Allegiance Rotary Burr SL-1 1/4 Inch (1/4 Inch Shank Solid Tungsten Carbide Tapered Radius End Double Cut 30000 Max RPM Weld Grinding)

Allegiance SL-1 1/4-Inch Tapered Radius End Solid Carbide Rotary Burr

The Allegiance SL-1 1/4-Inch Tapered Radius End Solid Carbide Rotary Burr is a specialized rotary grinding and deburring bit engineered for machining tapered slots, finishing angled contours, blending internal radiused weld seams, and dressing narrow grooves without gouging sidewalls. Rated for operational speeds up to 30,000 RPM on a standard 1/4-inch shank, this solid tungsten carbide bit features a tapered ball-nose head profile and double-cut cross-flute geometry that breaks material into fine chips to eliminate chatter. Outfitted with a 1/4-inch head diameter and a 5/8-inch length of cut across a 2-inch overall length, this 0.12-pound rotary tool accessory executes precision metal removal.

Best Used For:

• Tapered Slot & Narrow Groove Grinding: Machining angled slots and internal tapered channels in die molds and steel fabrications.
• Fillet Weld Blending & Contour Finishing: Smoothing curved internal weld seams flush without gouging adjacent metal sidewalls.
• Engine Cylinder Head & Porting Modifications: Shaping and deburring narrow internal runner transitions and curved port walls in automotive cylinder heads.

Key Performance & Safety Features

• Solid Tungsten Carbide Construction: Single-piece carbide formulation maintains cutting edge hardness under intense frictional heat.
• Tapered Radius End (SL-1) Head Profile: Ball-nose cone geometry provides smooth clearance in angled grooves and rounded fillets without gouging.
• Double-Cut Cross-Flute Design: Opposing cutting flutes produce granular metal chips to minimize tool chatter and deliver smooth surface finishes.
• 30,000 Maximum RPM Speed Rating: Precision-balanced construction accommodates pneumatic and electric 1/4-inch die grinders at full operating speed.
• Standard 1/4-Inch Steel Shank: Precision-ground shank inserts 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.

What's Included

• (1) Allegiance SL-1 1/4" Double Cut Tapered Radius End Solid Carbide Burr

Technical Specifications

Pro-Tip: Guide the tapered ball-nose tip smoothly through narrow angled slots without jamming; maintaining steady die grinder speeds near 30,000 RPM with light pressure prevents tooth chipping and ensures even stock removal.