Product Description
CMT 690.171 Profile Knives for Insert Shaper System - 1-37/64" x 5/32" (40x4mm), 2-Pack are precision-ground alloyed steel shaper knives designed for use with CMT universal cutter heads. Sold as a matched pair, these profile knives slot directly into the CMT insert shaper system, giving woodworkers a fast, repeatable way to switch molding profiles on a spindle moulder, moulder, or profile and edging machine. Whether you are cutting cabinet door profiles, producing decorative molding, or shaping frame and panel components, the 690.171 knives deliver consistent results across hardwood, softwood, MDF, and chipboard.
Key Features
- Alloyed Steel Construction - the knives are made of alloyed steel for durability and long-lasting performance session after session, reducing downtime from frequent replacements.
- 40x4mm Knife Size (1-37/64" cutting height x 5/32" maximum thickness) - precise dimensional sizing ensures a correct, secure fit in compatible universal cutter heads, eliminating play or misalignment during profiling cuts.
- 4mm Radius Profile - delivers a clean, repeatable curved profile in a single pass, making it ideal for molding, edge profiling, and decorative woodwork without secondary sanding steps.
- Matched Pair Design - sold as a pair of 2 knives, both ground to the same profile, so both cutting edges produce identical geometry and balanced cutting forces for a smoother finish.
- Part of the CMT Universal Cutter Head System - designed to work with CMT insert shaper cutter heads, giving you access to a wide variety of interchangeable profile knives from a single system investment.
Why This Product
- Expand your shaper profile library without buying new cutter heads - because these knives fit the CMT universal insert shaper system, you simply swap knives to change profiles, saving significant cost compared to purchasing dedicated cutters for each shape.
- Consistent 4mm radius results every time - precision-ground alloyed steel blades hold their profile geometry over repeated use, meaning less time tweaking setup and more time producing finished parts.
- Versatile material compatibility - the knives perform across hardwood, softwood, MDF, and chipboard, making them a practical choice for shops that work with multiple wood species and sheet goods.
- Sold in a matched pair - having both knives from the same production batch means balanced cutting performance and uniform profile depth, which is critical for clean molding and edge work on finished pieces.
Specifications
- Manufacturer Part Number: 690.171
- Brand: CMT Orange Tools
- Cutting Height: 1-37/64"
- Radius: 4mm
- Maximum Thickness: 5/32"
- Material: Alloyed Steel (SP)
- Quantity: 2 knives (sold as a pair)
- System Compatibility: CMT Insert Shaper System - Universal Cutter Heads
Approved Applications
- Molding and Profiling
- Cabinet Door Making
- Edge Profiling
- Frame and Panel Work
Frequently Asked Questions
What cutter heads are these profile knives compatible with?
The 690.171 profile knives are designed for use with CMT universal insert shaper cutter heads. They are part of a system that accepts a variety of interchangeable profile knives, allowing you to change profiles without replacing the entire cutter head assembly.
What materials can I cut with these knives?
These alloyed steel profile knives are suited for use on hardwood, softwood, MDF, and chipboard - covering the most common solid wood species and sheet goods found in cabinet, millwork, and furniture production.
How many knives are included in this purchase?
The 690.171 is sold as a matched pair - you receive 2 knives. Both knives in the pair share the same ground profile geometry, which is required for balanced cutting performance in a double-knife cutter head setup.
What is the exact knife size for the 690.171?
Each knife measures 1-37/64" in cutting height and 5/32" in maximum thickness, corresponding to the 40x4mm metric designation. The profile features a 4mm radius, which determines the shape of the molding or edge produced in the workpiece.
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