US No. 1159 Busch Carbide Straight Fissure (Cylinder) Round Bur | Busch No. 21R 014 – HP | Pack of 6
The carbide cylinder round bur from Busch & Co. GmbH is a precision-engineered rotary cutting instrument designed for demanding material removal and shaping tasks across multiple professional disciplines. Built to the highest standards of German manufacturing, this bur delivers consistent, controlled cutting performance in every application.
Product Classification
This carbide cylinder round bur is classified under ISO standard 500 104 137 006 014 (US No. 1159), ensuring full compatibility and traceability within regulated professional environments. It is supplied as a convenient pack of 6, reducing downtime and ensuring a ready supply for high-volume workflows.
Applications
The carbide cylinder round bur is well-suited for the following dental laboratory applications:
| Crown and Bridge Technology — Shaping, trimming and finishing of crown and bridge frameworks in the laboratory. | |
| Plastics Technology — Shaping, trimming and finishing of acrylic dentures and appliances. | |
| Model Making — Trimming and detailing of plaster and stone models. | |
| Model Casting Technique — Finishing and adjustment of cast metal frameworks. |
Instrument Dimensions
| Head Ø | 1.4 mm (ISO size 014) |
|---|---|
| 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 Bur?
As a carbide cylinder round bur, this instrument combines a robust carbide cutting head with a cylindrical round geometry that facilitates both lateral and end-cutting action. The result is versatile, efficient material removal with minimal vibration and superior surface finish. Every bur in this product line is proudly made in Germany, reflecting decades of precision engineering expertise.

FAQ
What ISO classification does this bur carry? This bur is classified as ISO 500 104 137 006 014.
How many burs are included in each pack? Each pack contains 6 burs.
Is this a genuine Busch & Co. GmbH product? Yes, this carbide cylinder round bur is manufactured by Busch & Co. GmbH in Germany.
Compare With
| Manufacturer | Reference |
|---|---|
| Komet (Gebr. Brasseler) | H21R.104.014 |
| Brasseler USA | H21R.11.014 |
| Meisinger | HM21R-014-HP |
| Edenta | C21R.104.014 |
Manufacturer literature: Busch catalogs and product brochures for this line are available in our Busch Burs Catalog Library.

