846 Flat-End Taper Diamond Bur – Busch, Made in Germany

Which Busch 846 Do You Need?

Choose the shank and grit first, then the head size; every active 846 in the collection is linked once below, and the last three digits of each Busch number are the ISO head size.

Busch 846 diamonds – FG, coarse grit

Busch No.	Pattern or size
6846 016	ISO size 016 (1.6 mm) · coarse grit, green ring · FG · pack of 6

Busch 846 diamonds – FG, medium grit

Busch No.	Pattern or size
846 012	ISO size 012 (1.2 mm) · medium grit · FG · pack of 6
846 016	ISO size 016 (1.6 mm) · medium grit · FG · pack of 6

Busch 846 diamonds – FG, fine grit

Busch No.	Pattern or size
8846 012	ISO size 012 (1.2 mm) · fine grit, red ring · FG · pack of 2

Busch 846 diamonds – HP (straight handpiece)

Busch No.	Pattern or size
846 025	ISO size 025 (2.5 mm) · medium grit · HP · pack of 2

Choosing a Grit

Busch marks grit with a colored ring and a prefix on the figure number, so you can order the exact 846 you need:

• Coarse (green ring): Busch No. 6846 for rapid reduction
• Medium (standard): Busch No. 846 for everyday preparation
• Fine (red ring): Busch No. 8846 for refining margins and surfaces

Sizes and Shanks

The three-digit size code is the head diameter in tenths of a millimeter (for example, 012 = 1.2 mm).

• HP (2.35 mm shank for the straight handpiece)
• FG (friction grip, 1.6 mm shank for the high-speed handpiece)

See the Busch Bur Size Chart for full dimensions and the Dental Bur Speed Chart for maximum recommended speeds.

Made in Germany by Busch & Co.

Busch & Co. has manufactured rotary instruments in Engelskirchen, Germany since 1905. Each diamond is produced under ISO 13485-certified quality management on a concentric shank for smooth, chatter-free cutting, and is covered by our Busch warranty.

Clinical Use

• Shoulder margins: butt-joint shoulder finish lines on crown preparations.
• Tapered axial walls: building in the correct convergence for crown retention in one pass.
• Occlusal reduction: flat, even reduction of occlusal and incisal surfaces.

Care and Reconditioning

Busch rotary instruments are reusable: clean, disinfect and sterilize them between patients according to the manufacturer’s instructions, and replace a bur once it dulls or shows damage. Our Dental Bur Reprocessing & Sterilization Guide walks through the workflow for carbide, diamond and steel instruments.

Compare With

Related Busch collections: 845 Flat-End Taper Diamond Bur, 847 Flat-End Taper Diamond Bur, 848 Flat-End Taper Diamond Bur, 846KR Rounded-Edge Taper Diamond Bur, and Crown and Bridge Dental Burs. For numbering, sizes and speeds, see the US Bur Number Finder, the Color Coding & ISO Guide and the Dental Bur Speed Chart.

Reference resources: Bur Comparison Chart · Size Chart · Bur Glossary · All Busch Diamond Burs

FAQ

What sizes does the Busch 846 come in? We carry the 846 in head sizes 012 (1.2 mm), 016 (1.6 mm) and 025 (2.5 mm).

What do the numbers in front of 846 mean? They indicate grit: 6846 is coarse, 846 with no prefix is medium and 8846 is fine.

Should I order FG or HP? FG fits the high-speed handpiece used for most clinical preparation. HP fits the straight handpiece used for laboratory work and chairside adjustments.

Can Busch diamonds be reused? Yes. Clean, disinfect and sterilize between patients following the Bur Sterilization Guide, and replace the bur when cutting efficiency drops.