Shark Industries BT21 Carbide Rotary Bur Ball-Nosed Cylinder 3/8" x 3/4"

The Shark Industries BT21 is a professional-grade carbide rotary bur featuring a ball-nosed cylinder profile with brazed head construction. This precision grinding tool is designed for aggressive material removal and shaping applications in metalworking, die grinding, and fabrication.

Key Specifications:

• Head diameter: 3/8 inch
• Head length: 3/4 inch
• Overall length: 2-1/2 inches
• Brazed carbide head construction for superior durability
• Ball-nosed cylinder shape for contour work and radius profiles
• Double-cut flute pattern for smooth, controlled material removal
• 1/4 inch shank diameter (standard for die grinders and rotary tools)

Applications:

• Deburring, grinding, and shaping hardened steel, cast iron, and non-ferrous metals
• Porting and polishing cylinder heads and manifolds
• Weld preparation and cleanup
• Creating radiused edges and contoured surfaces
• Mold and die work

The ball-nosed cylinder design combines the side-cutting capability of a cylindrical bur with the contouring ability of a ball bur, making it ideal for blending transitions and creating smooth radius profiles. Brazed head construction provides maximum strength and heat resistance for demanding professional applications.