IRWIN MARATHON 235MM CIRCULAR SAW BLADES

The IRWIN 235mm 40T Marathon Circular Saw Blade is a durable, high-speed general purpose blade suitable for cutting a variety of materials including soft and hard woods, plywood, chipboard, plastics, and more. It is designed for both rip and cross-cutting applications. 

Key Features and Specifications
Blade Diameter: 235 mm (9-1/4 in).
Teeth Count: 20T & 40T.
Material: High-density tungsten carbide tips for enhanced durability and edge retention.
Arbor Size: Typically 25mm, sometimes available with a 16mm bush/adapter.
Kerf: Features a patented EVO alternating thin kerf design for faster cutting speed.

Design Features:
Perimeter heat vents: Help manage heat and aid in chip ejection to prevent warping.
Thicker plate design: Provides improved tracking, less vibration, and resists wandering compared to thin plate blades.
Reinforced shoulder geometry: Offers additional durability and impact resistance.
Applications: Ideal for combination cutting (both rip and cross-cutting) in various woods (hardwood, softwood, plywood, chipboard), as well as plastics and composite board.
Max RPM: According to need1.com.au, the maximum speed is 6700 rpm.