Busch Carbide Taper (Cone) Round Bur | Busch No. 429GX 045 – Coarse Grit, Crosscut – HP | Pack of 1
The carbide taper (cone) round coarse double cut bur from Busch & Co. GmbH is a precision rotary cutting instrument designed for demanding material removal tasks in both model making and plastics technology applications. Engineered and manufactured in Germany, this cutter delivers consistent, reliable performance across a wide range of workpiece materials.
Product Specifications
- Type: Carbide Cutter, Taper (Cone) Round
- Cut: Coarse Double Cut
- ISO Classification: 500 104 194 220 045
- Shank: HP (Handpiece)
- Pack Quantity: 1
Key Features
As a carbide taper (cone) round coarse double cut bur, the 429GX 045 features a taper (cone)-round geometry that facilitates efficient stock removal and precise contouring. The coarse double cut pattern is optimized for aggressive material reduction while maintaining control over the cutting path. The HP shank configuration ensures compatibility with standard handpiece systems used in professional and technical environments.
Instrument Dimensions
| Head Ø | 4.5 mm (ISO size 045) |
|---|---|
| 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 taper (cone) round coarse double cut bur is part of the trusted Busch range, backed by a long-standing tradition of German precision manufacturing. Whether you are working with resins, acrylics, or other synthetic materials, this instrument is engineered to perform consistently under professional conditions.
The carbide taper (cone) round coarse double cut 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. |
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 shank type does this bur use? This bur features an HP (Handpiece) shank, compatible with standard HP handpiece systems.
What is the ISO classification for this product? The ISO classification is 500 104 194 220 045.
What applications is this carbide taper (cone) round coarse double cut bur suited for? It is primarily suited for model making and plastics technology applications requiring efficient material removal and precise contouring.
Specifications: Busch No. 429GX 045
| Busch figure | 429GX |
| Shape | Taper (Cone) Round |
| ISO size / head diameter | 045 (4.5 mm max head Ø) |
| Cut type / toothing | Coarse Grit, Crosscut |
| Shank | HP |
| Lab applications (per Busch) | Model Making, Plastics Technology |
| Pack size | Pack of 1 |
| Material | Carbide |
The taper (cone) round head is the all-purpose lab contouring shape: the cone reaches into interdental areas and around clasps while the rounded tip avoids gouging. The coarse crosscut is for bulk reduction: it takes material off fast and is followed by a medium or fine cutter. At 4.5 mm the head is on the larger side, for covering wide acrylic surfaces in fewer passes.
Read the guides: Dental Laboratory Burs, Polishers & Abrasives · Bur Speed Chart · Dental Bur Glossary · All lab carbide cutters
Part of our Double Cut Burs: Busch Crosscut Carbide Cutter Collection — browse all 142 shapes, cuts and sizes.

