The CMT 551-032X Bi-Metal Plus Hole Saw delivers professional-grade hole cutting at 1-1/4 in. (32mm) diameter, built for demanding applications in steel, stainless steel, cast iron, aluminum, copper, brass, and plastics. Constructed from 8% Cobalt bi-metal (BIM) material, this hole saw is engineered to provide twice the cutting life of standard hole saws - making it the right choice for tradespeople and contractors who need reliable, long-lasting performance on tough metals. The right-hand rotation design and hexagonal shank work with the XTREME FAST Push and Lock system, allowing tool-free blade changes in seconds and keeping productivity high on the job site.

Key Features

• 8% Cobalt Bi-Metal (BIM) Construction - delivers 2x longer cutting life compared to standard hole saws, reducing blade replacement frequency and lowering cost per hole on steel, stainless steel, and cast iron applications.
• 1-1/4 in. (32mm) Cutting Diameter - sized for common trade applications requiring precise, clean holes in metal, plastic, and non-ferrous materials.
• 45mm Cutting Depth - accommodates thicker stock and layered materials in a single pass, reducing the need for multiple setups.
• Hexagonal Shank - provides a secure, slip-resistant connection to arbors and drill chucks, maintaining alignment and reducing vibration during cutting.
• Right-Hand Rotation - compatible with standard corded drills, cordless drills, and drill presses for versatile machine use.
• XTREME FAST Push and Lock System - enables tool-free hole saw changes in under 3 seconds, minimizing downtime and keeping multi-diameter jobs moving efficiently.
• Variable Pitch Teeth (4-6 TPI with Alternate and Side-Set - reduces vibration and material loading, producing smoother cuts and extending tooth life across a range of material thicknesses.
• Compatible with Push and Lock Arbors (550-PH85 and 550-PH11) - integrates directly into the CMT 551X system for fast, reliable hole saw management across multiple sizes.

Why This Product

• The 8% Cobalt BIM construction makes this hole saw a practical upgrade for anyone regularly cutting stainless steel or hardened steel - materials that rapidly wear down standard bi-metal blades - by doubling the usable cutting life.
• The XTREME FAST Push and Lock system solves one of the most time-consuming problems with hole saw work: slow, tool-dependent blade swaps. Changing to a different diameter takes less than 3 seconds, which matters when working through multiple hole sizes on a single project.
• At 45mm cutting depth, this saw handles thicker materials and stacked workpieces that shallower hole saws cannot reach in one pass - reducing repositioning and improving cut-through efficiency.
• The variable pitch tooth geometry (4-6 TPI) addresses the challenge of cutting different material thicknesses with a single blade, smoothing the cut and reducing the risk of tooth stripping on thin stock while still clearing chips effectively in thicker material.

Specifications

• Manufacturer Part Number: 551-032X
• Brand: CMT Orange Tools
• Diameter: 1-1/4 in. (32mm)
• Cutting Depth: 45mm
• Material: Bi-Metal (BIM) 8% Cobalt
• Tooth Pitch: Variable 4-6 TPI (alternate and side-set)
• Shank: Hexagonal
• Rotation: Right-Hand (RH)
• System: XTREME FAST Push and Lock
• Compatible Arbors: 550-PH85 (11/32 in. hex) and 550-PH11 (7/16 in. hex) Push and Lock arbors
• Country of Origin: 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