Grewin Jin Niu K-Type Rotary Burr — The Ideal Tool for Precision Chamfering and Finishing
Product Overview
The Grewin Jin Niu K-type rotary burr features a standard straight cone shape: a sharp tip that gradually thickens toward the base. While similar in shape to the C-type burr, it adopts a single-edge spiral structure.
The continuous spiral cutting edge runs from the tip to the base, producing smooth and uniform cutting patterns.
When high-quality surface finishing of bevels or conical holes and precision chamfering are required, the K-type single-cut rotary burr is the ideal choice.
Features
- Carbide material: premium and mainstream, extremely hard, wear-resistant, and capable of maintaining sharp cutting edges for a long time.
- Precision machining tool: ensures dimensional stability and consistent surface quality.
- Single-edge spiral design: provides smooth cutting, reduces vibration, and minimizes burr formation.
- Optimized for finishing: delivers excellent bevel smoothness and precise angle control.
Suitable Materials
- Metals with hardness ≤ HRC40 (e.g., cast iron, low-hardness carbon steel).
- Especially suitable for chamfering, conical surface finishing, and fine slot machining.
Application Fields
- Mold industry
- Precision chamfering tasks
- Precision mechanical processing
- Medical device manufacturing
- Aerospace
Technical Specifications
- Manufactured according to ISO 7755-1984(E)
- Available in 12 models and 78 specifications of carbide rotary burrs
- Supports OEM, sample trial production, and non-standard customization
Operation & Maintenance
- Safety: wear protective goggles and cut-resistant gloves to prevent flying chips.
- Regular cleaning: remove chip residues to maintain optimal performance.
- Proper force: avoid excessive pressure to prevent overheating and premature wear (reduce speed for extended tools).
- Speed control: designed for high-speed operation, follow recommended speeds and adjust according to material type.
Case Study — Weld Seam Leveling and Finishing
After welding two thick steel plates, a tall, wide weld seam remained. The task was to grind the seam flush with the base material.
Using a K-type single-cut rotary burr, the technician directly “milled” the weld seam with its flat end face. Since the burr diameter was larger than the weld width, the seam was leveled evenly with the base material without forming concave pits.
The result was a smooth, flat, and aesthetically improved weld area with more uniform stress distribution and enhanced structural reliability.
