CMT 550-185X Multi-Purpose TCT Hole Saw is a 7-5/16" (185mm) diameter carbide-tipped hole saw engineered for versatile cutting across a wide range of construction and finishing materials. Built with hardmetal (HW) carbide teeth and a right-hand rotation design, this 185mm hole saw delivers clean, accurate bores in wood, sheet goods, mastics, and masonry-type substrates - making it a go-to tool for contractors, installers, and tradespeople who need reliable performance in demanding job site conditions.

Key Features

• 7-5/16" (185mm) Cutting Diameter - sized for large-format hole cutting such as recessed lighting rough-ins, plumbing pass-throughs, and HVAC penetrations where precision diameter matters.
• Hardmetal (HW) Carbide Teeth - TCT construction provides significantly greater tooth hardness and heat resistance compared to bi-metal blades, translating to longer tool life when cutting abrasive materials like laminates, plasterboard, and aerated concrete.
• 8-Tooth Gullet Configuration - 8 evenly spaced carbide teeth promote aggressive yet controlled material removal, reducing heat buildup and minimizing tear-out for cleaner hole edges.
• 60mm Cutting Depth - accommodates thicker stock, stacked panels, wall assemblies, and multi-layer substrates in a single pass without repositioning.
• Hexagonal Shank - positive engagement in drill chucks prevents slipping under load, maintaining concentricity and reducing operator fatigue on extended cuts.
• Right-Hand Rotation - compatible with standard corded and cordless drills as well as drill presses, ensuring broad machine compatibility without adapters or special tooling.
• Multi-Purpose TCT Design - cuts wood, plywood, MDF, laminates, plasterboard, plastics, bricks, aerated concrete, and soft tiles with a single tool, reducing the number of specialized cutters needed on site.

Why This Product

• The 185mm carbide-tipped cutting edge handles a broader range of construction substrates - from soft wood panels to aerated concrete blocks - without swapping tools, making it practical for multi-trade installers who move between material types throughout the day.
• A 60mm cutting depth allows this hole saw to bore through thicker composite wall assemblies and stacked sheet materials in a single setup, saving time and reducing the risk of misaligned re-entries.
• The hexagonal shank provides a secure, non-slip grip inside standard drill chucks, reducing the vibration and wobble that cause oversized or irregular holes - critical when dimensional accuracy is required for fittings, grommets, or fixture mounting.
• With 8 carbide teeth optimized for multi-material cutting, this TCT hole saw remains a practical choice for professionals who need consistent hole quality across diverse job site materials without frequent blade changes.

Specifications

• Manufacturer Part Number: 550-185X
• Brand: CMT Orange Tools
• Diameter: 7-5/16" (185mm)
• Cutting Depth: 60mm
• Number of Teeth: 8
• Blade Material: HW (Hardmetal Carbide)
• Shank Type: Hexagonal
• Rotation: Right-Hand (RH)

Approved Applications

• Hole cutting in wood and plywood
• Hole cutting in MDF and laminates
• Hole cutting in plasterboard and drywall assemblies
• Hole cutting in plastics and composite panels
• Hole cutting in bricks and aerated concrete
• Hole cutting in soft tiles