Busch® Fig. 446 – 70° Shallow Hart Burs

Description

Precision-Cut Burs for Professional Setting and Jewellery Work

The Busch® Fig. 446 Shallow Hart Bur is a trusted tool for jewellers and stone setters who require clean, accurate bearing cuts. Manufactured in Germany from high-quality tungsten vanadium steel, this 70° bur delivers exceptional durability and reliable performance on precious metals, ensuring sharp, controlled cutting with every use.

Optimal Geometry for Secure Stone Seating

With its 70° shallow hart profile, this bur is ideal for preparing seats for gemstones, adjusting bearings, and refining settings. The geometry allows for precise control when shaping the metal around the stone girdle, supporting secure, professional stone placement.

Engineered for Smooth, Accurate Cutting

Busch burs are known worldwide for their stability, precision, and long working life. Each bur’s teeth are uniformly machined and evenly spaced, resulting in a smooth cutting action with minimal vibration. The stable one-piece design provides exceptional concentricity, improving accuracy and reducing wear on both the bur and the tool.

Consistent Performance Backed by German Manufacturing

Produced by Busch®, a manufacturer established in 1905 and renowned for its high standards, these burs undergo rigorous quality control to deliver outstanding reliability. Whether used in a flex-shaft, micromotor, or pendant drill, the bur maintains balance and cutting efficiency.

Versatile and Practical for Daily Bench Use

Available in diameters from 0.90 mm to 2.90 mm, the Fig. 446 bur covers a wide range of setting needs. Each bur features a 3/32″ (2.34 mm) shank compatible with standard jewellery handpieces. Proper lubrication is recommended to ease cutting, improve surface finish, and extend tool life.