Monster Tool Rotary Burr 310-002089C SD-1 1/4 Inch (1/4 Inch Shank Solid Carbide Ball Shape Double Cut 35000 Max RPM Weld Grinding Pipe Hollowing)

Monster Tool 310-002089C SD-1 1/4-Inch Ball Shape Solid Carbide Rotary Burr

The Monster Tool 310-002089C SD-1 1/4-Inch Ball Shape Solid Carbide Rotary Burr is a rotary grinding and hollowing bit engineered for carving spherical recesses, machining concave profiles, deburring pipe interiors, and blending internal radii in metal fabrications. Rated for operational speeds up to 35,000 RPM on a standard 1/4-inch shank, this C-2 grade sub-micron solid carbide bit features a spherical ball 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 7/32-inch length of cut across a 2-inch overall length, this 0.12-pound rotary tool accessory executes precision metal removal.

Best Used For:

• Internal Pipe & Hole Deburring: Removing sharp internal burrs and slag from drilled holes and pipe cutouts without binding.
• Concave Profile & Spherical Pocket Carving: Machining smooth spherical depressions, concave radii, and ball sockets in metal dies.
• Weld Seam Blending & Radius Finishing: Blending interior curved weld beads flush in restricted iron and steel assemblies.

Key Performance & Safety Features

• C-2 Grade Sub-Micron Solid Carbide: Formulated with 8-10% cobalt to maintain cutting edge hardness under intense frictional heat.
• Spherical Ball (SD-1) Head Profile: Ball shape geometry permits multi-directional hollowing and smooth concave surface profiling.
• Double-Cut Cross-Flute Design: Opposing cutting flutes produce granular metal chips to minimize tool chatter and deliver smooth surface finishes.
• 35,000 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) Monster Tool 310-002089C SD-1 1/4-Inch Double Cut Ball Shape Solid Carbide Burr

Technical Specifications

Pro-Tip: Maintain high die grinder rotational speeds near 35,000 RPM while using continuous circular sweeps; light pressure allows the spherical ball flutes to carve smooth concave radii without digging or stalling.