US No. 58L Busch Carbide Straight Fissure (Cylinder) Long Bur | Busch No. 21L 012 – HP | Pack of 6

The carbide cylinder flat cutter dental bur from Busch & Co. GmbH is a precision-engineered rotary instrument designed for demanding applications in dental and technical laboratories. Manufactured in Germany, this cutter delivers the consistent performance and dimensional accuracy that professionals expect from a premium-grade tool.

Product Details

This instrument is classified as a Carbide Cutter, Cylinder Flat, conforming to the standard ISO classification 500 104 110 006 012 (US No. 58L). It is supplied in a convenient pack of 6, ensuring availability for continuous workflow without frequent reordering. The long shank HP (handpiece) configuration provides extended reach and enhanced control in precision cutting tasks.

Applications

The carbide cylinder flat cutter dental bur 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.

Why Choose This Carbide Cutter?

As a carbide cylinder flat cutter dental bur, this instrument features a flat-ended cylindrical geometry that enables smooth, controlled material removal in both dental and technical lab settings. The carbide construction ensures long-lasting sharpness and resistance to wear under repeated use. Each unit is made in Germany to rigorous quality standards.

FAQ

What is the ISO classification for this bur? This carbide cylinder flat cutter dental bur is classified under ISO 500 104 110 006 012.

How many burs are included per pack? Each pack contains 6 individual burs, making it cost-effective for laboratory and clinical use.

What shank type does this bur use? It features an HP (handpiece) shank in a long configuration, referenced as US No. 58L.

Compare With

Manufacturer literature: Busch catalogs and product brochures for this line are available in our Busch Burs Catalog Library.