US No. 7 Busch Carbide Round Bur | Busch No. 1 021 – RA | Pack of 6
The round carbide rosehead dental bur from Busch & Co. GmbH is a precision-engineered rotary instrument designed for reliable and consistent performance in clinical dental applications. Manufactured in Germany to exacting standards, this bur delivers the cutting efficiency and durability that dental professionals demand.
Product Details
- Type: Carbide, Round, Rosehead
- ISO Classification: 500 204 001 001 021
- US Number: No. 7
- Shank Type: RA (Right Angle / Latch-Type)
- Pack Quantity: 6 burs per pack
Applications
The round carbide rosehead dental bur is well suited for the following clinical procedures:
As a versatile round carbide rosehead dental bur, this instrument supports efficient tissue removal while maintaining the integrity of surrounding tooth structure. Its rosehead geometry provides smooth, predictable cutting in RA handpieces commonly used in restorative and preparatory procedures.
The round carbide rosehead dental bur is well-suited for the following clinical procedures:
| Cavity/Fissure Preparation — Opening, extending and shaping cavities and fissures with controlled removal of enamel and dentin. |
Instrument Dimensions
| Head Ø | 2.1 mm (ISO size 021) |
|---|---|
| Shank | RA / CA (Contra-Angle, latch) — 2.35 mm Ø, 22 mm overall length (ISO 204) |
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.
Made in Germany
Busch & Co. GmbH has a long-standing reputation for manufacturing high-quality dental rotary instruments. Each round carbide rosehead dental bur in this range is produced with German engineering precision, ensuring consistent geometry, sharp cutting edges, and long-lasting performance across procedures.

FAQ
What shank type does this bur use? This bur features an RA (Right Angle / Latch-Type) shank, compatible with standard slow-speed contra-angle handpieces.
How many burs are included? Each pack contains 6 burs.
What is the ISO classification for this bur? The ISO classification is 500 204 001 001 021.
Compare With
| Manufacturer | Reference |
|---|---|
| Komet (Gebr. Brasseler) | H1.204.021 |
| Brasseler USA | H1.21.021 |
| Meisinger | HM1-021-RA |
| SS White | 310007 |
| Alpen (Coltène) | R200007 |
| Edenta | C1.204.021 |
Manufacturer literature: Busch catalogs and product brochures for this line are available in our Busch Burs Catalog Library.

