Johnson Tools Hart Burs are high-precision rotary tools crafted for diamond and gemstone setting work in fine jewelry. Designed with a 45° angle and ultra-sharp flutes, these burs provide clean seating for stones in claw, bezel, pave, and flush settings. The 2.35mm shank fits most handpieces and rotary machines, ensuring smooth operation. Available in multiple sizes from 7 No. (0.7mm) to 40 No. (4.0mm), each bur is manufactured to professional standards for long-lasting durability. Ideal for jewelers, watchmakers, and precision craftspeople working with gold, silver, brass, and platinum.
Precision hart bur with 45° cone shape for professional diamond and stone setting
Available in sizes 8no. (0.8mm) to 23no (2.3mm) – ideal for solitaire, pave, flush, and bezel settings
Standard 2.35mm shank compatible with most rotary tools and micromotors
Sharp flutes ensure clean cuts and smooth seating for gemstones
Made for jewelers, engravers, and stone setters working in gold, silver, platinum, or brass
