Hole saw bi-metal Glob Premium in situ 200/212 mm

Bi-metal hole saw Glob Premium in situ 200/212 mm is designed to cut large precise circular openings in a variety of common construction materials. The tool features a bi-metal cutting edge for improved wear resistance and toughness while remaining compatible with standard arbors and drill drives. It allows production of holes with nominal diameters of 200 mm or 212 mm depending on setup and application needs, offering a practical solution for HVAC, electrical and plumbing penetrations where wide bore openings are required.

Advantages

The bi-metal construction combines a high-speed steel cutting edge and a flexible backing steel body to provide a balance of cutting performance and resistance to breakage. Its tooth geometry is optimized for cutting through wood, plasterboard, plastic and thin metal sheets, delivering clean edges and reducing the need for secondary finishing. Compatibility with common arbors and quick-change systems simplifies attachment to handheld drills and drill presses, while the large diameter options cover standard openings used in building services.

Suitable for

• Creating ducts and ventilation openings in walls and ceilings
• Installing large junction boxes and service access panels
• Drilling passage holes for pipes and conduit in HVAC and plumbing work
• Making large cable entry points for electrical installations

Key specifications

• Cutting material: bi-metal cutting edge bonded to alloy steel body
• Available hole diameters: nominal 200 mm and 212 mm (depending on arbor and setup)
• Compatible drive: standard drill arbor compatibility for handheld drills and drill presses
• Recommended materials: wood, plasterboard, plastics, thin sheet metal
• Design: full-circumference tooth pattern for large-diameter cutting

How to use

Select the appropriate arbor and secure the Glob Premium in situ hole saw to the drill according to the arbor manufacturer's instructions. Mark the center point of the hole and, if possible, start with a pilot bit or guide to maintain alignment. Operate the drill at moderate speed, applying steady pressure and allowing the saw to do the cutting; avoid excessive force which may overheat the teeth. For through-cuts in thin materials, support the workpiece to prevent tear-out and remove cut material periodically to maintain chip clearance. After cutting, deburr the hole edges if required for the specific installation.

Usage recommendations

Use appropriate personal protective equipment including eye protection and gloves. Match cutting speed and feed to the material being cut — lower speeds for metals, higher speeds for wood and plastics. For repeated or heavy-duty use, inspect the teeth regularly and replace the hole saw when wear reduces cutting efficiency. Use coolant or periodic breaks when cutting metal to extend tool life.