CMT Heavy-Duty General Purpose Saw Blade - 250 x 30mm, 40-Tooth ATB is a professional-grade circular saw blade engineered for demanding ripping and crosscutting tasks across a wide range of materials. Designed for use on miter saws, slide miter saws, stationary table saws, and portable table saws, this 250mm blade with a 30mm metric bore delivers clean, accurate cuts through hardwood, softwood, plywood, veneered panels, melamine, and chipboard. The 40-tooth Alternate Top Bevel (ATB) grind at 10 deg. produces smooth finished edges on both rip cuts and crosscuts, making it a versatile choice for woodworking shops and job-site professionals alike.

Key Features

• 40-Tooth ATB 10 deg. Grind - the Alternate Top Bevel tooth geometry at 10 deg. sharpening shears material cleanly on both rip and cross cuts, reducing tearout and leaving a refined finish on hardwood, softwood, and engineered sheet goods.
• 5 deg. Cutting Angle - a positive hook angle delivers efficient material removal during ripping and crosscutting, reducing feed resistance and helping the blade move through stock with less effort.
• COMBI3 Pin Hole Configuration - the combination bore and pin hole pattern ensures precise, wobble-free seating on compatible machines, contributing to accurate, repeatable cuts.
• 30mm Metric Bore - fits the standard metric arbors found on miter saws, slide miter saws, stationary table saws, and portable table saws, providing broad machine compatibility without adapters.
• 7,600 Maximum RPM Rating - a high-speed rating means this blade operates safely at the full speed of most compatible metric-arbor saws, maintaining stability and cutting performance under load.
• Hard Metal (HW) Carbide Tips - tungsten carbide tip material resists wear and heat buildup during heavy-duty general purpose cutting, extending the useful life of the blade across demanding production use.
• Heavy-Duty General Purpose Design - a single blade configuration that handles both rips and crosscuts on hardwood, softwood, plywood, veneered panels, melamine, and chipboard, reducing the need to swap blades between tasks.
• 0.126 in. Kerf / 0.087 in. Plate - the kerf-to-plate ratio balances material removal efficiency with blade rigidity, supporting stable tracking through dense or layered sheet materials.

Why This Product

• One blade for rips and crosscuts - the heavy-duty general purpose classification means this 40-tooth ATB blade handles both ripping and crosscutting on hardwood, softwood, plywood, veneered panels, melamine, and chipboard without needing a dedicated rip blade or crosscut blade for each task.
• Compatible with the widest range of metric-arbor machines - the 30mm bore and COMBI3 pin hole pattern fit miter saws, slide miter saws, stationary table saws, and portable table saws, making this a practical choice for shops that run multiple machine types.
• Built for high-speed operation - the 7,600 RPM maximum rating allows this blade to run at the full operating speed of most compatible saws, maintaining cutting efficiency and stability without requiring speed reduction.
• Hard metal carbide construction for durability - HW-grade carbide tips are selected for their ability to withstand the abrasion and heat generated during heavy-duty cutting cycles, keeping the blade in service longer between sharpenings.

Specifications

• Manufacturer Part Number: 285.640.10M
• Brand: CMT Orange Tools
• Diameter: 250mm
• Bore Diameter: 30mm
• Number of Teeth: 40
• Tooth Grind Type: ATB 10
• Cutting Angle: 5 deg.
• Kerf Thickness: 0.126 in.
• Plate Thickness: 0.087 in.
• Pin Hole: COMBI3
• Maximum RPM: 7,600
• Tip Material: HW (Hard Metal Carbide)
• Application: Heavy-Duty General Purpose

Approved Applications

• Ripping - hardwood and softwood solid lumber
• Crosscutting - hardwood and softwood solid lumber
• Cutting plywood and veneered panels
• Cutting melamine-faced board
• Cutting chipboard and particle board

Frequently Asked Questions

What machines is this 250mm saw blade compatible with?

This blade is designed for use with miter saws, slide miter saws, stationary table saws, and portable table saws that accept a 30mm metric arbor bore. The COMBI3 pin hole configuration provides additional mounting compatibility across a range of these machine types.

What is ATB tooth geometry and why does it matter for general purpose cutting?

ATB stands for Alternate Top Bevel, which means each successive tooth is beveled in alternating directions across the top edge. On this blade, the bevel is ground at 10 deg. This geometry shears wood fibers cleanly on both sides of the cut, making it well suited for crosscutting and ripping through hardwood, softwood, plywood, veneered panels, melamine, and chipboard while minimizing tearout.

What is the maximum safe operating speed for this blade?

This blade is rated for a maximum of 7,600 RPM. Always ensure your saw does not exceed this speed before mounting the blade, and confirm your machine's specifications against this rating for safe operation.

Can this blade cut melamine and veneered plywood without chipping the surface?

Yes. The 40-tooth ATB 10 deg. grind is specifically suited for cutting melamine-faced boards and veneered plywood, as the alternating bevel geometry scores and severs the surface laminate cleanly. The 5 deg. cutting angle supports controlled material entry, which further helps reduce edge chipping on coated and veneered surfaces.