Description
Set of 24 high speed steel hart (bearing cutter) burs, ranging from 1.1 mm to 8 mm in diameter, in a hinged wood box. 45° cutting angle. 3/32″ shanks. Made in USA.
Bur Basics
Hart (Bearing Cutter) Burs are used to cut seats in prongs, flush settings, & channels. They are available with 45°, 70° or 90° cutting angles. They can also be used for bright cutting.
High Speed Steel (HSS) burs strike a balance between cost and durability. They maintain their hardness (temper) better than vanadium steel and cost less than carbide steel.
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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