The CMT ITK Contractor Saw Blade Finish - 8-1/4 in. x 5/8 in. - 40 Tooth ATB is a purpose-built circular saw blade designed for clean finishing cuts in wood-based materials using portable and cordless circular saws. With a 40-tooth Alternate Top Bevel grind and a 20 deg. hook angle, this blade excels at producing smooth crosscuts in soft and hardwood, plywood, OSB sheets, and panels and lumber. The thin 0.047 in. plate thickness reduces drag and battery draw, making it a smart pairing for cordless tool setups where efficiency matters.

Key Features

• 40-Tooth ATB Grind at 10 deg. - the Alternate Top Bevel tooth geometry sharpened at 10 deg. slices wood fibers cleanly across the grain, producing finished crosscut edges that require little to no additional sanding or trimming.
• 20 deg. Hook Angle - a positive 20 deg. cutting angle keeps the blade feeding smoothly through soft and hardwood, panels, plywood, and OSB without grabbing or splintering the workpiece surface.
• 0.071 in. Kerf Thickness - a thin kerf removes less material per pass, reducing waste and lowering the power demand on cordless circular saws to extend runtime between charges.
• 0.047 in. Plate Thickness - a slender plate reduces overall blade mass and flex resistance, contributing to stable and accurate cuts in portable saw applications.
• 5/8 in. Bore with Reduction Rings - the primary bore fits standard 5/8 in. arbors, and included reduction rings for 1/2 in. and 10mm bores broaden compatibility across a wider range of portable and cordless circular saws without buying additional adapters.
• HW Carbide Tooth Material - hard metal carbide tips maintain a sharp cutting edge longer than standard steel teeth, delivering consistent finish quality cut after cut through demanding materials like OSB and hardwood.
• Optimized for Portable and Cordless Circular Saws - the combination of thin kerf, low plate mass, and contractor-focused geometry makes this blade a practical choice for job-site cutting where weight, balance, and battery conservation are real priorities.

Why This Product

• Contractors and woodworkers who need a clean finish cut from a cordless circular saw will benefit from the 40-tooth ATB geometry, which is specifically configured for finish-quality crosscutting rather than coarse ripping - reducing the need for secondary cleanup work on the job site.
• The included reduction rings for 1/2 in. and 10mm bores mean this single blade can mount on a broader selection of portable circular saws, eliminating the hassle of sourcing separate adapters for different tools in a multi-saw crew environment.
• At 0.071 in. kerf and 0.047 in. plate thickness, this blade is engineered with cordless saw efficiency in mind - less material removed per stroke translates directly to reduced motor strain and longer battery life during extended cutting sessions.
• The 40-tooth count at the 8-1/4 in. diameter hits the right balance for finish work across common job-site sheet goods including plywood, OSB sheets, and lumber panels - one versatile blade that handles the range of materials a contractor encounters daily.

Specifications

• Manufacturer Part Number: K04008
• Brand: CMT Orange Tools
• CMT Part Number: CMT-K04008
• Diameter: 8-1/4 in.
• Bore Diameter: 5/8 in. (15.87mm)
• Number of Teeth: 40
• Tooth Grind: ATB (Alternate Top Bevel)
• Sharpening Angle: 10 deg. ATB
• Cutting (Hook) Angle: 20 deg.
• Kerf (Tooth) Thickness: 0.071 in.
• Plate Thickness: 0.047 in.
• Maximum RPM: 9,000
• Tooth Material: HW (Hard Metal Carbide)
• Blade Series: ITK Contractor Finish

Approved Applications

• Finishing crosscuts in soft and hardwood
• Cutting panels and lumber
• Cutting plywood sheets
• Cutting OSB sheets

What's Included

• CMT K04008 ITK Contractor Finish Saw Blade - 8-1/4 in. x 5/8 in. - 40 Tooth ATB
• Reduction ring for 1/2 in. bore
• Reduction ring for 10mm bore

Frequently Asked Questions

What types of saws is this blade compatible with?

This blade is designed for use with portable and cordless circular saws. The 8-1/4 in. diameter and 5/8 in. primary bore fit the standard arbor size found on most 8-1/4 in. cordless and corded portable circular saw models. Included reduction rings also allow mounting on saws with 1/2 in. and 10mm arbors.

Is this blade suitable for ripping lumber or is it a finish-only blade?

The K04008 is configured specifically for finishing crosscuts. Its 40-tooth ATB grind at 10 deg. and 20 deg. hook angle are optimized to produce clean, finish-quality cuts across the grain in soft and hardwood, plywood, OSB, and panels and lumber - rather than fast, coarse ripping.

What reduction rings are included with this blade?

The blade includes reduction rings for both 1/2 in. and 10mm bore sizes, in addition to the primary 5/8 in. (15.87mm) bore. This allows the blade to fit a wider range of portable and cordless circular saw arbors without purchasing additional adapters separately.

What is the maximum RPM rating for this blade?

The CMT K04008 is rated for a maximum of 9,000 RPM. Always verify that the maximum RPM of your saw does not exceed the blade's rated limit before use, and follow all safety guidelines for circular saw blade operation.