US No. 7 Busch Steel Round Bur | Busch No. 1 021 – HP | Pack of 6
The round steel rosehead dental bur from Busch & Co. GmbH is a precision-engineered rotary instrument designed for demanding applications in Plastics Technology and Model Making. Manufactured to exacting German standards, this bur delivers consistent, controlled material removal across a wide range of workpiece materials.
Product Specifications
- Type: Round, Rosehead
- Material: Steel
- Size: US No. 7 (1 021)
- Pack Quantity: 6 pieces
- Standard Classification: ISO 310 104 001 001 021
Key Features
The round steel rosehead dental bur features a classic rosehead cutting geometry that facilitates efficient chip evacuation and smooth surface finishes. The all-steel construction provides reliable rigidity and edge retention, making it a dependable choice for repetitive, high-precision work. Each pack contains 6 burs, ensuring consistent availability in professional and workshop environments.
Instrument Dimensions
| Head Ø | 2.1 mm (ISO size 021) |
|---|---|
| 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
The round steel rosehead dental bur is well-suited for the following dental laboratory applications:
| Plastics Technology — Shaping, trimming and finishing of acrylic dentures and appliances. | |
| Model Making — Trimming and detailing of plaster and stone models. |
German Engineering Quality
This round steel rosehead dental bur is proudly made in Germany, reflecting Busch & Co. GmbH's long-standing commitment to precision manufacturing and quality craftsmanship. Each instrument is produced under strict quality controls to meet the expectations of professional users worldwide.

FAQ
What is the ISO classification for this bur? This round steel rosehead dental bur is classified under ISO 310 104 001 001 021.
How many burs are included per pack? Each pack contains 6 individual burs.
What size is this bur? It corresponds to US No. 7 (1 021).

