The carbide rotary file (or carbide burr) is a heavy-duty cutting bit used in die grinders and rotary tools for carving, deburring, and smoothing hard materials like steel, aluminum, and dense woods. It features a solid tungsten carbide head designed to run at high speeds (up to 50,000 RPM) without dulling.
For heavy material removal, opt for double-cut (cross-cut) bits, which create smaller chips and are ideal for softer metals, plastics, and wood. For dense or hardened steels, single-cut (fluted) bits are preferred for clean finishes.
Common shapes and their uses include:
Cylindrical: For flat surface work and right-angle corners.
Ball (Spherical): For hollowing, concave cuts, and contouring.
Tree/Cone: For accessing hard-to-reach areas and rounded edges. Standard bits usually feature a 1/4" or 3mm or 6mm shank for larger die grinders, though 1/8" options are available for standard rotary tools.
SPEC
|
Material |
Solid tungsten carbide |
|
Coating |
Uncoated |
|
Chemical Composition |
10% Co & 90% WC |
|
Grain Size |
1.2 μm |
|
Hardness (HRA) |
≥90 |
|
Magnetic Force |
23 (KA/M) |
|
T.R.S |
3200 (N/mm2) |
|
Magnetic Saturation |
10.3 (Ms) |
|
Purpose |
Kind of pilots tool (core shaft) for the seat and guide machines |
|
Density |
14.05 (g/cm3) |
Tungsten Cemented Carbide Grade
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Company Information
Kunshan Zhiyi Dingli Cemented Carbide Tool Co., Ltd. has built a reputation for producing high-performance carbide rotary burs that meet demanding material-removal requirements. Our factory utilizes advanced CNC grinding technology and submicron carbide grades to ensure every bur delivers consistent geometry, extended tool life, and superior surface finish on hardened steels, stainless steels, and superalloys.
Our rotary burs are exported to more than 30 countries across Europe, North America, and Southeast Asia. We maintain strict quality control from raw material selection through final inspection, ensuring each bur meets ISO 9001 quality standards. Customers in automotive, aerospace, and mold-making industries rely on our tools for precision material removal applications.
Testing Machine
Production Flow Chart
Packing & Delivery
Packing
1>Put the goods encased with plastic bag or plastic case in wooden box/carton/iron box,etc.
2>Other packing will be accept according to your needs.
FAQ
Q1: What shank sizes do your rotary burs come in?
A1: We offer ×3 mm and ×6 mm standard shanks; ×8 mm and custom shanks are available on request.
Q2: Do you offer coated burs?
A2: Yes, we provide TiAlN and AlTiN coatings for extended tool life in abrasive materials.
Q3: What is the typical lead time?
A3: Standard sizes ship within 5–7 working days; custom shapes require 15–20 days.
About Color Aberration
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Cargo Receipt
All our products go through strict inspection and count before shipment. Please check the goods in person when they receive them.
Please refuse to sign and contact us if you find that the CTN number and model is wrong or the product is damaged in transit.
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