CMT 240.008.04 Biscuit Joiner Blade - 4 in. x 22mm, 8-Tooth is a precision-ground circular saw blade engineered specifically for biscuit joinery machines. Built from HW (hardmetal/carbide) tooth material and finished with CMT's signature PTFE Industrial coating, this blade delivers clean, accurate biscuit slots in MDF and solid wood with minimal tearout. The 22mm bore and versatile pin hole configuration make it compatible with Lamello, DeWalt, Skil, Bosch, Freud, and similar biscuit joiner machines - giving woodworkers and cabinetmakers a reliable cutting solution across a wide range of job-site and shop tools.

Key Features

• 4 in. Blade Diameter with 22mm Bore - matches the standard sizing for professional biscuit joiner machines, ensuring secure, accurate seating in compatible tools without adapter hardware.
• 8-Tooth ATB Geometry at 10 deg. Sharpening Angle - the Alternate Top Bevel configuration shears wood fibers cleanly rather than tearing them, producing smooth slot walls that improve glue surface contact for stronger biscuit joints.
• 15 deg. Cutting Angle (Hook Angle) - the positive hook geometry keeps the blade feeding predictably through MDF and hardwood, reducing the effort needed on each plunge cut.
• HW (Tungsten Carbide) Tooth Material - carbide holds a sharp edge significantly longer than steel, meaning fewer sharpenings over the blade's service life and consistent slot quality cut after cut.
• PTFE Industrial Coating - CMT's trademark non-stick coating reduces friction, heat buildup, and pitch accumulation during cutting, protecting the blade body and extending working life between cleanings.
• 0.156 in. Kerf / 0.118 in. Plate Thickness - the kerf-to-plate ratio produces biscuit slots with enough side clearance for proper biscuit expansion when glue is applied, while the thin plate minimizes material waste.
• Pin Hole Configuration 4/4.5 - 9.5/36 - broad pin hole compatibility means this blade fits a wide range of biscuit joiner arbor styles without requiring additional adapters.

Why This Product

• Fits Lamello, DeWalt, Skil, Bosch, Freud, and similar biscuit joiners - so you can upgrade or replace an existing blade without buying a machine-specific part or hunting for a specialty supplier.
• ATB tooth geometry at 10 deg. sharpening produces clean slot walls in both MDF and natural wood, two of the most common biscuit joinery materials, reducing sanding and rework time after cutting.
• The PTFE Industrial coating actively resists pitch and resin buildup during repetitive cuts, keeping the blade running cooler and cleaner for longer sessions without performance degradation.
• Carbide (HW) tooth material paired with a 15 deg. hook angle gives this blade the edge retention and feed characteristics needed for production joinery work, where consistent slot dimensions matter for panel alignment and assembly fit.

Specifications

• Manufacturer Part Number: 240.008.04
• Brand: CMT Orange Tools
• Blade Diameter: 4 in.
• Bore Diameter: 22mm
• Number of Teeth: 8
• Tooth Grind: 10 ATB
• Cutting Angle: 15 deg.
• Kerf Thickness: 0.156 in.
• Plate Thickness: 0.118 in.
• Pin Hole: 4/4.5 - 9.5/36
• Tooth Material: HW (Tungsten Carbide)
• Coating: PTFE Industrial

Approved Applications

• Biscuit joinery in MDF panels and sheet goods
• Biscuit joinery in solid wood (hardwood and softwood)
• Panel glue-up alignment with biscuit joiner machines
• Cabinetry assembly and furniture joining

Frequently Asked Questions

Which biscuit joiner machines is this blade compatible with?

This blade is designed to fit Lamello, DeWalt, Skil, Bosch, Freud, and similar biscuit joiner machines. The 22mm bore diameter and 4/4.5 - 9.5/36 pin hole configuration cover a broad range of standard biscuit joiner arbor styles.

What materials can this blade cut?

The CMT 240.008.04 is ideal for use on MDF and wood, including applications in solid hardwood and softwood panels. The 10 ATB tooth geometry is specifically suited to these materials, minimizing tearout at the slot edges.

What does the PTFE Industrial coating do?

CMT's PTFE Industrial coating is a non-stick surface treatment applied to the blade body. It reduces friction and heat during cutting, resists pitch and resin buildup, and helps protect the blade from corrosion - extending the working life of the blade between cleanings and sharpenings.

What is the difference between the kerf thickness and the plate thickness on this blade?

The kerf thickness is 0.156 in., which is the total width of the slot the blade cuts - determined by the carbide tooth tips. The plate thickness is 0.118 in., which is the width of the blade body itself. The difference between these two measurements (the side clearance) allows the blade to move freely through the cut without binding.