Product Description
The CMT 551-057X Bi-Metal Plus Hole Saw delivers a 2-1/4" (57mm) cutting diameter with a robust 8% Cobalt bi-metal construction, engineered for demanding hole-cutting tasks in metal, stainless steel, cast iron, aluminum, copper, brass, and plastics. Designed for right-hand rotation and compatible with hexagonal arbor systems, this professional-grade hole saw is built to tackle the toughest materials on the job site with extended tool life and reliable, consistent performance.
Key Features
- Bi-Metal 8% Cobalt (BIM) Construction - the elevated cobalt content in the cutting teeth provides 2x longer cutting life compared to standard hole saws, meaning fewer tool changes and lower cost per hole on steel and stainless steel applications.
- 2-1/4" (57mm) Cutting Diameter - a precise, consistent bore size suited for electrical, plumbing, and mechanical trade work where accurate hole sizing is critical.
- 45mm Cutting Depth - deep enough to cut through typical structural materials, wall assemblies, and multi-layer panels in a single pass without repositioning.
- Right-Hand Rotation - matches the standard drive direction of corded drills, cordless drills, and drill presses, ensuring immediate compatibility with common job-site power tools.
- Hexagonal Shank Interface - the hexagonal shank provides a secure, positive engagement with compatible arbors, reducing slippage under load for cleaner cuts and improved operator control.
- Broad Material Compatibility - cuts stainless steel, steel, cast iron, aluminum, copper, brass, and plastics, reducing the number of specialized cutters needed across multi-material projects.
Why This Product
- The 8% Cobalt bi-metal build is specifically suited for stainless steel and hardened steel cutting where standard bi-metal saws wear prematurely - a practical advantage for HVAC, plumbing, and mechanical contractors who cut through tough metals regularly.
- At 45mm cutting depth, this hole saw handles real-world material thicknesses encountered in structural and finish work without requiring multiple setups or specialty extensions.
- The hexagonal shank design ensures the saw seats firmly in compatible arbors, which directly reduces cam-out and vibration during high-torque cutting operations.
- A single 2-1/4" (57mm) hole saw that performs across steel, cast iron, aluminum, non-ferrous metals, and plastics simplifies the tool kit for tradespeople who work across multiple material types on the same job.
Specifications
- Manufacturer Part Number: 551-057X
- Brand: CMT Orange Tools
- Diameter: 2-1/4" (57mm)
- Cutting Depth: 45mm
- Blade Material: Bi-Metal (BIM) 8% Cobalt
- Rotation: Right-Hand (RH)
- Shank: Hexagonal
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
Frequently Asked Questions
What materials can the CMT 551-057X Bi-Metal Plus Hole Saw cut?
This hole saw is designed to cut stainless steel, steel, cast iron, aluminum, copper, brass, and plastics. The 8% Cobalt bi-metal construction provides the hardness and heat resistance needed for these demanding materials, including the harder grades of stainless steel.
What is the cutting depth of this hole saw?
The CMT 551-057X has a cutting depth of 45mm, making it well-suited for cutting through typical structural panels, wall assemblies, and multi-layer materials in a single pass.
What type of shank does this hole saw use?
This hole saw features a hexagonal shank, which provides a secure, positive connection to compatible arbors and helps prevent slippage during high-torque cutting operations.
Is this hole saw compatible with standard corded and cordless drills?
Yes. The CMT 551-057X is designed for right-hand rotation and a hexagonal shank interface, making it compatible with standard corded drills, cordless drills, and drill presses that accept a compatible arbor.
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FAQs
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