Grewin Jin Niu L-Type Rotary Burr — The High-Efficiency Powerhouse

Product Overview

The Grewin Jin Niu L-Type rotary burr features a unique tree-shaped cutting profile, resembling the longitudinal cross-section of a tree: thickest at the center and symmetrically tapered towards both sides. Its cutting edges are formed by two sets of opposite-direction arc grooves intersecting, creating a distinctive wavy mesh pattern.
This special arc-tooth design provides lower cutting resistance, larger chip space, and is especially suitable for heavy stock removal. Its material removal efficiency far exceeds that of conventional rotary burrs, earning it the name “High-Efficiency Powerhouse” among rotary burrs.

Key Features

• Premium Material: Made of tungsten carbide, extremely hard, wear-resistant, and impact-resistant, with long service life.
• High Cutting Efficiency: Arc-shaped cross-cut structure ensures smooth cutting and excellent chip evacuation.
• Wide Applications: Suitable for machining metals with hardness ≤ HRC55 (carbon steel, alloy steel, stainless steel, etc.).
• Heavy-Duty Performance: Ideal for rapid removal of large amounts of material and heavy-duty rough machining.

Applications

• Foundry industry
• Welding and fabrication
• Heavy machinery manufacturing
• Mold industry
• Aerospace

Technical Standard

• Manufactured according to ISO 7755-1984(E) standard
• Available in 12 models and 78 specifications of tungsten carbide rotary burrs
• Support for customer-supplied materials, sample-based trial production, and non-standard customization

Case Study

Precision Finishing of Concave Mold Surfaces
Mold cavities often contain concave curved surfaces that ordinary rotary burrs cannot effectively reach. The L-Type double-cut rotary burr, with its inverted taper design, perfectly fits these surfaces. By adjusting the cutting angle, it enables efficient machining of special concave profiles, significantly improving both the quality and efficiency of mold processing.

Operation & Maintenance

• Moderate Pressure: Avoid excessive force to prevent overheating or premature wear (use reduced speed for extended burrs).
• Speed Control: Designed for high-speed operation; follow recommended speeds and adjust according to material type.
• Safety Protection: Wear safety goggles and cut-resistant gloves to protect against flying chips.
• Regular Cleaning: Remove debris to maintain peak performance.

Advantages at a Glance

• Strong and durable, with sharp cutting edges that leave no burrs
• Excellent heat resistance and wear resistance
• The first choice for metal grinding and finishing tasks