Product Description
The CMT 551-054X Bi-Metal Plus Hole Saw is a 2-1/8 in. (54mm) diameter cutting tool engineered for demanding metal cutting applications. Built with an 8% Cobalt bi-metal construction, this hole saw delivers twice the cutting life of standard hole saws, making it a reliable choice for professionals cutting stainless steel, steel, cast iron, aluminum, copper, brass, and plastics. The variable 4-6 TPI tooth pattern with alternate and side-set geometry reduces vibration and produces cleaner cuts across a broad range of materials. Featuring the XTREME FAST Push and Lock system, it mounts and releases in under 3 seconds without tools, keeping work moving on jobsites where efficiency matters.
Key Features
- 8% Cobalt Bi-Metal (BIM) Construction - delivers 2x longer cutting life compared to standard hole saws, reducing tool changeovers and lowering cost per hole on demanding metal cutting jobs.
- Variable 4-6 TPI Tooth Pattern - alternate and side-set tooth geometry minimizes vibration, reduces heat buildup, and produces smoother cuts through steel, cast iron, aluminum, and plastics.
- XTREME FAST Push and Lock System - allows tool-free saw changes in under 3 seconds, eliminating downtime between cuts and improving productivity on high-volume drilling tasks.
- 2-1/8 in. (54mm) Cutting Diameter - sized precisely for conduit knockout, pipe fitting, and similar penetration work in metal panels, enclosures, and structural materials.
- 45mm Cutting Depth - sufficient depth for working through sheet metal, structural steel, and layered materials in a single pass without repositioning.
- Right-Hand (RH) Rotation - compatible with standard corded and cordless drills and drill presses, making it a straightforward drop-in upgrade for existing tool setups.
- Hexagonal Shank - pairs with Push and Lock arbors (550-PH85 and 550-PH11) for a secure, wobble-free connection that maintains accuracy during high-speed cutting.
Why This Product
- Professionals cutting stainless steel or hardened steel need a hole saw that holds an edge longer - the 8% Cobalt bi-metal construction provides that extended durability, cutting the number of saw replacements required on a job.
- The XTREME FAST Push and Lock mounting system eliminates the frustration of threaded arbor changes, making it practical to switch between hole saw sizes quickly when drilling multiple hole diameters in one session.
- With compatibility across steel, cast iron, aluminum, copper, brass, and plastics, this single hole saw handles the full range of materials found in electrical, plumbing, and mechanical installations - reducing the number of specialty tools needed.
- At 2-1/8 in. diameter with a 45mm cutting depth, this saw is appropriately sized for conduit, pipe, and knockout work where precise hole dimensions are critical to fitting acceptance and code compliance.
Specifications
- Manufacturer Part Number: 551-054X
- Brand: CMT Orange Tools
- Diameter: 2-1/8 in. (54mm)
- Cutting Depth: 45mm
- Blade Material: Bi-Metal (BIM) 8% Cobalt
- Tooth Pitch: Variable 4-6 TPI (alternate and side-set)
- Rotation: Right-Hand (RH)
- Shank: Hexagonal
- System: XTREME FAST Push and Lock
- Arbor Compatibility: 550-PH85 (11/32 in. hex) and 550-PH11 (7/16 in. hex) Push and Lock arbors
- 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
Frequently Asked Questions
What materials can the CMT 551-054X cut?
This hole saw is rated for cutting stainless steel, steel, cast iron, aluminum, copper, brass, and plastics. The 8% Cobalt bi-metal construction is specifically suited for harder ferrous metals including stainless and hardened steel where standard bi-metal saws wear prematurely.
What arbors are compatible with this hole saw?
The 551-054X uses the XTREME FAST Push and Lock mounting system and is compatible with CMT arbors 550-PH85 (11/32 in. hex shank) and 550-PH11 (7/16 in. hex shank). These Push and Lock arbors allow tool-free saw changes in under 3 seconds.
What is the cutting depth of this 2-1/8 in. hole saw?
The cutting depth is 45mm, which is adequate for most metal panel, sheet steel, and structural material penetrations encountered in electrical, plumbing, and mechanical installations.
Can this hole saw be used with a standard cordless drill?
Yes. The 551-054X has a right-hand (RH) rotation and a hexagonal shank, making it compatible with standard corded drills, cordless drills, and drill presses when paired with the appropriate Push and Lock arbor.
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