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Helvetica Swiss Cup Bur Set

Helvetica Swiss Cup Bur Set

Vanadium Steel

3/32" shanks.

The Basics

  • Cup Burs have cutting flutes on the inside of their cup-shaped heads for rounding wire ends and refining prong tips and rivet heads. Because they tends to clog easily, they should always be used with lubrication.
  • Vanadium Steel burs and drills are economically priced. They cut precisely when new, but lose their sharpness faster than hss and carbide steel. They are used at lower speeds.
  • 3/32" dia. shanks are the jeweler's preferred standard for burs and small rotary tools. They fit the adjustable chucks found on most flexshaft handpieces as well as 3/32" handpiece collets.
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