Product Description
CMT 690.121 Profile Knives for Insert Shaper System are precision-crafted replacement knives designed for use with CMT universal cutter heads, giving woodworkers a reliable solution for molding, profiling, and cabinet door work. Sized at 1-37/64 in. cutting height and 5/32 in. maximum thickness (40x4mm), these alloyed steel knives are sold in a pair of 2 and slot directly into the CMT insert shaper system for fast, consistent profile changes on spindle moulders and profile machines.
Key Features
- Pair of knives sized 40x4mm (1-37/64 in. x 5/32 in.) - the matched pair format ensures balanced cutting performance and minimizes vibration during profiling operations.
- Alloyed steel construction - delivers long-lasting performance across repeated shaper runs, reducing downtime from frequent knife changes when working hardwood, softwood, MDF, or chipboard.
- Designed for the CMT Universal Cutter Head insert system - compatible with a variety of CMT cutter heads, so one system can support multiple profiles simply by swapping knives.
- Profile number 121 specific geometry - purpose-ground to a defined molding profile, providing repeatable, clean results on frame and panel work, edge profiling, and cabinet door making without additional setup grinding.
- Long-lasting performance by design - the alloyed steel material choice extends service life, meaning fewer interruptions and lower cost per linear foot of profile cut over time.
Why This Product
- Woodworkers who already run a CMT insert shaper cutter head can expand their profile library simply by adding these knives - no new tooling body required, which lowers the cost of adding a new molding profile to a shop's repertoire.
- The 40x4mm knife size fits the CMT universal cutter head system, meaning the same knives work across a variety of compatible machines including spindle moulders, moulders, and profile and edging machines.
- Alloyed steel construction supports long-lasting performance on demanding materials like hardwood and MDF, making these knives a practical choice for production environments where durability directly affects output quality.
- Sold as a matched pair, these knives are ready to install as a complete set - no need to source individual blades or verify pairing compatibility separately.
Specifications
- Manufacturer Part Number: 690.121
- 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 (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
- Spindle Moulder Operations
- Profile and Edging Machine Operations
What's Included
- 2x CMT 690.121 Profile Knives (40x4mm, Profile 121) - matched pair
Frequently Asked Questions
What cutter heads are these knives compatible with?
The CMT 690.121 knives are designed for the CMT Insert Shaper System and are compatible with CMT universal cutter heads. The 40x4mm knife size fits a variety of cutter heads within that system family.
How many knives are included in one purchase?
Each purchase includes a matched pair of 2 knives (KSS 40x4mm). The pair is designed to be installed together for balanced, vibration-free cutting performance.
What materials can these profile knives cut?
These alloyed steel knives are suited for use on hardwood, softwood, MDF, and chipboard - common materials in cabinet door making, frame and panel construction, and edge profiling applications.
Can these knives be used on machines other than a spindle moulder?
Yes. The CMT insert shaper system knives are designed for use with compatible machines including spindle moulders, moulders, and profile and edging machines that accept the 40x4mm knife size within the CMT universal cutter head system.
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