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Busch 70° Hart Vanadium Burs

Busch 70° Hart Vanadium Burs

Item #
331-446-GRP

Starting at $3.25

Vanadium steel hart (bearing cutter) burs with 70° cutting angle made in Germany by Busch®. 3/32" shanks.

Grouped product items Grouped product items
Item # Diameter Price Qty
331-446-010
1 mm
$3.25
each
  • $2.60 (6 or more)
  • $2.28 (36 or more)
+
331-446-012
1.2 mm
$3.25
each
  • $2.60 (6 or more)
  • $2.28 (36 or more)
+
331-446-014
1.4 mm
$3.25
each
  • $2.60 (6 or more)
  • $2.28 (36 or more)
+
331-446-016
1.6 mm
$3.25
each
  • $2.60 (6 or more)
  • $2.28 (36 or more)
+
331-446-018
1.8 mm
$3.25
each
  • $2.60 (6 or more)
  • $2.28 (36 or more)
+
331-446-021
2.1 mm
$3.25
each
  • $2.60 (6 or more)
  • $2.28 (36 or more)
+
331-446-023
2.3 mm
$3.25
each
  • $2.60 (6 or more)
  • $2.28 (36 or more)
+
331-446-025
2.5 mm
$4.88
each
  • $3.90 (6 or more)
  • $3.42 (36 or more)
+
331-446-027
2.7 mm
$4.88
each
  • $3.90 (6 or more)
  • $3.42 (36 or more)
+
331-446-029
2.9 mm
$4.88
each
  • $3.90 (6 or more)
  • $3.42 (36 or more)
+
331-446-031
3.1 mm
$5.88
each
  • $4.70 (6 or more)
  • $4.12 (36 or more)
+
331-446-033
3.3 mm
$5.88
each
  • $4.70 (6 or more)
  • $4.12 (36 or more)
+
331-446-035
3.5 mm
$5.88
each
  • $4.70 (6 or more)
  • $4.12 (36 or more)
+
331-446-037
3.7 mm
$5.88
each
  • $4.70 (6 or more)
  • $4.12 (36 or more)
+
331-446-040
4.0 mm
$7.66
each
  • $6.13 (6 or more)
  • $5.36 (36 or more)
+

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.

Vanadium Steel burs are economically priced. They cut precisely when new, but don't retain their sharpness as long as other steel alloys. They're used at low 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.