CMT 690.021 Profile Knives for Insert Shaper System are precision-crafted, paired shaper knives sized 1-37/64 in. x 5/32 in. (40x4mm) and designed for use with CMT universal cutter heads in the insert shaper system. Made from alloyed steel (SP grade material), these knives deliver long-lasting performance in molding, profiling, and edge-shaping operations on a wide range of wood-based materials. Sold as a pair of 2 knives, they are a direct-fit solution for woodworkers and cabinetmakers who demand consistent, repeatable profile results from their spindle moulders and insert-style cutter head systems.

Key Features

• Paired knife set (2 knives per pack): supplied as a matched pair so both knives are replaced together, ensuring balanced cutting and uniform profile output with every pass.
• 1-37/64 in. cutting height: provides sufficient profile depth for a wide variety of molding, edging, and door-making profiles without multiple repositioning steps.
• 5/32 in. (4mm) knife thickness: fits the standard 40x4mm slot geometry of CMT and compatible universal insert cutter heads, making changeover quick and secure.
• Made of alloyed steel (SP material): the alloyed steel construction resists wear and maintains a sharp cutting edge longer than standard steel, reducing the frequency of knife changes during production runs.
• Designed for universal cutter heads: compatible with the full range of CMT insert shaper cutter heads and other universal systems accepting 40x4mm knives, giving woodshops flexible tooling options across multiple machines.
• Long-lasting performance: engineered for extended service life in demanding production and workshop environments, lowering per-piece tooling costs over time.
• Profile number 021 configuration: a specific molding profile ground into each knife pair, delivering consistent, repeatable results run after run for matched architectural millwork and cabinet components.

Why This Product

• Woodworkers who need a dedicated profile for molding, frame-and-panel, or cabinet door work can rely on the 021 profile geometry to produce consistent results every time, without custom grinding or setup guesswork.
• The 40x4mm (1-37/64 in. x 5/32 in.) knife size fits the CMT universal insert cutter head system, meaning shops already invested in compatible cutter heads can expand their profile library simply by swapping knives - no new tooling bodies required.
• Alloyed steel construction extends service intervals compared to standard steel knives, making these an efficient choice for production environments where downtime for knife changes cuts into throughput.
• Selling as a matched pair of 2 ensures both cutting edges are replaced simultaneously, supporting balanced cutting forces that protect the cutter head body and produce smoother finished surfaces on hardwood, softwood, MDF, and chipboard.

Specifications

• Manufacturer Part Number: 690.021
• Brand: CMT Orange Tools
• Cutting Height: 1-37/64 in.
• Maximum Thickness: 5/32 in.
• Knife Size: 40x4mm
• Material: SP (alloyed steel)
• Quantity: 2 knives (sold as a pair)
• System Compatibility: CMT Insert Shaper System - universal cutter heads
• Profile Number: 021

Approved Applications

• Molding and profiling on hardwood and softwood
• Cabinet door making and frame-and-panel work
• Edge profiling on MDF and chipboard
• Architectural millwork and decorative molding production
• Use with spindle moulders, moulders, and profile and edging machines