US No. 303 Mandrel – Busch Stainless Steel Mandrel, Made in Germany

The US No. 303 is the American number for a mandrel with a 5 mm head (ISO size 050): a stainless steel carrier that mounts abrasive and polishing discs in the handpiece. Busch & Co. manufactures it in Germany as Busch No. 303RS 050. Every US No. 303 on this page is a genuine Busch instrument and ships from our US warehouse.

Which US No. 303 Do You Need?

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

Clinical Uses of the US No. 303

• Finishing and polishing: carrying abrasive discs for contouring and polishing composite, acrylic and metal.
• Separation: carrying separating discs in the laboratory.

At 5 mm the No. 303 is a head sized for standard dental discs.

Speed and Technique

Fit only discs designed for the mandrel head, seat them fully, and run at the disc manufacturer’s speed; replace a mandrel whose head no longer holds a disc securely. 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.

FAQ

What is the Busch number for the US 303 mandrel? Busch No. 303RS 050 in RA, Busch No. 303RS 050 in HP.

Related resources: US Bur Number Finder · Bur Comparison Chart · Speed Chart · Bur Glossary