US No. 12 Bur – Busch Wheel Steel, Made in Germany

The US No. 12 is the American number for a wheel bur with a 0.8 mm head (ISO size 008): a thin, wide-diameter cutting disc on an HP shank, made for grooves, slots and flat relief in the laboratory. Busch & Co. manufactures it in Germany as Busch No. 3 008. Every US No. 12 on this page is a genuine Busch instrument and ships from our US warehouse.

Which US No. 12 Do You Need?

US No.	Busch No.	Material	Cut	Shank	Best for	Pack
12	3 008	Steel	Plain-cut	HP	Economical laboratory cutting of acrylics and plaster	6

HP (2.35 mm shank, straight handpiece). See the Busch Bur Size Chart for head and shank dimensions.

Clinical Uses of the US No. 12

Grooves and slots: cutting retention channels, guide grooves and slots in acrylic, wax and plaster.
Relief and trimming: reducing flat areas and thinning material in denture bases and models.
Separation: parting and sectioning in laboratory work where a narrow kerf is wanted.

At 0.8 mm the No. 12 is a wheel sized for laboratory cutting and grooving.

Speed and Technique

Steel wheels are laboratory instruments for the straight handpiece: keep the speed moderate, present the edge squarely, and do not use them on enamel or metal. Maximum recommended speeds for every Busch shape are in our Dental Bur Speed Chart, and reprocessing steps in the Bur Sterilization Guide.

Made in Germany by Busch & Co.

Busch & Co. has manufactured rotary instruments in Engelskirchen, Germany since 1905. Every instrument on this page is a genuine Busch product, precision-ground on a concentric shank under ISO-certified quality management and guaranteed to arrive free of manufacturing defects under our Busch arrival guarantee.

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

FAQ

What is the Busch number for a US 12 bur? Busch No. 3 008 in steel (HP).

What size is a No. 12 bur? The No. 12 has a 0.8 mm head diameter (ISO size 008) on a wheel bur head, ISO wheel shape.

Are Busch No. 12 burs reusable? Yes. Carbide and steel burs are cleaned, disinfected and sterilized between patients and replaced when they dull; the Bur Sterilization Guide gives the validated steps.

Related resources: US Bur Number Finder · Bur Comparison Chart · Speed Chart · Bur Glossary · Nearby sizes: US No. 11 1/2, US No. 13, US No. 14