Product Description
The CMT 551-022X Bi-Metal Plus Hole Saw - 7/8" (22mm) is a professional-grade hole cutting tool engineered for demanding metalworking and fabrication tasks. Built with an 8% Cobalt bi-metal (BIM) construction, this hole saw delivers extended cutting life and reliable performance when boring through steel, stainless steel, cast iron, aluminum, copper, brass, and plastics. The 45mm cutting depth accommodates a wide range of material thicknesses, making it a practical choice for electricians, plumbers, metalworkers, and contractors who need a dependable 22mm hole saw for both light and heavy-duty drilling applications.
Key Features
- Bi-Metal 8% Cobalt (BIM) Construction - The high-cobalt tooth alloy provides superior hardness and heat resistance, translating to longer cutting life compared to standard bi-metal hole saws - especially when working through stainless steel and other hardened metals.
- 7/8" (22mm) Cutting Diameter - A precise 22mm bore size suited for conduit knockouts, pipe penetrations, and hardware installations that call for an exact 7/8 inch hole.
- 45mm Cutting Depth - A deep 45mm capacity lets this saw cut through thicker materials and stacked workpieces without repositioning, improving efficiency on the job site or in the shop.
- Right-Hand (RH) Rotation - Optimized for use with standard right-hand rotation drills, compatible with both cordless and corded drill drivers as well as drill presses.
- Hexagonal Shank - The hex shank design resists slipping in the chuck and ensures secure engagement, reducing the risk of the saw spinning loose during heavy cuts in metal or cast iron.
- BIM Material Versatility - The bi-metal composition handles a broad range of materials - steel, stainless steel, cast iron, aluminum, copper, brass, and plastics - making it a single-tool solution for multi-material job sites.
Why This Product
- The 8% Cobalt bi-metal construction makes this hole saw a reliable choice for cutting stainless steel and hardened metals where standard hole saws wear out prematurely - reducing tool changes and downtime on demanding jobs.
- At 7/8" (22mm), this is a commonly required diameter for conduit fittings, pipe installations, and hardware pass-throughs, giving tradespeople a purpose-matched tool rather than a compromise size.
- The 45mm cutting depth means the saw can handle thick panel stock, metal enclosures, and layered materials in a single pass, avoiding the need to flip or reposition the workpiece.
- The hexagonal shank and right-hand rotation design ensure compatibility with standard cordless drills, corded drills, and drill presses already on site - no specialized equipment required.
Specifications
- Manufacturer Part Number: 551-022X
- Brand: CMT Orange Tools
- Diameter: 7/8" (22mm)
- Cutting Depth: 45mm
- 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 551-022X cut through?
This hole saw is designed to cut steel, stainless steel, cast iron, aluminum, copper, brass, and plastics. The 8% Cobalt bi-metal construction gives it the hardness and heat resistance needed to work through tough metals like stainless steel and cast iron without premature dulling.
What is the cutting depth of this hole saw?
The CMT 551-022X has a cutting depth of 45mm, allowing it to bore through thicker materials and multi-layer workpieces in a single pass without needing to reposition.
What type of shank does this hole saw use?
It features a hexagonal shank, which locks securely in standard drill chucks to prevent slipping during heavy cutting operations - particularly useful when working through dense metals.
What drilling equipment is compatible with this hole saw?
The CMT 551-022X is compatible with cordless drills, corded drills, and drill presses. It uses right-hand rotation, which matches the standard rotation direction of all common drill types.
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FAQs
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