US No. 40 Busch Steel Inverted Cone Bur | Busch No. 2 021 – HP | Pack of 6

The inverted cone steel dental bur from Busch & Co. GmbH is a precision-engineered cutting instrument designed for demanding professional applications. Crafted from high-quality steel, this taper (cone) inverted cutter delivers reliable, controlled material removal across a variety of technical and clinical workflows.

Product Overview

This bur is classified under ISO standard 310 104 010 001 021, ensuring compatibility and consistent performance within internationally recognized tooling systems. As an inverted cone steel dental bur, it features a tapered taper (cone) profile that is ideal for undercutting and precise cavity preparation, making it a trusted choice for professionals who demand accuracy.

Applications

The inverted cone steel dental bur is well-suited for the following dental laboratory applications:

	Plastics Technology — Shaping, trimming and finishing of acrylic dentures and appliances.
	Model Making — Trimming and detailing of plaster and stone models.

Key Features

• Material: Steel construction for durability and consistent cutting performance
• Style: Taper (Cone) Inverted (Cutter)
• ISO Classification: 310 104 010 001 021
• US No. 40 designation
• HP (Handpiece) shank type
• Supplied as a pack of 6

Each inverted cone steel dental bur in this pack is manufactured in Germany, reflecting Busch & Co. GmbH's long-standing commitment to quality craftsmanship and precision 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 is the ISO classification for this bur? This inverted cone steel dental bur is classified as ISO 310 104 010 001 021.

How many burs are included in this pack? This listing includes a pack of 6 burs.

What shank type does this bur use? It uses an HP (Handpiece) shank, compatible with standard HP handpiece systems.