Carbide Insert Knives With Groove

Four-Sided Carbide Insert Knives With Groove-and-Cross-Groove Mounting

Grooved carbide insert knives are precision-ground replacement cutting edges designed for compatible router bits and cutterheads that use a groove-and-cross-groove locating system instead of conventional mounting holes.

GDP Tooling supplies rectangular solid carbide insert knives with four usable cutting edges and a 35° edge bevel on all four sides.

These replacement knives are used in industrial woodworking and machining applications involving solid wood, engineered wood panels, composites, and other suitable abrasive materials.

Groove-and-Cross-Groove Insert Design

Unlike conventional carbide inserts secured through mounting holes, these knives feature a longitudinal groove and cross-groove on the back of the insert.

The grooved design interfaces with the corresponding locating and clamping features of the cutter body.

Correct engagement between the insert and its mounting system is essential for secure positioning and consistent cutting performance.

Grooved carbide inserts are not interchangeable with standard single-hole or two-hole replacement knives.

Four Reversible Cutting Edges

Each rectangular insert features four precision-ground cutting edges with a 35° bevel.

When the cutter design permits, a worn cutting edge can be replaced by indexing the insert to expose a fresh edge.

This allows multiple cutting edges to be used before the insert requires replacement, helping reduce tooling costs in repetitive production applications.

Applications for Grooved Carbide Inserts

These solid carbide replacement knives are used in compatible router tooling for operations such as:

• Jointing and straight-edge machining
• Rebating
• Beveling
• Trimming
• Machining solid wood and engineered wood panels
• Cutting suitable composite and abrasive materials

The appropriate insert dimensions, carbide grade, and cutting parameters depend on the tooling system and workpiece material.

Selecting the Correct Grooved Replacement Insert

Before ordering replacement carbide insert knives, verify:

• Overall insert length, width, and thickness
• Longitudinal groove dimensions and location
• Cross-groove geometry and position
• Cutting-edge bevel and corner configuration
• Original cutterhead or router bit specifications
• Material and machining application

Groove placement and dimensions are especially important because they determine whether the insert fits the locating features of the cutter body.

Additional Sizes & Replacement Knife Assistance

GDP Tooling’s solid carbide insert knife program includes additional dimensions and configurations beyond those displayed online.

Many replacement inserts appear similar but differ in important mounting or cutting-edge details. For this reason, we recommend verifying the original specifications before ordering.

If the required grooved carbide insert is not listed, contact GDP Tooling with the knife dimensions, original part number, cutterhead information, or a sample.

Our team can assist with identifying suitable replacement knives or evaluating custom manufacturing options.

Grooved carbide insert knives are sold in boxes of 10 pieces.