24000 Series M2 HSS Annular Cutter — Reliable Performance for Mild Steel and Softer Metals
The 24000 Series M2 HSS Annular Cutter is produced from high-quality M2 High Speed Steel and is engineered for general cutting of mild steel and softer metals. Designed for use with a magnetic drill via its Weldon shank, this cutter delivers an excellent balance of performance and value for contractors and trades professionals. Available in diameters ranging from 7/16" to 2" and in 1" or 2" depths of cut, it suits a wide range of structural and fabrication drilling tasks. Each cutter is manufactured in England and includes a pilot pin for accurate hole positioning.
Technical Specifications
| Specification | Details |
|---|---|
| Material | M2 High Speed Steel (HSS) |
| Depth of Cut | 1" or 2" |
| Diameter Range | 7/16" to 2" |
| Shank Type | Weldon shank |
| Pilot Pin | Included |
| Country of Manufacture | Made in England |
| Primary Application | General cutting of mild steel and softer metals |
| Availability | Available as individuals and in kits |
The 24000 Series distinguishes itself through Unibor's custom cutter geometry, which is engineered to optimize chip evacuation and cutting efficiency on mild steel and softer materials. Compared to standard twist drill bits, annular cutters remove only a core of material rather than the full slug, reducing the power required and extending tool life. The Made in England manufacturing standard reflects consistent quality control across the product range.
Key Features & Benefits
M2 High Speed Steel Construction
M2 HSS provides the hardness and wear resistance needed for repetitive drilling in mild steel and softer metals. This material grade offers a strong balance of toughness and cutting performance, making it a cost-effective choice for general fabrication and structural work.
Custom Unibor Geometry
Each cutter features Unibor's proprietary geometry, designed to optimize cutting action and chip clearance during operation. This geometry helps maintain consistent hole quality and reduces heat buildup during extended use.
Weldon Shank for Magnetic Drill Compatibility
The Weldon shank design ensures a secure, positive connection with magnetic drill chucks, preventing slippage under load. This makes the cutter suitable for on-site structural drilling where a magnetic drill is the standard tool of choice.
Included Pilot Pin
A pilot pin is included with each cutter, enabling accurate hole placement before cutting begins. This reduces the need for center-punching and helps maintain positional accuracy on flat and curved workpieces.
Wide Diameter and Depth Range
With diameters from 7/16" to 2" and depth-of-cut options of 1" or 2", the 24000 Series covers a broad range of hole sizes for structural steel, plate, and fabrication applications. Contractors can select the exact size needed rather than compromising with a close alternative.
Available as Individuals and in Kits
The flexibility to purchase individual cutters or complete kits allows contractors to stock exactly what their projects require. Kit availability is particularly useful for crews that need a range of sizes on hand for varied drilling tasks.
Common Applications
Structural Steel Fabrication
Drilling clean, accurate holes in mild steel beams, columns, and plates for bolted connections and structural assemblies.
Steel Plate Drilling
Creating precise holes in flat steel plate for brackets, flanges, and mechanical attachments where hole quality and dimensional accuracy are critical.
General Metal Fabrication
Suitable for shop and field fabrication tasks involving mild steel and softer metals where a magnetic drill is used.
On-Site Construction Drilling
The Weldon shank and magnetic drill compatibility make this cutter well suited for on-site structural work where portability and speed are priorities.
Compatible Materials
- Mild steel
- Softer metals