UCT Gem Carbide Rotary Burr SB-5 1/2 Inch (1/4 Inch Shank Tungsten Carbide Cylindrical Radius End Double Cut 20000 Max RPM Weld Grinding)

UCT Gem Carbide SB-5 1/2-Inch Cylindrical Radius End Carbide Rotary Burr

The UCT Gem Carbide SB-5 1/2-Inch Cylindrical Radius End Carbide Rotary Burr is a rotary grinding and contouring bit engineered for blending heavy fillet welds, shaping internal radiused corners, deburring steel fabrications, and porting cylinder heads without gouging workpiece sidewalls. Rated for operational speeds up to 20,000 RPM on a standard 1/4-inch steel shank, this tungsten carbide head bit features a ball-nose cylindrical profile and double-cut cross-flute geometry that breaks material into fine chips to eliminate chatter. Outfitted with a 1/2-inch head diameter and a 1-inch length of cut across a 2-3/4-inch overall length, this 0.25-pound rotary tool accessory executes high-speed metal removal.

Best Used For:

• Fillet Weld Blending & Contour Finishing: Smoothing thick curved weld seams flush on structural steel plates without digging sharp gouges into adjacent metal.
• Internal Radius Pocket & Groove Shaping: Machining rounded bottom channels, internal keyways, and radiused contours in cast iron and steel components.
• Engine Head & Intake Manifold Porting: Enlarging, shaping, and smoothing curved internal runner channels in automotive cylinder heads.

Key Performance & Safety Features

• Tungsten Carbide Cutting Head: High-density carbide composition maintains cutting edge hardness under intense frictional heat during heavy grinding.
• Cylindrical Radius End (Ball Nose) Profile: Radius end geometry prevents gouging when working inside rounded 90-degree corners and internal fillets.
• Double-Cut Cross-Flute Design: Opposing cutting flutes produce granular metal chips to minimize tool chatter and deliver smooth surface finishes.
• 20,000 Maximum RPM Speed Rating: Precision-balanced construction accommodates pneumatic and electric 1/4-inch die grinders at full operating speed.
• Hardened 1/4-Inch Steel Shank: Precision-ground steel shank mounts securely into standard 1/4-inch collets to eliminate rotational runout.
• Multi-Metal Substrate Compatibility: Cuts efficiently through structural steel, cast iron, stainless steel, brass, bronze, and aluminum alloys.

What's Included

• (1) UCT Gem Carbide SB-5 1/2-Inch Double Cut Cylindrical Radius End Solid Carbide Burr

Technical Specifications

Pro-Tip: Maintain a light, continuous feeding motion at high speeds near 20,000 RPM when grinding internal fillets; applying excessive downward pressure reduces cutting speed and accelerates carbide tooth wear on hard steel stock.