Busch® Bur Sets - Hart 90° Fig 156C

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Busch® 156C Hart shaped burs are the go to bur for setting. The shape is perfect for cutting seats into prongs and for both channel and flush setting. Also used for designs and diamond or bright cutting in metal. 

Made of tungsten vanadium steel for strength and durability. Features precision machined, uniformly spaced teeth for accurate and smooth cutting. Use with a lubricant such as Gesswein Lube-Stik (see related products) to facilitate cutting and prolong tool life. Cutting angle of the bur is 90°.

The 3/32" shanks measure approximately 1.75" long. Maximum operating speed varies with bur size. Please consult with ANSI (American National Standards Institute) for speed recommendations.

See the charts below to see the five sets and which burs are available in each set. Made in Germany.

Item #121-9510
Set of 12, 007-018
Round fig 156c Set of 6 Hart 90deg burs
Bur Size: 007 008 009 010 011 012 013 014 015 016 017 018
Working Diameter: (mm) 0.70 0.80 0.90 1.00 1.10 1.20 1.30 1.40 1.50 1.60 1.70 1.80
Inner Working Length: (mm) 0.39 0.46 0.52 0.58 0.64 0.69 0.76 0.81 0.88 0.93 0.99 1.04
Item #121-9500
Set of 12, 010-031, Popular Sizes
Round fig 156c Set of 12 Hart 90deg burs
Bur Size: 010 012 014 015 016 018 021 023 025 027 029 031
Working Diameter: (mm) 1.00 1.20 1.40 1.50 1.60 1.80 2.10 2.30 2.50 2.70 2.90 3.10
Inner Working Length: (mm) 0.58 0.69 0.81 0.88 0.93 1.04 1.24 1.34 1.46 1.57 1.70 1.80
Item #121-9515
Set of 12, 019-030
Round fig 156c Set of 6 Hart 90deg burs
Bur Size: 019 020 021 022 023 024 025 026 027 028 029 030
Working Diameter: (mm) 1.90 2.00 2.10 2.20 2.30 2.40 2.50 2.60 2.70 2.80 2.90 3.00
Inner Working Length: (mm) 1.11 1.16 1.24 1.29 1.34 1.40 1.46 1.51 1.57 1.65 1.70 1.75
Item #121-9550
Set of 6, 033-045
Round fig 156c Set of 6 Hart 90deg burs
Bur Size: 033 035 037 040 042 045
Working Diameter: (mm) 3.30 3.50 3.70 4.00 4.20 4.50
Inner Working Length: (mm) 1.95 2.10 2.25 2.45 2.60 2.85
Item #121-9520
Set of 11, 031-070
Round fig 156c Set of 12 Hart 90deg burs
Bur Size: 031 033 035 037 040 042 045 047 050 060 070
Working Diameter: (mm) 3.10 3.30 3.50 3.70 4.00 4.20 4.50 4.70 5.00 6.00 7.00
Inner Working Length: (mm) 1.80 1.95 2.10 2.25 2.45 2.60 2.85 3.00 3.00 3.70 4.40
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