US No. 56 Busch Carbide Straight Fissure (Cylinder) Bur | Busch No. 21 009 – HP | Pack of 6

The carbide cylinder flat cutter bur from Busch & Co. GmbH is a precision-engineered rotary cutting instrument designed for demanding material removal and shaping tasks across multiple disciplines. Identified as item 21 009 (US No. 56), this cylinder flat carbide cutter meets the ISO standard classification 500 104 107 006 009, ensuring consistent geometry and performance.

Product Overview

This carbide cylinder flat cutter bur features a flat-ended cylindrical cutting head manufactured from high-grade carbide. The carbide construction delivers exceptional hardness and wear resistance, making it suitable for precise, controlled cutting and finishing operations. Each pack contains 6 burs, providing reliable supply for both laboratory and clinical workflows.

Applications

The carbide cylinder flat cutter 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.

Key Features

• ISO Classification: 500 104 107 006 009
• Cylinder flat geometry for defined, flat-bottom cuts
• High-grade carbide construction for durability and longevity
• Pack of 6 for uninterrupted workflow
• Made in Germany to exacting quality standards

As a trusted carbide cylinder flat cutter bur, this instrument reflects Busch & Co. GmbH's long-standing commitment to precision and quality manufacturing. Whether used in dental laboratory, model-making, or plastics applications, the carbide cylinder flat cutter bur delivers consistent cutting performance backed by German engineering.

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.

FAQ

What handpieces are compatible with this instrument? It has an HP (2.35 mm straight) shank, which fits standard laboratory and slow-speed straight handpieces.

How many are included per pack? Each pack contains 6 burs.

Where is this instrument made? It is manufactured by Busch & Co. in Engelskirchen, Germany, an ISO 13485-certified specialist in rotary precision instruments since 1905.

Compare With

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