The CMT 551-030X Bi-Metal Plus Hole Saw is a 1-3/16 in. (30mm) diameter cutting tool engineered for demanding hole-cutting tasks in metal, cast iron, non-ferrous materials, and plastics. Built with an 8% Cobalt bi-metal (BIM) construction, this hole saw delivers significantly longer service life compared to standard bi-metal hole saws - making it a reliable choice for professionals who cut stainless steel, hardened steel, aluminum, copper, brass, and plastic regularly. The right-hand rotation design and hexagonal shank ensure secure, stable engagement in cordless drills, corded drills, and drill presses alike.

Key Features

• 8% Cobalt Bi-Metal (BIM) Construction - the elevated cobalt content in the tooth alloy provides 2x longer cutting life than standard hole saws, reducing replacement frequency and downtime on the job.
• 1-3/16 in. (30mm) Diameter - a precise, consistent bore size that matches common conduit, pipe, and hardware knockout requirements in metalworking and electrical applications.
• 45mm Cutting Depth - deep enough to cut through thick steel plate, structural sections, and stacked material without needing to reposition or make multiple passes.
• Hexagonal Shank - the hex shank design locks securely into compatible arbors and drill chucks, preventing slippage under torque and maintaining cutting accuracy.
• Right-Hand Rotation - optimized for use with standard right-hand drill tools, ensuring compatibility with the widest range of cordless and corded drilling equipment.
• XTREME FAST Push and Lock System Compatibility - engineered for use with the Push and Lock arbor system, allowing blade changes in under 3 seconds with no tools required, which keeps workflow moving efficiently.
• Variable Pitch Teeth (4-6 TPI, Alternate and Side-Set) - the variable tooth pitch reduces vibration and chatter while improving chip evacuation, resulting in smoother cuts and extended blade life across a range of material thicknesses.

Why This Product

• Engineered for hard metals - the 8% Cobalt BIM teeth are specifically formulated to withstand the heat and abrasion generated when cutting stainless steel, cast iron, and hardened steel, where standard hole saws wear out prematurely.
• Handles a wide range of materials in one tool - from stainless steel and cast iron to aluminum, copper, brass, and plastics, this single hole saw covers the full spectrum of common metalworking and fabrication applications.
• Fast arbor changes minimize downtime - compatibility with the XTREME FAST Push and Lock system means switching between hole saw sizes takes seconds, not minutes, which matters when productivity is on the line.
• Consistent 30mm bore with 45mm depth capacity - the combination of precise diameter and generous cutting depth makes this hole saw suited for through-cuts in thick structural materials that shallower tools cannot complete in a single pass.

Specifications

• Manufacturer Part Number: 551-030X
• Brand: CMT Orange Tools
• Diameter: 1-3/16 in. (30mm)
• Cutting Depth: 45mm
• Blade Material: Bi-Metal (BIM) 8% Cobalt
• Tooth Pitch: Variable 4-6 TPI (alternate and side-set)
• Shank: Hexagonal
• Rotation: Right-Hand (RH)
• Arbor Compatibility: 550-PH85 (11/32 in. hex) and 550-PH11 (7/16 in. hex) Push and Lock arbors
• System: XTREME FAST Push and Lock
• Country of Origin: Made in Italy

Approved Applications

• Hole cutting in steel and stainless steel
• Hole cutting in cast iron
• Hole cutting in aluminum and non-ferrous metals
• Hole cutting in copper and brass
• Hole cutting in plastics