The CMT ITK Fine Finish Saw Blade - 8-1/4" x 5/8" T40 ATB is a general purpose circular saw blade engineered for clean, accurate cuts in a wide range of wood-based materials. Designed to fit cordless circular saws, corded circular saws, and miter saws, this 40-tooth ATB blade delivers consistent fine finish results when cutting hardwood, softwood, OSB, pressure treated lumber, and laminated beams. Whether you are crosscutting dimensional lumber or slicing through engineered wood products, this blade's Alternate Top Bevel tooth geometry and precision-brazed carbide tips make it a versatile choice for both job site and workshop use.

Key Features

• Alternate Top Bevel (ATB) Tooth Grind at 15 deg. - each tooth is angled to shear wood fibers cleanly, reducing tearout and producing smooth edges in hardwood, softwood, and composite materials without requiring a secondary finishing pass.
• Tri-Metal Silver-Copper-Silver Brazing - the special layered brazing process bonds carbide teeth with greater strength and resilience, allowing the blade to handle high stress and impact when cutting harder woods and composite material with fewer tooth failures over time.
• Blade Body Flatness via Special Straightening Processes - exceptionally reduced tolerances in the blade body minimize wobble and deflection during the cut, translating directly into tighter kerf lines and more accurate workpieces.
• Precision Balancing on All Saw Blades - factory-balanced construction guarantees maximum stability at speed, reducing vibration transmitted to the saw and the operator for smoother, more controlled cuts.
• 0.094" Kerf Thickness with a 0.063" Plate - the thin kerf design removes less material per cut, reducing strain on cordless saw batteries and lower-powered corded saws while still maintaining blade rigidity.
• 9,000 RPM Maximum Rating - rated for high-speed operation to match the demands of both corded and cordless 8-1/4" circular saws and miter saws at full power.
• Knock-Out Pin Hole with 5/8" Bore (15.88mm) - the convertible bore fits a broad range of 8-1/4" saws directly, and the knock-out arbor insert accommodates different spindle sizes for added compatibility.
• HW (Tungsten Carbide) Tooth Material - hard tungsten carbide tips stay sharp through extended use in abrasive materials like OSB and pressure treated lumber, extending the interval between blade sharpenings.

Why This Product

• Cordless and corded saw compatibility in one blade - the thin 0.063" plate and 0.094" kerf reduce the load on battery-powered saws while the 9,000 RPM rating keeps pace with full-speed corded tools, making this a practical single-blade solution across a mixed tool lineup.
• Built for high-stress cutting scenarios - the Tri-Metal Silver-Copper-Silver brazing is specifically designed to handle high stress and impact, which matters when working through pressure treated lumber, laminated beams, or OSB where lesser blades lose teeth or dull prematurely.
• Precision-straightened and balanced body means the blade tracks true from the first cut to the last - reduced tolerances in flatness and factory balancing work together to minimize drift and vibration, keeping cuts on the line even in demanding production environments.
• 40-tooth ATB geometry at a 10 deg. hook angle strikes the right balance between cut speed and finish quality - aggressive enough to rip through hardwood and softwood efficiently, refined enough to produce clean edges in laminated beams and composite panels.

Specifications

• Manufacturer Part Number: 251.040.08
• Brand: CMT Orange Tools
• Diameter: 8-8-1/4"
• Bore Diameter: 15.88mm (5/8")
• Pin Hole: Knock Out
• Number of Teeth: 40
• Tooth Grind: ATB 15
• Cutting Angle: 10 deg.
• Kerf Thickness: 0.094"
• Plate Thickness: 0.063"
• Maximum RPM: 9,000
• Tooth Material: HW (Tungsten Carbide)

Approved Applications

• General purpose cutting - hardwood and softwood
• OSB (Oriented Strand Board)
• Pressure treated lumber
• Laminated beams
• Compatible machines: cordless circular saw, corded circular saw, miter saw

Frequently Asked Questions

What saws is this blade compatible with?

This blade is designed to fit cordless circular saws, corded circular saws, and miter saws that accept an 8-1/4" blade with a 5/8" (15.88mm) bore. The knock-out pin hole design allows the arbor insert to be removed to accommodate different spindle configurations.

What is the maximum RPM rating for this blade?

This blade is rated for a maximum of 9,000 RPM. Always verify that your saw's no-load RPM does not exceed this rating before use to ensure safe operation.

What tooth grind type does this blade use, and why does it matter?

This blade uses an Alternate Top Bevel (ATB) grind at 15 deg. In an ATB configuration, teeth alternate between left and right bevel angles. This geometry shears wood fibers on both sides of the kerf simultaneously, which reduces tearout and produces cleaner cut edges in hardwood, softwood, OSB, pressure treated lumber, and laminated beams compared to a flat-top grind.

What makes the Tri-Metal brazing on this blade significant?

The special Silver-Copper-Silver Tri-Metal brazing process bonds the carbide teeth to the blade body using three layers of metal rather than a single braze material. This layered approach is designed to handle high stress and impact - particularly important when cutting harder woods and composite materials where sudden load changes could otherwise cause tooth separation on a conventionally brazed blade.