Hole Saw Bosch Bi‑Metal Single for Drill, Diameter 1.9 cm, for Drywall Metal Plastic Softwood

Bosch Bi‑Metal single hole saw for drill, diameter 1.9 cm, is designed to cut precise circular openings in drywall, thin metals, non‑ferrous metals, plastic and softwood. The bi‑metal construction combines a high‑speed steel (HSS) cutting edge with a more flexible body to balance hardness and resilience, reducing the likelihood of breakage during typical installation tasks. Supplied as a single unit, this hole saw is compatible with standard hole saw arbors and fits common drill setups used in carpentry, electrical and plumbing work.

Advantages

The bi‑metal design provides durable cutting performance by pairing an HSS tooth strip with a flexible backing that resists cracking. The Vario tooth configuration promotes smooth, controlled cuts across a range of materials. Its 1.9 cm diameter and 44 mm cutting depth make it suitable for creating neat openings for conduit, pipes, cable glands and small fixtures. Compatibility with standard adapters ensures quick fitting to most drill arbors.

Suitable for

• Cutting openings in drywall for electrical boxes and cable entries
• Making holes in thin steel and non‑ferrous metal sheets
• Drilling through plastic panels and trunking
• Creating pilot holes or openings in softwood for plumbing and carpentry tasks

Key specifications

• Diameter: 1.9 cm
• Material: Bi‑metal with HSS tooth strip containing cobalt alloy
• Tooth configuration: Vario tooth strip for smooth cutting
• Cutting depth: 44 mm
• Compatibility: Fits standard hole saw arbors and adapters

How to use

Select a suitable drill and arbor that accept the 1.9 cm hole saw. Secure the arbor in the drill chuck, mount the hole saw onto the arbor according to the arbor manufacturer’s instructions, and ensure the pilot bit (if present) is centered. Mark the location on the workpiece, clamp the material to prevent movement, and start drilling at low speed to establish the cut. Gradually increase speed and apply steady, moderate pressure; clear chips regularly to avoid clogging. After cutting, retract the hole saw and remove any remaining slug from the cup.

Usage recommendations

Use appropriate personal protective equipment such as safety glasses and gloves. For metal and plastic, use cutting lubricant where recommended to extend tool life and improve finish. Do not force the tool; allow the bi‑metal teeth to cut at their own rate and avoid excessive side loading. Inspect the hole saw before use for signs of wear or damage and replace if teeth are blunt or the body is distorted.