The 17 Degree Burs-Standard Fine Cut

The 17 Degree Bur – Standard Fine Cut is a specialty cone-shaped bur made exclusively for Otto Frei, engineered to solve one of the most common fitting challenges in stone setting work. Standard tapered prong and bezel settings have a natural taper that rarely matches a straight-drilled hole, requiring time-consuming hand filing to achieve a proper seat. This bur eliminates that extra step.

Ground to a precise 17-degree angle, this bur creates a perfectly matched recess for most standard tapered settings in a single operation. The result is a clean, accurate fit with no rocking, no gaps, and no need for secondary correction. It mounts on a standard 3/32" shank, making it compatible with most flex shafts and rotary handpieces used at the bench.

Please note: Otto Frei is currently working with a new manufacturer to produce the 17 Degree Bur, as the original vendor is no longer in business. A new version is expected to be available in late 2026. To be notified when stock is available, please add this product to your wish list.

Features

• Precision 17-degree cone angle matches the taper on most standard prong and bezel settings
• Eliminates the need to hand-file a straight-drilled hole to match a tapered setting
• Standard fine cut for controlled material removal and a clean finished seat
• Made of Tungsten Vanadium for durability and consistent cutting performance
• Fits standard 3/32" shank handpieces and flex shafts
• Produced exclusively for Otto Frei

Specifications

California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.