US No. 1157 Busch Carbide Straight Fissure (Cylinder) Round Bur | Busch No. 21R 010 – HP | Pack of 6
The carbide cylinder round dental bur from Busch & Co. GmbH is a precision-engineered cutting instrument designed to deliver consistent, controlled material removal across a range of professional applications. Manufactured in Germany, this cutter meets exacting quality standards expected in technical and clinical environments.
Product Details
This instrument is classified as a Carbide Cutter, Cylinder Round, conforming to ISO standard 500 104 137 006 010 (US No. 1157). Sold as a convenient pack of 6, it ensures continuity of work without frequent restocking interruptions.
Applications
The carbide cylinder round dental 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. |
Instrument Dimensions
| Head Ø | 1.0 mm (ISO size 010) |
|---|---|
| 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 Cylinder Round Dental Bur
As a carbide cylinder round dental bur, this instrument combines a cylindrical geometry with a round end profile, allowing smooth lateral and end-cutting performance. Carbide construction provides superior hardness and wear resistance compared to standard steel burs, extending the effective working life of each instrument.
The carbide cylinder round dental bur is particularly valued in precision trades where geometry consistency and cutting efficiency are critical. Whether used in dental laboratories, prosthetics, or technical model work, it delivers reliable results instrument after instrument.
Made in Germany
Busch & Co. GmbH instruments are manufactured in Germany, reflecting a longstanding tradition of precision toolmaking and quality craftsmanship.
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 the ISO classification for this bur? This carbide cylinder round dental bur is classified under ISO 500 104 137 006 010.
How many burs are included per pack? Each pack contains 6 burs.
What materials can this bur cut? It is suitable for use on plastics, model materials, and dental restorations including crown and bridge applications.
Compare With
| Manufacturer | Reference |
|---|---|
| Komet (Gebr. Brasseler) | H21R.104.010 |
Manufacturer literature: Busch catalogs and product brochures for this line are available in our Busch Burs Catalog Library.
Specifications: Busch No. 21R 010
| Busch figure | 21R |
| US No. | 1157 |
| Shape | Straight Fissure (Cylinder) Round |
| ISO size / head diameter | 010 (1.0 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 |
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. A 1.0 mm head works in narrow interdental and clasp areas where a larger head cannot reach.
Read the guides: Dental Laboratory Burs, Polishers & Abrasives · Bur Speed Chart · Dental Bur Glossary · All lab carbide cutters
This is a US No. 1157. See all 2 Busch versions — materials, shanks, cuts and packs — on our US No. 1157 page.
US No. 1157 Busch Carbide Straight Fissure (Cylinder) Round Bur | B...
