CMT Solid Carbide Insert Knives (4/35 deg.) - 14.3x14.3x2.5mm, 10-Pack (HW-F1640) are precision-ground replacement insert knives engineered for CNC router heads and spindle moulders demanding consistent, high-quality cuts across a wide range of wood-based materials. Manufactured from F1640 solid carbide (HW grade), these square-format knives deliver exceptional wear resistance for demanding production environments. Each knife features four usable cutting edges and a 35 deg. grind angle optimized for clean, efficient material removal - making them a reliable choice for insert knife replacement programs in hardwood, softwood, plywood, and MDF machining applications.

Key Features

• Solid Carbide HW-F1640 Material - provides maximum hardness and wear resistance, extending service intervals and reducing downtime during long production runs compared to high-speed steel alternatives.
• 4 Cutting Edges per Knife - the square 14.3x14.3mm geometry lets operators rotate the knife to expose a fresh edge when one dulls, multiplying usable life from a single insert and lowering per-edge tooling cost.
• 4/35 deg. Grind Angle - a 4 deg. primary clearance combined with a 35 deg. secondary angle produces a sharp, precise cutting geometry that shears wood fibers cleanly and minimizes tear-out on hardwood, softwood, plywood, and MDF.
• 14.3x14.3x2.5mm Compact Format - the standardized square footprint and 6.3mm bore diameter are designed to seat securely in compatible HW-F1640 router heads and spindle moulder cutter bodies, ensuring repeatable positioning with every edge change.
• 10-Piece Pack - stocking ten knives at once supports continuous production schedules, so edge changes never stall a shift when multiple inserts need replacing simultaneously.

Why This Product

• Designed for High-Volume CNC and Spindle Moulder Operations - the F1640 solid carbide grade and four-edge design mean fewer tool changes and longer runs between service stops, directly supporting throughput on CNC machining centers, point-to-point machines, and spindle moulders.
• Four Edges Mean Four Times the Value per Insert - rather than discarding a knife when one edge dulls, operators simply rotate to the next edge, giving each insert up to four full service cycles before replacement is needed.
• Precise Geometry for a Broad Material Range - the 35 deg. grind angle is suited to cutting hardwood, softwood, plywood, and MDF, making these knives a single versatile solution across mixed-material production lines rather than requiring specialty inserts for each substrate.
• Standardized Insert Format Simplifies Stocking - the 14.3x14.3x2.5mm square profile and 6.3mm bore conform to the HW-F1640 standard, so facilities already running compatible cutter heads can order and swap inserts without modifications or custom tooling.

Specifications

• Manufacturer Part Number: S790.143.00
• Brand: CMT Orange Tools
• Grind Angle: 4/35 deg.
• Dimensions: 14.3x14.3x2.5mm
• Total Length: 14.3mm
• Cutting Depth: 14.3mm
• Cutting Height: 9/16 in.
• Diameter Bore: 6.3mm
• Teeth Thickness: 0.098 in.
• Number of Cutting Edges: 4
• Material: HW - F1640
• Quantity: 10-piece pack

Approved Applications

• Insert knife replacement in CNC router heads and spindle moulder cutter bodies
• CNC routing on machining centers and point-to-point machines
• Hardwood cutting and profiling
• Softwood cutting and profiling
• Plywood routing and shaping
• MDF routing and shaping