Hole Saw (Bimetal) Irwin 25 mm 10504169 — bimetal hole saw for metal and wood

Irwin bimetal hole saw 25 mm is a circular cutting tool designed for making clean, consistent holes with a 25 mm diameter in metal, wood and plastic materials. The bimetal construction combines high-speed steel cutting edges with a flexible backing to provide improved durability and heat resistance during prolonged drilling. The hole saw is compatible with standard drill chucks and drill presses and is intended for trades and installation work where accurate round openings are required.

Advantages

The bimetal design offers a balance of toughness and cutting performance, reducing wear when cutting through mild steel and wood. Hardened teeth retain sharpness longer than simple carbon-steel saws, and the construction tolerates higher temperatures generated during fast drilling. The 25 mm diameter provides a standard size for conduit, pipe and cable penetrations while remaining compact and easy to handle on portable drills or bench-mounted equipment.

Suitable for

• Drilling holes for electrical conduit and cable glands
• Creating openings for HVAC fittings and pipes
• Installing fixtures and hardware in metal or wooden panels
• General trade and maintenance tasks where a 25 mm hole is required

Key specifications

• Cutting diameter: 25 mm
• Material: bimetal construction (high-speed steel teeth with flexible backing)
• Compatible with: standard drill chucks and drill presses
• Suitable workpiece materials: mild steel, sheet metal, wood, plastics
• Tooth design: hardened cutting teeth for improved wear resistance

How to use

Secure the hole saw in the drill chuck or arbor according to the drill manufacturer’s instructions and make sure the pilot bit or center guide is fitted if required. Mark the hole centre on the workpiece and clamp the workpiece to prevent movement. Start drilling at low speed to establish the cut, then increase speed as appropriate for the workpiece material while maintaining steady pressure. Periodically withdraw the saw to clear chips and reduce heat buildup. After cutting, deburr the edge of the hole as needed.

Usage recommendations

Use cutting lubricant or coolant when drilling metals to extend tool life and improve cutting performance. Forcing the tool or using excessive speed on hard metals can cause premature wear; match speed and feed to the material. Wear appropriate personal protective equipment such as eye protection and gloves, and secure small or thin workpieces by clamping to avoid vibration and inaccurate cuts.