CMT 690.057 Profile Knives for Insert Shaper System by CMT are a pair of alloyed steel shaper knives sized 1-37/64 in. x 5/32 in. (40x4mm), engineered for use with CMT universal cutter heads. Designed for woodworkers and cabinet makers who demand consistent molding profiles and long-lasting cutting performance, these insert shaper knives deliver precise, repeatable results across hardwood, softwood, MDF, and chipboard. Whether you are profiling cabinet doors, shaping frames, or running decorative molding on a spindle moulder, the 690.057 knife pair integrates seamlessly into the CMT insert shaper system for professional-grade output.

Key Features

• Alloyed steel construction - provides durability and resistance to wear during extended production runs, reducing downtime and replacement frequency on demanding shaping operations.
• 1-37/64 in. cutting height with 5/32 in. maximum thickness (40x4mm) - precise knife geometry ensures accurate profile depth and consistent surface finish from the first pass to the last.
• Pair of 2 knives (KSS 40x4mm format) - sold as a matched pair so both knives wear evenly and maintain balanced cutter head operation, which is critical for vibration-free performance.
• Compatible with universal cutter heads - fits CMT 692 series cutter heads and other insert shaper systems accepting 40x4mm or 50mm profile knives, giving you flexibility across multiple machines.
• Part of a broad profile knife range - the 690 series offers a wide variety of profile numbers, meaning you can build a library of interchangeable knives for diverse molding and edging applications without investing in new cutter heads.
• Long-lasting performance - engineered for repeated use across production environments, reducing cost-per-cut over time compared to disposable tooling alternatives.

Why This Product

• If you already own a CMT 692 series cutter head or a compatible universal insert shaper, the 690.057 knives let you expand your profile capabilities without purchasing a new cutter body - one head, many profiles.
• The alloyed steel material maintains edge integrity through demanding cuts in hardwood, softwood, MDF, and chipboard, making these knives a practical choice for cabinet shops and millwork operations that process a range of materials daily.
• At 40x4mm, the knife dimensions match the industry-standard insert shaper format, so these knives are not limited to a single proprietary system - they offer broad compatibility with other insert shaper platforms accepting 40mm or 50mm knives.
• Buying knives as a matched pair ensures balanced loading on the cutter head, which promotes smoother cuts, longer spindle bearing life, and a more consistent finished profile across every workpiece.

Specifications

• Manufacturer Part Number: 690.057
• Brand: CMT Orange Tools
• Cutting Height: 1-37/64 in.
• Maximum Thickness: 5/32 in.
• Knife Size (metric): 40x4mm
• Material: Alloyed Steel (SP)
• Quantity: 2 knives (pair)
• System Compatibility: CMT Insert Shaper System - 692 series cutter heads; universal cutter heads accepting 40x4mm or 50mm profile knives

Approved Applications

• Molding and profiling on spindle moulders and moulding machines
• Cabinet door making and frame-and-panel work
• Edge profiling and decorative edging
• Profile and edging machine operations
• Hardwood and softwood shaping
• MDF and chipboard profiling