-Speed Steel (HS 13%W) construction - the elevated tungsten content increases hardness and heat resistance, extending edge life and reducing how often knives need to be replaced or resharpened.
- Carefully ground from fine European high-speed steel - precision grinding ensures a uniform cutting edge across the full 6-1/8 in. length, producing a smooth, flat surface on every pass.
- Suitable for dry softwood, dry hardwood, and wet hardwood - broad material compatibility means one set of knives handles a wide range of lumber species and moisture conditions without needing a specialty blade.
- Set of 3 knives included - matches the typical 3-knife cutter head configuration on most stationary planers and jointers, so you can do a complete knife change in a single purchase.
- High-quality finish output - the combination of precise grinding and quality steel means workpieces come off the machine with a fine surface that requires minimal additional sanding or hand-planing.
Why This Product
- Woodworkers who process both green and kiln-dried lumber benefit from a single knife set rated for dry softwood, dry hardwood, and wet hardwood, eliminating the need to stock multiple blade types for different stock conditions.
- The 13% tungsten high-speed steel formula holds an edge longer than standard HSS, which means fewer interruptions to production and lower long-term cost per board-foot of material processed.
- At 6-1/8 in. long and 5/8 in. cutting height, these knives are sized as a direct match for planer and jointer cutter heads that use this common knife dimension, making changeover straightforward.
- Because each knife is carefully ground from fine European high-speed steel, the cutting geometry is consistent from knife to knife in the set, which is essential for balanced cutter head rotation and chatter-free surface results.
Specifications
- Manufacturer Part Number: 794.161
- Brand: CMT Orange Tools
- Length: 6-1/8 in.
- Cutting Height: 5/8 in.
- Thickness: 3/32 in.
- Material: HS 13%W (13% Tungsten High-Speed Steel)
- Quantity: 3 pieces
Approved Applications
- Planing
- Jointing
- Surface preparation
- Processing dry softwood
- Processing dry hardwood
- Processing wet hardwood
What's Included
- 3x High-speed steel planer and jointer knives (6-1/8 in. length)
Frequently Asked Questions
What machines are these knives designed for?
These knives are designed for stationary planer and jointer machines that use a 6-1/8 in. long, 5/8 in. high, 3/32 in. thick knife configuration.
Can these knives be used on wet or green lumber?
Yes. The product data explicitly states these knives are suitable for cutting dry softwood, dry hardwood, and wet hardwood, making them versatile for lumber at various moisture levels.
Why does the tungsten percentage in the steel matter?
The 13% tungsten content in the high-speed steel formula increases the hardness and heat resistance of the cutting edge. This allows the knives to maintain sharpness longer under the friction and heat generated during planing and jointing operations.
Why does the set include 3 knives?
Most stationary planer and jointer cutter heads use 3 knives spaced around the drum. A 3-piece set allows you to replace all knives at the same time, which is essential for maintaining balanced rotation and consistent surface quality across the full width of the cut.
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