CMT 241.008.04 Biscuit Joiner Blade - 4" x 22mm, 8-Tooth by CMT is a precision-ground circular saw blade engineered specifically for biscuit joiner machines. Designed with a flat top grind geometry and 8 carbide teeth, this blade produces clean, flat-bottomed biscuit slots that maximize glue surface contact for strong, reliable wood joints. With a 22mm bore diameter and a 4-inch cutting diameter, it is ideal for use on Virutex biscuit joiners and also fits older Porter-Cable machines and Lamello biscuit joiners. Whether you are joining solid wood panels, MDF components, or working with plywood assemblies, this biscuit joiner blade delivers consistent slot quality in a wide range of woodworking applications.

Key Features

• Flat Top Grind (FLAT) tooth geometry - produces flat-bottomed biscuit slots for maximum glue surface area and stronger finished joints compared to angled-tooth alternatives.
• 8-tooth configuration - delivers clean, precise cuts through MDF and wood with minimal tear-out, reducing cleanup time and improving joint fit.
• 4-inch (100mm) blade diameter with 22mm bore - sized correctly for Virutex biscuit joiners and compatible with older Porter-Cable and Lamello machines, making it a versatile drop-in replacement blade.
• 15 deg. cutting angle - optimized hook angle for smooth, controlled cutting action in biscuit joiner machines, helping reduce blade deflection during the plunge cut.
• 0.156-inch kerf thickness - matches standard biscuit slot width requirements, ensuring a snug fit between the biscuit and the slot for proper joint alignment.
• Plate thickness of 0.122 - 0.150 inch - provides the structural rigidity needed to maintain a straight, consistent cut path through dense materials like MDF.
• HW (tungsten carbide) material construction - carbide teeth hold a sharp edge longer than standard steel, reducing the frequency of blade changes in production or shop environments.
• CMT PTFE Industrial coating - the trademark orange coating reduces friction and heat buildup during cutting, helping extend blade life and protect against corrosion.

Why This Product

• Purpose-built for biscuit joinery on MDF and wood - the flat grind tooth geometry and 8-tooth layout are specifically optimized for the plunge-cut motion of a biscuit joiner, giving you cleaner slots than general-purpose blades in the same size range.
• Broad machine compatibility - fits Virutex biscuit joiners as well as older Porter-Cable and Lamello machines, making it a practical choice for shops that run different biscuit joiner brands or need a reliable replacement blade.
• Carbide teeth with PTFE coating for long service life - HW (tungsten carbide) cutting edges combined with CMT's industrial PTFE coating mean less frequent blade replacement, lower long-term cost, and consistent slot quality over many cuts.
• Precise kerf and plate dimensions for proper biscuit fit - with a kerf of 0.156 inch and a plate thickness range of 0.122 - 0.150 inch, this blade produces slots sized to accept standard biscuits without excessive play, contributing directly to joint strength and panel alignment.

Specifications

• Manufacturer Part Number: 241.008.04
• Brand: CMT Orange Tools
• Blade Diameter: 4"
• Bore Diameter: 22mm
• Number of Teeth: 8
• Tooth Grind: FLAT
• Cutting Angle: 15 deg.
• Kerf (Teeth Thickness): 0.156"
• Plate Thickness: 0.122" - 0.150"
• Material: HW (Tungsten Carbide)
• Recommended Machine: Ideal for Virutex; also fits older Porter-Cable machines and Lamello biscuit joiners
• Coating: CMT PTFE Industrial coating

Approved Applications

• Biscuit joinery with biscuit joiner circular saw blades
• Cutting biscuit slots in MDF
• Cutting biscuit slots in solid wood
• Panel glue-up and edge joining

Frequently Asked Questions

Which biscuit joiner machines is this blade compatible with?

This blade is ideal for Virutex biscuit joiners. It also fits older Porter-Cable machines and Lamello biscuit joiners, making it a widely compatible replacement or upgrade blade for common shop equipment.

What materials can this blade cut?

This blade is designed for ideal use on MDF and wood. The flat top grind and carbide tooth construction handle both engineered sheet goods like MDF and solid wood species effectively in biscuit joiner applications.

What does the flat top grind tooth geometry do for biscuit slots?

The flat top grind (FLAT) produces flat-bottomed biscuit slots. This maximizes the glue surface contact area within the slot, which directly contributes to joint strength when assembling panels or frames with biscuits.

What is the purpose of the PTFE Industrial coating on this blade?

CMT's PTFE Industrial coating is applied to reduce friction and heat during cutting. This helps extend the service life of the blade and provides protection against corrosion, keeping the blade performing consistently over time.