Hole Saw Bosch Bi‑Metal Single for Drill, 40 mm diameter, for drywall metal plastic softwood

Bosch Bi‑Metal single hole saw, 40 mm diameter, is designed for making precise circular holes in drywall, metal, plastic and softwood. The bi‑metal construction combines a high‑speed steel tooth edge with a flexible body to deliver clean, consistent cuts during construction and installation work. Supplied as a single piece, this hole saw is compatible with standard adapters and suitable for use where a cutting depth of approximately 44 mm is required.

Advantages

The bi‑metal HSS tooth edge with cobalt alloy content improves wear resistance and extends tool life while maintaining sharpness. The Vario tooth strip provides efficient material removal and reduced vibration for smoother cutting action. A flexible body design reduces breakage risk and allows the saw to withstand changing loads during use. Compatibility with common adapters simplifies tool setup and replacement.

Suitable for

• Cutting circular holes in drywall for electrical and plumbing installations
• Drilling openings in ferrous and non‑ferrous metals for conduit and ventilation
• Creating cable and pipe pass‑throughs in plastic surfaces
• Making clean holes in softwood for carpentry and joinery tasks

Key specifications

• Diameter: 40 mm
• Material: bi‑metal construction with HSS tooth edge and flexible body
• Tooth design: Vario tooth strip for smooth cutting
• Cobalt content in cutting edge: approximately 8% (HSS alloy)
• Recommended cutting depth: up to 44 mm
• Compatibility: fits standard hole saw adapters and arbors
• Quantity: single piece

How to use

Mount the hole saw onto a suitable arbor or adapter compatible with your drill, ensuring secure attachment before operation. Mark the centre point of the hole and start drilling at low speed to establish a pilot. Increase speed progressively while applying steady, moderate pressure; avoid forcing the saw to prevent overheating and premature wear. For metal and plastic, use cutting lubricant as appropriate and periodically withdraw the saw to remove debris. After completing the cut, clean swarf from the teeth and inspect for damage before reuse.

Usage recommendations

Use appropriate personal protective equipment, including safety glasses and gloves. Match drill speed and feed rate to the material being cut: lower speeds for metals, moderate speeds for plastics and wood. For extended cutting in metals, apply light cutting oil and allow the tool to cool periodically to preserve the HSS cutting edge. Replace the hole saw if teeth become worn or damaged to maintain hole quality.