Product Description
CMT Solid Carbide Reversible Insert Knives - 4 Cutting Edges, 35 deg. Bevel, 20x4.1x1.1mm - 10-Pack by CMT are precision-ground throwaway indexable knives engineered for professional woodworking applications. Built from K1920-grade solid carbide (tungsten carbide), these reversible insert knives deliver long-lasting cutting performance on hardwood, softwood, MDF, chipboard, and plywood. Each knife features 4 usable cutting edges at a 35 deg. angle, letting you rotate to a fresh edge rather than stopping to sharpen - keeping your spindle moulder, profile machine, or router table running at full productivity. The 10-piece pack ensures you always have fresh inserts on hand for profiling, molding, rabbeting, grooving, jointing, and edge work.
Key Features
- K1920 Solid Carbide Construction - tungsten carbide material delivers significantly longer cutting life compared to HSS alternatives, especially in abrasive materials like MDF and chipboard where edges dull faster.
- 4 Reversible Cutting Edges at 35 deg. Bevel - each knife provides 4 usable edges, meaning you get four times the value per insert before disposal, reducing downtime and tooling cost per linear foot of cut.
- Throwaway Indexable Design - no resharpening required; rotate to a fresh 35 deg. cutting edge in seconds, keeping your cutter head producing consistent, accurate profiles throughout the workday.
- Precision-Ground Knife Dimensions (20x4.1x1.1mm) - exact tolerances on thickness (1.1mm), cutting depth (5.5mm), and total length (30mm) ensure repeatable profile accuracy and proper seating in compatible cutter head systems.
- Standard Reversible Knife Format - compatible with CMT insert shaper systems and other indexable cutter heads that accept the 20x4.1x1.1mm knife specification, offering broad compatibility across professional woodworking machinery.
- 10-Piece Pack - stocking multiple inserts means less interruption during production runs and more flexibility when switching between edges or profiles on the same machine.
Why This Product
- Four cutting edges per knife means you replace tooling far less often - ideal for shops running high volumes of profiling or molding work where downtime for sharpening is not practical.
- The 35 deg. bevel angle and K1920 carbide grade are specifically suited to demanding materials like MDF and chipboard, where softer tooling materials wear rapidly and produce poor surface quality.
- The throwaway indexable format eliminates the cost and delay of sending knives out for grinding, making these inserts a strong productivity choice for production woodworking environments.
- The 10-piece pack provides enough inventory to keep multiple cutter heads loaded and ready, reducing machine idle time and supporting continuous workflow on spindle moulders and profile machines.
Specifications
- Manufacturer Part Number: 790.300.01
- Brand: CMT Orange Tools
- Total Length: 30mm
- Cutting Depth: 5.5mm
- Teeth Thickness: 1.1mm
- Angle: 35 deg.
- Number of Cutting Edges: 4
- Material: K1920 Solid Carbide
- Quantity: 10-Piece Pack
Approved Applications
- Profiling and Molding
- Edge Profiling
- Rabbeting
- Grooving
- Jointing
Frequently Asked Questions
How many usable cutting edges does each knife provide?
Each CMT 790.300.01 solid carbide knife features 4 reversible cutting edges at a 35 deg. bevel angle. When one edge dulls, simply rotate the insert to expose a fresh edge - no resharpening needed. The throwaway design means you discard the insert after all 4 edges have been used.
What are the exact knife dimensions I should verify before ordering?
The knives measure 30mm total length x 5.5mm cutting depth x 1.1mm teeth thickness. These dimensions - sometimes referenced as the 20x4.1x1.1mm insert knife format - must match the pocket specifications of your cutter head to ensure proper seating and safe operation.
What materials can these solid carbide insert knives cut?
The K1920-grade solid carbide construction is well suited for cutting hardwood, softwood, MDF, chipboard, and plywood. Carbide tooling is particularly advantageous in abrasive sheet materials like MDF and chipboard, where it maintains a sharp edge far longer than high-speed steel alternatives.
What does the 10-piece pack quantity mean for my tooling inventory?
Each order contains 10 individual solid carbide reversible knives. With 4 cutting edges per knife, a single 10-piece pack provides up to 40 total cutting edges before you need to reorder, making it a practical stocking quantity for production woodworking operations.
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