Busch Carbide 90 Hart Burs Fig 414AU 3/32" Shank .90mm-2.30mm By the Piece

Sold by the Piece-These Busch 414AU carbide 90 degree hart burs can be used for the second step of pave setting in hard metals. After using the Carbide twist drill 4205S to drill the starter holes in the first step of the process, use the appropriate size Carbide round bur 1AU to enlarge the hole. This creates a secure mount for the rondiste of the gem to be set. Cutting in difficult to reach corner areas and also a fine refinishing can be done with the small diameter 0.4mm bur.

Burs made of carbide are the longest lasting burs we sell, outlasting both tungsten vanadium burs and high-speed burs. Use them on the toughest metals including platinum, titanium and even steel, or use them instead of your regular burs for extremely long service life on normal gold alloys. You will find them cheaper to use than your regular burs, since they will last so much longer. These Busch carbide burs are made in Germany using state-of-the-art manufacturing techniques to give these round burs a powerful blade geometry of the kind normally only found on steel tools. All shanks are 3/32". Recommended speed: 2,000-10,000 r.p.m.

Choose from 15 sizes. Sold by the Piece:

• BAU118.509  0.90mm
• BAU118.510  1.00mm
• BAU118.511  1.10mm
• BAU118.512  1.20mm
• BAU118.513  1.30mm
• BAU118.514  1.40mm
• BAU118.515  1.50mm
• BAU118.516  1.60mm
• BAU118.517  1.70mm
• BAU118.518  1.80mm
• BAU118.519  1.90mm
• BAU118.520  2.00mm
• BAU118.521  2.10mm
• BAU118.522  2.20mm
• BAU118.523  2.30mm