Busch Carbide Conical Cutter | Busch No. 408RFX 4 – GR.HP-SH | Pack of 2
The carbide taper (cone) round dental bur pre-shaping 408RFX is a precision-engineered rotary instrument designed for efficient and controlled material removal in restorative and preparatory dental procedures. Manufactured by Busch & Co. GmbH, this conical cutter delivers reliable performance in demanding clinical environments.
Product Overview
This instrument is classified as a Carbide Cutter, Taper (Cone) Round, Pre-Shaping, with a 4° taper angle, optimized for the Milling Technique. The standard ISO classification is 500 103 200 143 028, ensuring compatibility and traceability across clinical and laboratory workflows. Each pack contains 2 burs, providing a practical and cost-effective supply for everyday use.
Key Features
- Carbide construction for exceptional hardness and wear resistance
- Conical round geometry ideal for pre-shaping preparations
- 4° taper angle for precise, controlled cutting angles
- Optimized for the Milling Technique
- ISO classified: 500 103 200 143 028
- Supplied as a pack of 2
Applications
The carbide taper (cone) round dental bur pre-shaping instrument is suited for Precision Technique applications, where consistent geometry and reliable cutting performance are essential. It is particularly effective in pre-shaping procedures requiring repeatable accuracy.
The carbide taper (cone) round dental bur pre-shaping is well-suited for the following dental laboratory applications:
| Precision Technique — Fine detail work requiring accurate, controlled material removal. |
German Engineering
As with all Busch instruments, this carbide taper (cone) round dental bur pre-shaping tool is proudly made in Germany, reflecting a commitment to quality craftsmanship and precision manufacturing standards.
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 500 103 200 143 028.
How many burs are included per pack? Each pack contains 2 burs.
What technique is this bur optimized for? This carbide taper (cone) round dental bur pre-shaping instrument is optimized for the Milling Technique and Precision Technique applications.
Specifications: Busch No. 408RFX 4°
| Busch figure | 408RFX |
| Shape | Conical |
| Taper angle | 4° |
| Cut type / toothing | Pre-shaping cut |
| Shank | GR.HP-SH (short shank) |
| Line / technique | Precision Technique |
| Pack size | Pack of 2 |
| Material | Carbide |
The conical milling head is made for precision (milling) technique, where a defined taper angle produces convergent surfaces on telescope and attachment work. The pre-shaping cut removes stock quickly in the first milling pass and is followed by the fine and super fine cutters. The 4° taper gives a moderate draw for milled telescope and attachment surfaces.
Read the guides: Dental Laboratory Burs, Polishers & Abrasives · Bur Speed Chart · Dental Bur Glossary · All lab carbide cutters

