845KR Rounded-Edge Taper Diamond Bur

Which Busch 845KR Do You Need?

Choose the grit first, then the head size; every active 845KR in the collection is linked once below, and the last three digits of each Busch number are the ISO head size.

Busch 845KR diamonds – FG, medium grit

Busch No.	Pattern or size
845KR 016	ISO size 016 (1.6 mm) · medium grit · FG · pack of 6
845KR 018	ISO size 018 (1.8 mm) · medium grit · FG · pack of 6
845KR 025	ISO size 025 (2.5 mm) · medium grit · FG · pack of 6

Busch 845KR diamonds – FG, fine and extra fine grit

Busch No.	Pattern or size
8845KR 014	ISO size 014 (1.4 mm) · fine grit, red ring · FG · pack of 2
8845KR 016	ISO size 016 (1.6 mm) · fine grit, red ring · FG · pack of 2
8845KR 018	ISO size 018 (1.8 mm) · fine grit, red ring · FG · pack of 2
8845KR 025	ISO size 025 (2.5 mm) · fine grit, red ring · FG · pack of 2
845KREF 016	ISO size 016 (1.6 mm) · extra fine grit, yellow ring · FG · 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 845KR you need:

Medium (standard): Busch No. 845KR for everyday preparation
Fine (red ring): Busch No. 8845KR for refining margins and surfaces
Extra Fine (yellow ring): Busch No. 845KREF for final finishing and polishing preparation

Sizes and Shanks

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

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

Rounded shoulder: a shoulder finish line with a rounded internal angle, ideal for all-ceramic and zirconia crowns.
Tapered axial walls: correct convergence for retention in one pass.
Ceramic-friendly preparation: rounded line angles that reduce stress concentration in the restoration.

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

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

Dental Instruments, Tools, Burs, Diamonds and Polishers Made In Germany

FAQ

What sizes does the Busch 845KR come in? We carry the 845KR in head sizes 014 (1.4 mm), 016 (1.6 mm), 018 (1.8 mm) and 025 (2.5 mm).

What do the numbers in front of 845KR mean? They indicate grit: 845KR with no prefix is medium, 8845KR is fine and 845KREF is extra fine.

Which handpiece does the 845KR fit? Every 845KR on this page has an FG (friction grip, 1.6 mm shank for the high-speed handpiece).

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.