The CMT 551-086X Bi-Metal Plus Hole Saw delivers a 3-3/8" (86mm) cutting diameter built for demanding metalworking and construction applications. Engineered with 8% Cobalt bi-metal (BIM) construction, this hole saw is designed to cut through stainless steel, steel, cast iron, aluminum, copper, brass, and plastics with extended tool life compared to standard hole saws. The CMT Series 551X features the XTREME FAST Push and Lock system, allowing tool-free bit changes in seconds - a genuine productivity advantage when cycling through multiple hole sizes on the job site or in the shop. With right-hand rotation and a hexagonal shank interface, this 86mm hole saw fits seamlessly into cordless drills, corded drills, and drill presses.

Key Features

• Bi-Metal 8% Cobalt (BIM) Construction - the 8% Cobalt content in the bi-metal teeth provides 2x longer cutting life than standard hole saws, meaning fewer tool changes and lower cost per hole when cutting stainless steel and hardened steel.
• 3-3/8" (86mm) Cutting Diameter - precision-sized for consistent, clean holes in a wide range of materials including steel, cast iron, aluminum, copper, brass, and plastics, eliminating the need for secondary finishing on properly supported workpieces.
• 45mm Cutting Depth - sufficient cutting depth for penetrating standard structural materials and pipe walls without needing to reposition or flip the workpiece.
• XTREME FAST Push and Lock System - tool-free hole saw changes in under 3 seconds reduce downtime and improve workflow efficiency when swapping between sizes during multi-hole jobs.
• Variable 4-6 TPI Alternate and Side-Set Teeth - the variable tooth pitch reduces vibration and chatter across different material thicknesses, delivering smoother cuts and longer tooth life on both thin sheet and thicker stock.
• Hexagonal Shank Interface - the hexagonal shank design ensures positive drive engagement in compatible arbors, preventing slippage under load during aggressive cutting in hard metals.
• Right-Hand Rotation - standard RH rotation is compatible with the vast majority of corded and cordless drills and drill presses, requiring no special tooling or adapter configuration.
• Compatible with Push and Lock Arbors 550-PH85 and 550-PH11 - works with both the 11/32" hex and 7/16" hex Push and Lock arbors, giving flexibility across different drill chuck sizes.

Why This Product

• Professionals cutting stainless steel or hardened steel regularly benefit from the 8% Cobalt BIM construction - it directly extends cutting life so you spend less time changing tools and more time completing work.
• The XTREME FAST Push and Lock system eliminates the need for wrenches or set screws when swapping hole saw sizes, a practical advantage on job sites where speed and simplicity matter.
• At 3-3/8" (86mm) with a 45mm cutting depth, this hole saw covers a broad range of real-world applications - from conduit and plumbing rough-in to fabrication work in aluminum and non-ferrous metals.
• The variable 4-6 TPI tooth geometry handles multiple material types without switching tools, making this bi-metal hole saw a versatile choice for trades professionals working across steel, cast iron, and plastics in a single session.

Specifications

• Manufacturer Part Number: 551-086X
• Brand: CMT Orange Tools
• Diameter: 3-3/8" (86mm)
• Cutting Depth: 45mm
• 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" hex) and 550-PH11 (7/16" 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