Busch Carbide Flame Cutter | Busch No. 425FX 040 – Fine Crosscut – HP | Pack of 1
The carbide cutter flame fine double cut from Busch & Co. GmbH (425FX 040) is a precision-engineered rotary cutting instrument designed for demanding applications across multiple technical disciplines. Classified under ISO standard 500 104 274 140 040, this instrument features a flame geometry combined with a fine double cut pattern, identified by a red ring, delivering controlled and consistent material removal.
Product Specifications
- Type: Carbide Cutter
- Shape: Flame
- Cut: Fine Double Cut
- Identification: Red Ring
- ISO Classification: 500 104 274 140 040
- Pack Quantity: 1
Applications
The carbide cutter flame fine double cut is well-suited for the following dental laboratory applications:
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Crown and Bridge Technology — Shaping, trimming and finishing of crown and bridge frameworks in the laboratory. |
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Plastics Technology — Shaping, trimming and finishing of acrylic dentures and appliances. |
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Model Making — Trimming and detailing of plaster and stone models. |
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Model Casting Technique — Finishing and adjustment of cast metal frameworks. |
Instrument Dimensions
| Head Ø | 4.0 mm (ISO size 040) |
|---|---|
| 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.
German Engineering Quality
Manufactured in Germany, this carbide cutter flame fine double cut reflects the exacting standards that Busch & Co. GmbH has maintained throughout its long history of producing precision rotary instruments. The fine double cut geometry ensures smooth surface finishes and minimises material stress during use.
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 does the red ring indicate on this cutter? The red ring identifies this instrument as a fine double cut, denoting the specific cutting pattern and tooth configuration of the carbide cutter.
What ISO classification does the 425FX 040 follow? This instrument is classified under ISO 500 104 274 140 040, ensuring compatibility and standardisation across professional applications.
Is the carbide cutter flame fine double cut suitable for dental laboratory use? Yes, it is appropriate for crown and bridge technology as well as model casting technique, making it a versatile choice for dental laboratory professionals.
Specifications: Busch No. 425FX 040
| Busch figure | 425FX |
| Shape | Flame |
| ISO size / head diameter | 040 (4.0 mm max head Ø) |
| Cut type / toothing | Fine Crosscut |
| Shank | HP |
| Lab applications (per Busch) | Crown and Bridge Technology, Model Casting Technique, Model Making, Plastics Technology |
| Pack size | Pack of 1 |
| Material | Carbide |
The flame head tapers from a full body to a fine point, for interdental areas, embrasures and blending contours on acrylic and frameworks. A 4.0 mm head is a bulk-work size, best on denture bases and other wide surfaces. Fine crosscut teeth trade removal speed for surface quality: use it after shaping, as the last cutting step before polishers.
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.
Busch Carbide Flame Cutter | Busch No. 425FX 040 – Fine Crosscut – ...
