Hole Saw bi-metal 40 mm Verto 60H931

Hole Saw bi-metal 40 mm Verto 60H931 is a bi-metal hole saw with a 40 mm cutting diameter designed for creating clean circular holes in metal, wood and plastics. The tool combines a high-speed steel cutting edge with a flexible alloy backing to balance cutting performance and durability. It is compatible with hand-held drills and drill presses and is intended for tasks such as electrical conduit routing, pipe penetrations and general installation work.

Advantages

The bi-metal construction joins a hardened cutting edge to a flexible body, providing resistance to heat and wear while reducing the risk of tooth breakage. A 40 mm cutting diameter offers a standardized opening size for many installation fittings, and the geometry of the teeth is optimized for cutting through thin sheet metal, soft timber and plastic panels. The saw is suitable for use with common drill chucks and can be mounted on a mandrel for guided drilling, giving controlled results in through-holes.

Suitable for

• Drilling neat round openings for electrical conduits and cable glands
• Creating pipe penetrations and service entries in walls or panels
• Cutting holes in sheet metal, plywood, MDF and plastic panels
• On-site installation work with hand-held drills or bench drill presses

When it may not be suitable

This hole saw is intended for cutting thin to moderate-thickness materials; it is not optimized for prolonged heavy-duty cutting in very thick steel or hard structural materials. For precision holes in hardened steel, cast iron or very thick laminates, specialized cutters or machining methods may be more appropriate. Users should also avoid applying excessive axial force or very high feed rates that could overheat the cutting edge.

Key specifications

• Cutting diameter: 40 mm
• Material: bi-metal (high-speed steel edge with flexible alloy backing)
• Suitable materials: metal sheets, wood, plastics
• Compatible with: hand-held drills and drill presses (with appropriate mandrel)

How to use

Fit the hole saw securely to a compatible arbor or mandrel and tighten the chuck. Mark the centre point of the hole and, if possible, use a pilot drill to guide the saw and improve accuracy. Start drilling at low speed to establish the cut, then increase speed moderately while maintaining steady pressure. Periodically withdraw the saw to clear chips and reduce heat buildup. After cutting, file or deburr the edge of the hole if needed to remove sharp metal or plastic burs.

What to consider before purchase

• Ensure the 40 mm diameter matches the required fitting or conduit size
• Check material compatibility—suitable for thin to moderate-thickness metal, wood and plastic
• Confirm you have a compatible arbor/mandrel and drill with sufficient power
• Consider spare hole saws or replacement blades for frequent professional use

Usage recommendations

Use coolant or periodic lubrication when cutting metal to reduce heat and extend the life of the bi-metal cutting edge. Maintain moderate speed and steady feed, and allow the tool to clear chips regularly to ensure clean holes and longer tool life.