Busch Shorties Carbide Round Bur | Busch No. S 421FX 023 – HP | Pack of 2

The carbide cutter round fine double cut shortie from Busch & Co. GmbH is a precision-engineered rotary instrument designed for demanding material removal and finishing tasks across multiple technical disciplines. Manufactured in Germany, this instrument reflects the exacting quality standards that Busch has maintained for professional applications worldwide.

Product Details

This instrument is classified under ISO standard 500 104 001 140 023, providing a reliable reference for procurement and clinical or workshop compatibility. The round form combined with a fine double cut geometry makes the carbide cutter round fine double cut shortie ideal for controlled, precise work in confined spaces where a standard-length shank would be impractical. The shortie format offers enhanced stability and reduced vibration during use.

Applications

As a carbide cutter round fine double cut shortie, this instrument delivers consistent cutting performance across all listed applications, maintaining surface quality while allowing the operator fine control over stock removal.

The carbide cutter round fine double cut shortie 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

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.

Pack Information

This product is supplied as a pack of 2, ensuring continuity of work and reducing downtime associated with instrument changeovers.

FAQ

What ISO classification does this carbide cutter round fine double cut shortie carry? It is classified under ISO 500 104 001 140 023.

How many units are included? Each pack contains 2 instruments.

What industries is this instrument suited for? It is suited for model making, plastics technology, crown and bridge technology, and model casting technique.