05F221 - Walter 21mm Carbide Annular Cutter 55mm Depth

High-Performance Industrial Drilling with Walter Carbide Core Cut

The Walter 05F221 21mm x 55mm Carbide Core Cut Annular Cutter represents the pinnacle of drilling technology for industrial applications involving hard and abrasive metals. Engineered by Walter Surface Technologies, this cutter is specifically designed to overcome the limitations of traditional High-Speed Steel (HSS) bits when facing tough materials such as stainless steel, cast iron, and resilient alloys. By utilizing premium tungsten carbide inserts, the 05F221 delivers a cutting performance that is not only faster but also significantly more durable, ensuring a lower cost per hole in high-volume production environments.

One of the standout features of this 21mm cutter is its sophisticated flute geometry. The design promotes rapid chip evacuation, which is critical when drilling deep holes up to 55mm. Efficient chip removal prevents heat buildup—the primary enemy of tool life—allowing the cutter to maintain its hardness and cutting edge even under thermal stress. This makes it an indispensable tool for fabrication shops, heavy machinery maintenance, and structural steelworks where downtime for tool changes must be minimized. The carbide tips are brazed with precision to withstand the high torque and shock loads often encountered during heavy-duty drilling operations.

Furthermore, the Walter Carbide Core Cut series is optimized for use with magnetic drilling units, providing stability and precision on flat or curved surfaces. Whether you are drilling into a thick plate of 304 stainless steel or working on a cast iron engine block, this cutter requires less feed pressure than standard bits, reducing operator fatigue and machine wear. The 55mm depth of cut offers versatility for various material thicknesses, making it a comprehensive solution for complex industrial drilling tasks.

Key Industrial Benefits

• Extended Tool Life: Carbide tips resist wear and heat, lasting significantly longer than HSS in hard metals.
• Precision Sizing: Delivers a true 21mm diameter hole with excellent surface finish, often eliminating the need for reaming.
• Deep Hole Capability: The 55mm depth capacity allows for single-pass drilling through thick structural components.
• Material Versatility: effectively drills stainless steel, cast iron, hard alloys, and carbon steel.