Product Description
CMT Pair of Knives for Roundover and Chamfer (Bottom) - R=4mm plus 45 deg. by CMT are precision-ground, solid carbide profiling knives designed for shaping clean roundover and chamfer profiles on the bottom edge of workpieces. Engineered from HW-grade carbide material, these replacement knives are built for use in spindle moulder and shaper cutter head systems, delivering consistent, repeatable edge profiles across a wide range of woodworking applications. Whether you are profiling hardwood furniture components, shaping MDF mouldings, or chamfering plywood panels, this matched pair provides the cutting geometry to achieve accurate results pass after pass.
Key Features
- HW carbide material - hard-wearing tungsten carbide construction maintains a sharp cutting edge through demanding production runs, reducing the frequency of replacements and downtime.
- Combined R=4mm roundover plus 45 deg. chamfer profile (bottom) - a single pair of knives produces two distinct profile elements simultaneously, making it efficient to machine decorative and functional bottom-edge details in one pass.
- 20mm diameter and 20mm cutting height - the cutting geometry is sized to suit compatible CMT cutter head bodies, ensuring proper fit and full profile engagement with the workpiece.
- Precision-ground profile - ground to exact profile specifications so every knife in the pair matches, giving you symmetrical, accurate edge shapes and minimizing sanding or hand-finishing time.
- Sold as a matched pair - both knives are included together, maintaining balanced cutter head performance and even material removal for a smooth, chatter-free cut.
Why This Product
- The combined roundover and 45 deg. chamfer geometry on a single pair of knives means you can produce a finished bottom-edge profile without swapping tooling mid-job, saving setup time on the spindle moulder or shaper.
- HW carbide construction makes these knives well suited for high-wear materials like MDF, chipboard, and hardwood - materials that quickly dull less robust tooling - helping you maintain clean cuts across full production runs.
- The 4mm radius is a commonly specified decorative profile for furniture, cabinetry, and architectural moulding work, making this pair a practical addition to a woodworking shop's replacement knife inventory.
- Buying a matched pair ensures the cutter head remains properly balanced, which contributes to surface quality and reduces vibration during the cut - a direct benefit when working with finish-grade material.
Specifications
- Manufacturer Part Number: 695.005.B4
- Brand: CMT Orange Tools
- Diameter: 20mm
- Cutting Height: 20mm
- Total Length: 2mm
- Radius: 4mm / 45 deg.
- Profile: Roundover / Chamfer (Bottom)
- Material: HW (Carbide)
- Quantity: 2 pieces (1 pair)
Approved Applications
- Bottom-edge roundover profiling on hardwood, softwood, plywood, MDF, and chipboard
- 45 deg. chamfer shaping on the bottom edge of workpieces
- Decorative moulding and edge shaping on furniture and cabinetry components
- Production profiling on spindle moulders, shapers, profiling machines, and edging machines
What's Included
- 2x profiled HW carbide knives (matched pair) - R=4mm roundover plus 45 deg. chamfer, bottom profile
Frequently Asked Questions
What profile does this pair of knives produce?
These knives are ground to produce a combined R=4mm roundover plus a 45 deg. chamfer on the bottom edge of the workpiece. The two profile elements are incorporated into a single knife geometry, so both features are formed in one pass through the cutter head.
What machines are compatible with these knives?
These knives are designed for use in compatible CMT cutter head bodies mounted on spindle moulders, shapers, profiling machines, and edging machines. Always confirm that your cutter head accepts knives with a 20mm diameter and 20mm cutting height before installation.
What materials can be shaped with these carbide knives?
The HW carbide construction makes these knives suitable for profiling hardwood, softwood, plywood, MDF, and chipboard. Carbide tooling is particularly well suited to abrasive composite materials like MDF and chipboard that would wear high-speed steel tooling more rapidly.
Why is it important that knives are sold as a matched pair?
When knives are installed in a cutter head as a matched pair, the cutting load is distributed evenly around the head, keeping it balanced. An unbalanced cutter head can cause vibration during the cut, which negatively affects surface quality and can accelerate wear on the machine spindle. Using a matched pair from the same production batch helps ensure consistent profile geometry across both cutting edges.
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