Busch Fig 446AU Carbide 70 Hart Burs 3/32" Shank .90mm-2.30mm By the Piece

These burs cut clean, accurate stone seats in prongs on precious and hard metals. Sold by the piece, Busch Fig 446AU carbide 70 degree hart burs mount on a 3/32" shank, and the sharp carbide blades bite smoothly into the metal for a controlled, predictable feel at the handpiece.

Features

• 70 degree hart profile engineered specifically for cutting prong seats for stone setting
• Carbide construction for extremely long service life compared with steel or tungsten vanadium burs
• Suitable for use on platinum, titanium, steel, and standard gold alloys
• Precision Busch blade geometry provides aggressive yet controllable cutting action
• Calibrated diameter range to match common prong and stone seat dimensions
• 3/32" shank

Available Options

Notes

• Carbide burs offer the longest service life compared with tungsten vanadium and high-speed steel burs.
• Use light, controlled hand pressure and let the bur do the cutting, especially in very hard alloys.
• Other Busch carbide shapes are available separately: Fig 414AU 90 degree hart bur (Part # BAU118.509) and Fig 413AU traditional setting bur (Part # BAU118.808AU).