US No. 57L Busch Carbide Straight Fissure (Cylinder) Long Bur | Busch No. 21L 010 – HP | Pack of 6
The carbide cylinder flat cutter dental bur 21L 010 (US No. 57L) from Busch & Co. GmbH is a precision-engineered HP straight fissure (cylinder) long carbide instrument designed for demanding dental and technical applications. This carbide cylinder flat cutter dental bur is classified under ISO standard 500 104 110 006 010, ensuring consistent quality and dimensional accuracy across every pack.
Product Overview
Manufactured in Germany, this instrument delivers the reliability and precision that professionals in dental and technical fields require. The long cylinder form factor and carbide construction make it well-suited for controlled material removal across a range of substrates. Each pack contains 6 burs, providing excellent value for busy practices and technical workshops.
Key Features
- Type: Carbide Cutter, Cylinder Flat
- US No.: 57L
- ISO Classification: 500 104 110 006 010
- Shank: HP (Handpiece)
- Pack Quantity: 6 pieces
- Origin: Made in Germany
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.
Applications
This carbide cylinder flat cutter dental bur is suitable for a broad range of professional applications, including:
Whether you are working in a dental laboratory or a technical production environment, the carbide cylinder flat cutter dental bur 21L 010 offers the consistent cutting performance and durability expected from a German-engineered instrument. Busch & Co. GmbH has long been recognized for producing precision rotary instruments that meet the exacting standards of dental and technical professionals worldwide.
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. |
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? The ISO classification is 500 104 110 006 010.
How many burs are included in each pack? Each pack contains 6 burs.
What shank type does the 21L 010 use? It uses an HP (Handpiece) shank.
Where is this bur manufactured? This instrument is made in Germany by Busch & Co. GmbH.
Compare With
| Manufacturer | Reference |
|---|---|
| Komet (Gebr. Brasseler) | H21L.104.010 |
| Brasseler USA | H21L.11.010 |
| Edenta | C21L.104.010 |
Manufacturer literature: Busch catalogs and product brochures for this line are available in our Busch Burs Catalog Library.
Specifications: Busch No. 21L 010
| Busch figure | 21L |
| US No. | 57L |
| Shape | Straight Fissure (Cylinder) Long |
| 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 long straight fissure head keeps the parallel-sided cylinder profile but reaches deeper, for slots and walls that a standard-length head cannot follow. At 1.0 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. 57. See all 5 Busch versions — materials, shanks, cuts and packs — on our US No. 57 page.
US No. 57L Busch Carbide Straight Fissure (Cylinder) Long Bur | Bus...
