US No. 1558 Busch Carbide Straight Fissure (Cylinder) Round Bur | Busch No. 31R 012 – Crosscut – HP | Pack of 6
The carbide cylinder round dental bur from Busch & Co. GmbH is a precision rotary cutting instrument engineered for demanding applications across dental and technical disciplines. Featuring a cylinder round head profile in a high-polish carbide construction, this bur delivers consistent, controlled material removal with every pass.
Product Classification
This carbide cylinder round dental bur is classified under ISO standard 500 104 137 007 012, ensuring compatibility and traceability within professional workflows. The HP (handpiece) shank design makes it suitable for standard straight handpiece connections commonly used in laboratory and technical environments.
Key Applications
- Model Making – Precise shaping and detailing of working models
- Plastics Technology – Efficient cutting and trimming of plastic materials
- Crown and Bridge Technology – Accurate preparation and finishing for prosthetic restorations
- Model Casting Technique – Reliable material removal during cast model refinement
Instrument Dimensions
| Head Ø | 1.2 mm (ISO size 012) |
|---|---|
| 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.
Why Choose This Carbide Bur?
As a carbide cylinder round dental bur, this instrument offers superior hardness and wear resistance compared to standard steel alternatives. The cylinder round geometry allows for flat-bottomed preparations and parallel wall cutting, giving technicians and clinicians predictable, repeatable results. Manufactured in Germany, Busch burs are synonymous with exacting tolerances and long service life.
This product is supplied as a pack of 6, providing excellent value for high-volume laboratory or clinical use. Each bur in the pack meets the same strict quality standards, ensuring uniformity across your entire workflow.
FAQ
What is the ISO classification for this bur? This carbide cylinder round dental bur is classified as ISO 500 104 137 007 012.
How many burs are included? Each order contains a pack of 6 individual burs.
What shank type does this bur use? It features an HP (handpiece) shank, compatible with standard straight laboratory handpieces.
Where is this product manufactured? This bur is Made in Germany by Busch & Co. GmbH.
Compare With
| Manufacturer | Reference |
|---|---|
| Komet (Gebr. Brasseler) | H31R.104.012 |
| Brasseler USA | H31R.11.012 |
| Meisinger | HM31R-012-HP |
| SS White | 310082 |
| Alpen (Coltène) | R601558 |
| Edenta | C31R.104.012 |
Manufacturer literature: Busch catalogs and product brochures for this line are available in our Busch Burs Catalog Library.
Specifications: Busch No. 31R 012
| Busch figure | 31R |
| US No. | 1558 |
| Shape | Straight Fissure (Cylinder) Round |
| ISO size / head diameter | 012 (1.2 mm max head Ø) |
| Cut type / toothing | Crosscut |
| Shank | HP |
| Lab applications (per Busch) | Crown and Bridge Technology, Model Casting Technique, Model Making, Plastics Technology |
| Pack size | Pack of 6 |
| Material | Carbide |
With parallel sides and a domed end, the straight fissure round head cuts straight walls while leaving a rounded floor, which is kinder to the material than a sharp internal corner. Its crosscut (double-cut) toothing removes stock quickly and clears chips well, so it is a shaping rather than a finishing cutter. At 1.2 mm the head is small, suited to interdental areas, clasp spaces and fine detail rather than bulk work.
Read the guides: Dental Laboratory Burs, Polishers & Abrasives · Bur Speed Chart · Dental Bur Glossary · All lab carbide cutters
This is a US No. 1558. See all 2 Busch versions — materials, shanks, cuts and packs — on our US No. 1558 page.
US No. 1558 Busch Carbide Straight Fissure (Cylinder) Round Bur | B...
