US No. 57 Busch Carbide Straight Fissure (Cylinder) Bur | Busch No. 21 010 – HP | Pack of 6
The carbide cylinder flat cutter dental bur from Busch & Co. GmbH is a precision-engineered rotary instrument designed for demanding cutting and shaping tasks across a range of professional disciplines. Manufactured in Germany, this instrument — catalogue reference 21 010 (US No. 57) — is classified under ISO standard 500 104 107 006 010 and is supplied in a convenient pack of six.
Product Overview
This carbide cylinder flat cutter dental bur features a cylinder flat geometry that delivers clean, controlled material removal. The carbide construction ensures long-lasting edge retention and consistent cutting performance across repeated use. As a high-performance (HP) shank instrument, it is compatible with standard straight handpieces used in laboratory and technical settings.
Applications
The carbide cylinder flat cutter 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. |
Key Features
- Cylinder flat cutter geometry for uniform, flat-bottomed cuts
- Solid carbide construction for durability and cutting efficiency
- ISO classification: 500 104 107 006 010
- HP (straight handpiece) shank type
- Pack of 6 for laboratory convenience
- Made in Germany
Whether you are working in dental technology, model casting, or plastics fabrication, the carbide cylinder flat cutter dental bur provides the reliability and precision that professionals require. Each bur in this pack meets the exacting quality standards associated with Busch & Co. GmbH's German manufacturing heritage.
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.
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 handpiece is this bur compatible with? This is an HP (high-performance straight handpiece) shank bur, compatible with standard laboratory straight handpieces.
How many burs are included in this pack? Each pack contains 6 individual burs.
What is the ISO classification for this instrument? The ISO classification is 500 104 107 006 010.
Is this carbide cylinder flat cutter dental bur made in Germany? Yes, it is manufactured in Germany by Busch & Co. GmbH.
Compare With
| Manufacturer | Reference |
|---|---|
| Komet (Gebr. Brasseler) | H21.104.010 |
| Brasseler USA | H21.11.010 |
| Meisinger | HM21-010-HP |
| SS White | 310064 |
| NTI (Kerr Rotary) | HP57-KC5 |
| Edenta | C21.104.010 |
Manufacturer literature: Busch catalogs and product brochures for this line are available in our Busch Burs Catalog Library.
Specifications: Busch No. 21 010
| Busch figure | 21 |
| US No. | 57 |
| Shape | Straight Fissure (Cylinder) |
| 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 |
The straight fissure (cylinder) head has parallel sides and a flat end, so it cuts straight-walled slots, flat steps and parallel surfaces. 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. 57. See all 5 Busch versions — materials, shanks, cuts and packs — on our US No. 57 page.
US No. 57 Busch Carbide Straight Fissure (Cylinder) Bur | Busch No....
