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Busch 70° Hart Burs

Busch 70° Hart Burs

Vanadium Steel

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

The 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.
Item No. Image Diameter Price Qty
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331-446-010 Hart (70°) Bur, Busch 1 mm dia. 1 mm
$3.25
  • (6 or more) $2.60
  • (36 or more) $2.28
331-446-012 Hart (70°) Bur, Busch 1.2 mm dia. 1.2 mm
$3.25
  • (6 or more) $2.60
  • (36 or more) $2.28
331-446-014 Hart (70°) Bur, Busch 1.4 mm dia. 1.4 mm
$3.25
  • (6 or more) $2.60
  • (36 or more) $2.28
331-446-016 Hart (70°) Bur, Busch 1.6 mm dia. 1.6 mm
$3.25
  • (6 or more) $2.60
  • (36 or more) $2.28
331-446-018 Hart (70°) Bur, Busch 1.8 mm dia. 1.8 mm
$3.25
  • (6 or more) $2.60
  • (36 or more) $2.28
331-446-021 Hart (70°) Bur, Busch 2.1 mm dia. 2.1 mm
$3.25
  • (6 or more) $2.60
  • (36 or more) $2.28
331-446-023 Hart (70°) Bur, Busch 2.3 mm dia. 2.3 mm
$3.25
  • (6 or more) $2.60
  • (36 or more) $2.28
331-446-025 Hart (70°) Bur, Busch 2.5 mm dia. 2.5 mm
$4.88
  • (6 or more) $3.90
  • (36 or more) $3.42
331-446-027 Hart (70°) Bur, Busch 2.7 mm dia. 2.7 mm
$4.88
  • (6 or more) $3.90
  • (36 or more) $3.42
331-446-029 Hart (70°) Bur, Busch 2.9 mm dia. 2.9 mm
$4.88
  • (6 or more) $3.90
  • (36 or more) $3.42
331-446-031 Hart (70°) Bur, Busch 3.1 mm dia. 3.1 mm
$5.88
  • (6 or more) $4.70
  • (36 or more) $4.12
331-446-033 Hart (70°) Bur, Busch 3.3 mm dia. 3.3 mm
$5.88
  • (6 or more) $4.70
  • (36 or more) $4.12
331-446-035 Hart (70°) Bur, Busch 3.5 mm dia. 3.5 mm
$5.88
  • (6 or more) $4.70
  • (36 or more) $4.12
331-446-037 Hart (70°) Bur, Busch 3.7 mm dia. 3.7 mm
$5.88
  • (6 or more) $4.70
  • (36 or more) $4.12
331-446-040 Hart (70°) Bur, Busch 4 mm dia. 4.0 mm
$7.66
  • (6 or more) $6.13
  • (36 or more) $5.36