Busch Carbide Round Cutter | Busch No. 421X 040 – Crosscut – HP | Pack of 1
The carbide cutter round medium double cut from Busch & Co. GmbH is a precision rotary tool engineered for demanding material removal tasks across multiple professional disciplines. Designed with a round head geometry and a medium double cut tooth pattern, this cutter delivers controlled, efficient stock removal with reduced clogging and smooth surface results.
Product Specifications
- Type: Carbide Cutter, Round
- Cut: Medium Double Cut
- Standard Classification: ISO: 500 104 001 190 040
- Model: Busch Carbide Round Cutter | Busch No. 421X 040 – Cross Cut – HP
- Pack Quantity: 1
Applications
The carbide cutter round medium 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.
Why Choose Busch Carbide Cutters
The carbide cutter round medium double cut is manufactured in Germany, reflecting Busch & Co. GmbH's longstanding commitment to precision engineering and quality craftsmanship. The medium double cut configuration balances aggressive material removal with a refined surface finish, making it a versatile choice for both technical and dental laboratory environments.
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 materials can this carbide cutter be used on? This carbide cutter round medium double cut is generally suited for plastics, dental model materials, and similar workpieces commonly encountered in laboratory and technical settings.
What shank type does this cutter use? This cutter is designed for HP (Handpiece) compatibility, as indicated by the HP designation in the product name.
Is this product sold individually? Yes, this item is sold as a pack of 1.
Specifications: Busch No. 421X 040
| Busch figure | 421X |
| Shape | Round |
| ISO size / head diameter | 040 (4.0 mm max head Ø) |
| Cut type / toothing | 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 round head cuts in every direction, which makes it the shape for opening, hollowing and relieving acrylic, plaster and model surfaces rather than for flat work. The 4.0 mm head is a large size for fast reduction of denture bases and broad framework surfaces. The crosscut pattern gives fast, cool material removal; follow with a fine cut for the final surface.
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 Round Cutter | Busch No. 421X 040 – Crosscut – HP | P...
