US No. 39 Busch Carbide Inverted Cone Bur | Busch No. 2 018 – HP | Pack of 6
The inverted cone carbide cutter bur from Busch & Co. GmbH is a precision-engineered rotary cutting instrument designed for demanding applications across multiple technical disciplines. Manufactured in Germany to exacting standards, this carbide cutter delivers consistent, reliable performance in professional environments.
Product Classification
This tool is classified under ISO standard 500 104 010 001 018 (US No. 39), identifying it as a taper (cone) inverted carbide cutter. It is supplied in a convenient pack of 6, ensuring continuity of work without frequent reordering.
Key Features
- Inverted cone geometry for precise undercutting and cavity preparation
- Carbide construction for extended tool life and superior cutting efficiency
- Consistent dimensional accuracy across each unit in the pack
- Engineered and manufactured in Germany
Instrument Dimensions
| Head Ø | 1.8 mm (ISO size 018) |
|---|---|
| Shank | HP (Straight Handpiece) — 2.35 mm Ø, 44.5 mm overall length (ISO 104) |
Per ISO 6360, the size number is the maximum head diameter in tenths of a millimeter. See our Busch Bur Size Chart for the full size conversion table, shank codes, and color ring guide.
Applications
The inverted cone carbide cutter bur is well-suited for the following dental laboratory applications:
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Crown and Bridge Technology — Shaping, trimming and finishing of crown and bridge frameworks in the laboratory. |
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Plastics Technology — Shaping, trimming and finishing of acrylic dentures and appliances. |
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Model Making — Trimming and detailing of plaster and stone models. |
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Model Casting Technique — Finishing and adjustment of cast metal frameworks. |
German Engineering
As with all Busch instruments, this inverted cone carbide cutter bur reflects the precision and quality associated with German manufacturing. Each piece is produced to tight tolerances, ensuring repeatable results across professional and technical workflows.
Busch Warranty & 90-Day Returns
This Busch instrument is guaranteed against manufacturing and workmanship defects — we'll repair or replace it under normal professional use. Unused product in original packaging can also be returned or exchanged within 90 days of your invoice date. Full terms are on our Warranty page.
FAQ
What is an inverted cone carbide cutter bur used for? It is used for undercutting, shaping, and material removal in model making, dental laboratory work, plastics technology, and related technical applications.
How many burs are included? This listing includes a pack of 6 units, classified as US No. 39 / ISO 500 104 010 001 018.
Compare With
| Manufacturer | Reference |
|---|---|
| Komet (Gebr. Brasseler) | H2.104.018 |
| Brasseler USA | H2.11.018 |
| Meisinger | HM2-018-HP |
| SS White | 310063 |
| NTI (Kerr Rotary) | HP39-KC5 |
| Edenta | C2.104.018 |
Manufacturer literature: Busch catalogs and product brochures for this line are available in our Busch Burs Catalog Library.
Specifications: Busch No. 2 018
| Busch figure | 2 |
| US No. | 39 |
| Shape | Inverted Cone |
| ISO size / head diameter | 018 (1.8 mm max head Ø) |
| Shank | HP |
| Lab applications (per Busch) | Crown and Bridge Technology, Model Casting Technique, Model Making, Plastics Technology |
| Pack size | Pack of 6 |
| Material | Carbide |
The inverted cone has a wider end than base, so it undercuts: it is used in the lab to cut retention undercuts and flat-floored recesses. A 1.8 mm head gives enough edge for shaping while still following tooth-sized contours.
Read the guides: Dental Laboratory Burs, Polishers & Abrasives · Bur Speed Chart · Dental Bur Glossary · All lab carbide cutters
This is a US No. 39. See all 2 Busch versions — materials, shanks, cuts and packs — on our US No. 39 page.
US No. 39 Busch Carbide Inverted Cone Bur | Busch No. 2 018 – HP | ...
