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Round burs enlarge a drilled hole and cut a secure seat for the rondelle of the stone, the second step in pavé setting. Busch Fig. 1AU carbide round burs are built for that job: used after a 4205S carbide twist drill, they deliver clean, controlled cutting even in the toughest metals. Solid carbide construction and a powerful blade geometry suit them to platinum, titanium, steel, and hard alloys, and the 3/32 in. (2.35 mm) shank fits standard flex shaft and micromotor handpieces. Sold individually in sizes from 0.30 mm to 3.50 mm.
| Part # | Bur Size |
|---|---|
| BAU118.173 | 0.30 mm (0.012 in.) |
| BAU118.174 | 0.40 mm (0.016 in.) |
| BAU118.175 | 0.50 mm (0.020 in.) |
| BAU118.176 | 0.60 mm (0.024 in.) |
| BAU118.177 | 0.70 mm (0.028 in.) |
| BAU118.178 | 0.80 mm (0.031 in.) |
| BAU118.179 | 0.90 mm (0.035 in.) |
| BAU118.180 | 1.00 mm (0.039 in.) |
| BAU118.181 | 1.10 mm (0.043 in.) |
| BAU118.182 | 1.20 mm (0.047 in.) |
| BAU118.183 | 1.30 mm (0.051 in.) |
| BAU118.184 | 1.40 mm (0.055 in.) |
| BAU118.185 | 1.50 mm (0.059 in.) |
| BAU118.186 | 1.60 mm (0.063 in.) |
| BAU118.187 | 1.70 mm (0.067 in.) |
| BAU118.188 | 1.80 mm (0.071 in.) |
| BAU118.189 | 1.90 mm (0.075 in.) |
| BAU118.190 | 2.00 mm (0.079 in.) |
| BAU118.191 | 2.10 mm (0.083 in.) |
| BAU118.192 | 2.20 mm (0.087 in.) |
| BAU118.193 | 2.30 mm (0.091 in.) |
| BAU118.194 | 2.40 mm (0.094 in.) |
| BAU118.195 | 2.50 mm (0.098 in.) |
| BAU118.196 | 2.60 mm (0.102 in.) |
| BAU118.197 | 2.70 mm (0.106 in.) |
| BAU118.198 | 2.80 mm (0.110 in.) |
| BAU118.199 | 2.90 mm (0.114 in.) |
| BAU118.200 | 3.00 mm (0.118 in.) |
| BAU118.201 | 3.10 mm (0.122 in.) |
| BAU118.205 | 3.50 mm (0.138 in.) |
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