The CMT ITK Plus Diamond Saw Blade for Fiber Cement - 3-3/8 in. Diameter, 6-Tooth TCG is a compact, diamond-tipped circular saw blade engineered specifically for cutting fiber cement panels, plasterboard, and Eternit products. Designed for use with portable circular saws, miter saws, radial arm saws, and table saws, this small-diameter blade delivers precise, clean cuts in ultra-hard, highly abrasive materials where standard carbide tooling would wear rapidly. The triple chip grind tooth geometry and diamond construction make it an ideal choice for fiber cement installers and tradespeople who demand consistent, chip-free results on demanding materials like HardiePlank, Fermacell, Swisspearl, and similar cementitious boards.

Key Features

• ITK Plus Diamond Tooth Technology - diamond-tipped teeth are engineered specifically for ultra-hard materials like fiber cement, providing dramatically longer service life compared to conventional carbide teeth that wear quickly against abrasive cementitious substrates.
• Triple Chip Grind (TCG) Tooth Geometry - the TCG tooth profile is purpose-built for fiber cement, plasterboard, and Eternit, alternating flat-top and chamfered teeth to reduce chipping and cracking along cut edges for cleaner, more professional results.
• 3-3/8 in. Compact Blade Diameter - the small 3-3/8 in. format is sized for portable circular saws and compact cordless tools, giving installers the ability to make accurate cuts in confined spaces and on the job site without a large stationary saw.
• 12 deg. Cutting Angle - the positive hook angle promotes smooth, controlled material feed through dense fiber cement panels, reducing the effort required to push through hard board materials.
• 6-Tooth Configuration - the low 6-tooth count maintains chip clearance and prevents heat buildup when cutting through the gritty, silica-rich composition of fiber cement, extending blade life between replacements.
• 0.071 in. Kerf Thickness with 0.055 in. Plate - the precise kerf-to-plate ratio minimizes material waste and delivers stable, vibration-free cuts, helping maintain tight tolerances when fitting fiber cement panels to layout lines.
• 15mm Bore Diameter - the 15mm arbor bore is compatible with a wide range of portable and stationary saws used in fiber cement installation, making this blade straightforward to mount without adapters on compatible machines.
• Diamond (DP) Material Construction - using diamond as the cutting material means the blade handles the silica and cement compounds in fiber cement products without the rapid dulling that defeats conventional carbide tooling in this application.

Why This Product

• Engineered for fiber cement specifically - the combination of diamond tipping and TCG tooth geometry addresses the two biggest challenges of cutting fiber cement: rapid tool wear and edge chipping. This blade is built from the ground up for this material, not adapted from a general-purpose design.
• Compact size fits the tools installers already own - the 3-3/8 in. diameter and 15mm bore are matched to the portable circular saws and compact cordless tools commonly used on fiber cement siding and panel jobs, so installers do not need to invest in additional equipment.
• Versatile across multiple ultra-hard sheet materials - beyond standard fiber cement, this blade is rated for plasterboard and Eternit, making it a single blade solution for jobsites where multiple cementitious panel products are used in the same scope of work.
• Compatible with multiple saw types - the blade runs on portable circular saws, miter saws, radial arm saws, and table saws, giving crews the flexibility to cut at the chop saw station or carry a tool to the wall for in-place cuts without switching blades.

Specifications

• Manufacturer Part Number: 236.085.06G
• Brand: CMT Orange Tools
• Diameter: 3-3/8 in.
• Bore Diameter: 15mm
• Number of Teeth: 6
• Tooth Grind: TCG (Triple Chip Grind)
• Kerf Thickness: 0.071 in.
• Plate Thickness: 0.055 in.
• Cutting Angle: 12 deg.
• Blade Material: DP (Diamond)
• Blade Series: ITK Plus

Approved Applications

• Cutting fiber cement panels and siding
• Cutting plasterboard
• Cutting Eternit cementitious sheet products
• Use with portable circular saws
• Use with miter saws
• Use with radial arm saws
• Use with table saws

Frequently Asked Questions

What makes this blade suitable for fiber cement rather than a standard carbide blade?

This blade uses diamond (DP) tipped teeth rather than carbide. Fiber cement is an ultra-hard, highly abrasive material containing silica that dulls carbide teeth very quickly. The diamond tipping in the ITK Plus series is specifically engineered for this class of ultra-hard materials, providing dramatically longer cutting life in fiber cement, plasterboard, and Eternit applications.

What is the TCG tooth grind and why does it matter for fiber cement?

TCG stands for Triple Chip Grind - a tooth geometry that alternates between a flat-top tooth and a chamfered (beveled corner) tooth. This pattern is designed for cutting hard, brittle materials like fiber cement because it reduces the risk of chipping or cracking along the cut edge, resulting in a cleaner, more professional finish on the material face.

Is the 15mm bore compatible with common portable circular saws used for fiber cement installation?

The 15mm bore diameter is sized to fit the range of portable circular saws, compact cordless saws, miter saws, radial arm saws, and table saws listed as compatible machines for this blade. Always verify your specific saw's arbor size against the 15mm bore before mounting.

Why does this blade have only 6 teeth for a cutting blade?

The 6-tooth count is intentional for fiber cement cutting. Fewer teeth create larger gullets (the spaces between teeth), which allow the dense, gritty dust produced when cutting fiber cement to clear away from the cut zone more efficiently. This reduces heat buildup at the cutting edge, which helps protect the diamond tipping and extends the working life of the blade.