Busch & Co. · Collection

Inverted Cone Burs

Inverted cone burs — heads that widen away from the shank — create mechanical undercuts and flat cavity floors that no other shape produces as directly.

The collection spans the Busch No. 2 carbide and steel inverted cone (US No. 34 through 41 in FG, RA and HP), diamonds No. 805, 806, 807 and 812 with their 68xx coarse grits, COOL DIAMANT CD 09, 12 and 15, Shorties carbide cutters No. 420 and 422, and inverted cone abrasives No. 609, 613 and Cera-Plus CP613/CP728.

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From amalgam retention features to flattening a pulpal floor, the inverted cone remains a daily instrument, and Busch manufactures it across every material class with identical German tolerances.

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Since 1905 · ISO 13485 · Made in GermanyShips from the US
Inverted Cone Burs
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Guides & charts for this collection

Reference pages already linked from this collection, in one place.

ChartDental Bur Speed ChartCare guideDental Bur Reprocessing & Sterilization GuideChartBur Comparison ChartGlossaryDental Bur GlossaryGuideColor Coding & ISO Guide

Which Inverted Cone Bur Do You Need?

Chairside, the FG carbide No. 2 (US 34–38) is the undercut and cavity-floor instrument, and the FG diamonds (805–807 medium, 68xx coarse) and COOL DIAMANT figures cover crown and bridge work; the HP carbide, steel, Shorties, diamond and abrasive figures are the laboratory versions for the straight handpiece.

Carbide burs – FG and RA (7)7 items
Busch No. Pattern or size
2 007 Carbide Inverted Cone Bur, 0.7 mm, FG, pack of 6
2 008 US No. 34 – Carbide Inverted Cone Bur, 0.8 mm, FG, pack of 6
2 010 US No. 35 – Carbide Inverted Cone Bur, 1 mm, FG, pack of 6
2 012 US No. 36 – Carbide Inverted Cone Bur, 1.2 mm, FG, pack of 6
2 012 US No. 36 – Carbide Inverted Cone Bur, 1.2 mm, RA, pack of 6
2 014 US No. 37 – Carbide Inverted Cone Bur, 1.4 mm, FG, pack of 6
2 016 US No. 38 – Carbide Inverted Cone Bur, 1.6 mm, FG, pack of 6
Diamond burs – FG (18)18 items
Busch No. Pattern or size
6805 012 Diamond Inverted Cone Bur, 1.2 mm, coarse grit, green ring, FG, pack of 6
6805 014 Diamond Inverted Cone Bur, 1.4 mm, coarse grit, green ring, FG, pack of 6
6805 016 Diamond Inverted Cone Bur, 1.6 mm, coarse grit, green ring, FG, pack of 6
6806 012 Diamond Inverted Cone Bur, 1.2 mm, coarse grit, green ring, FG, pack of 6
6806 014 Diamond Inverted Cone Bur, 1.4 mm, coarse grit, green ring, FG, pack of 6
6806 016 Diamond Inverted Cone Bur, 1.6 mm, coarse grit, green ring, FG, pack of 6
805 010 Diamond Inverted Cone Bur, 1 mm, medium grit, FG, pack of 6
805 012 Diamond Inverted Cone Bur, 1.2 mm, medium grit, FG, pack of 6
805 014 Diamond Inverted Cone Bur, 1.4 mm, medium grit, FG, pack of 6
805 016 Diamond Inverted Cone Bur, 1.6 mm, medium grit, FG, pack of 6
805 018 Diamond Inverted Cone Bur, 1.8 mm, medium grit, FG, pack of 6
806 010 Diamond Inverted Cone Bur, 1 mm, medium grit, FG, pack of 6
806 012 Diamond Inverted Cone Bur, 1.2 mm, medium grit, FG, pack of 6
806 014 Diamond Inverted Cone Bur, 1.4 mm, medium grit, FG, pack of 6
806 016 Diamond Inverted Cone Bur, 1.6 mm, medium grit, FG, pack of 6
806 018 Diamond Inverted Cone Bur, 1.8 mm, medium grit, FG, pack of 6
807 012 Diamond Inverted Cone Bur, 1.2 mm, medium grit, FG, pack of 6
807 016 Diamond Inverted Cone Bur, 1.6 mm, medium grit, FG, pack of 6
COOL DIAMANT low-heat diamonds (4)4 items
Busch No. Pattern or size
CD 09 012 Cool-Diamant Inverted Cone Bur, 1.2 mm, FG, pack of 6
CD 12 016 Cool-Diamant Inverted Cone Bur, 1.6 mm, FG, pack of 6
CD 12 018 Cool-Diamant Inverted Cone Bur, 1.8 mm, FG, pack of 6
CD 15 016 Cool-Diamant Inverted Cone Bur, 1.6 mm, FG, pack of 6
Carbide burs – HP (laboratory) (8)8 items
Busch No. Pattern or size
2 007 Carbide Inverted Cone Bur, 0.7 mm, HP, pack of 6
2 008 US No. 34 – Carbide Inverted Cone Bur, 0.8 mm, HP, pack of 6
2 010 US No. 35 – Carbide Inverted Cone Bur, 1 mm, HP, pack of 6
2 012 US No. 36 – Carbide Inverted Cone Bur, 1.2 mm, HP, pack of 6
2 014 US No. 37 – Carbide Inverted Cone Bur, 1.4 mm, HP, pack of 6
2 016 US No. 38 – Carbide Inverted Cone Bur, 1.6 mm, HP, pack of 6
2 018 US No. 39 – Carbide Inverted Cone Bur, 1.8 mm, HP, pack of 6
2 023 US No. 41 – Carbide Inverted Cone Bur, 2.3 mm, HP, pack of 6
Steel burs – HP (laboratory) (9)9 items
Busch No. Pattern or size
2 007 Steel Inverted Cone Bur, 0.7 mm, HP, pack of 6
2 008 US No. 34 – Steel Inverted Cone Bur, 0.8 mm, HP, pack of 6
2 010 US No. 35 – Steel Inverted Cone Bur, 1 mm, HP, pack of 6
2 012 US No. 36 – Steel Inverted Cone Bur, 1.2 mm, HP, pack of 6
2 014 US No. 37 – Steel Inverted Cone Bur, 1.4 mm, HP, pack of 6
2 016 US No. 38 – Steel Inverted Cone Bur, 1.6 mm, HP, pack of 6
2 018 US No. 39 – Steel Inverted Cone Bur, 1.8 mm, HP, pack of 6
2 021 US No. 40 – Steel Inverted Cone Bur, 2.1 mm, HP, pack of 6
2 023 US No. 41 – Steel Inverted Cone Bur, 2.3 mm, HP, pack of 6
Shorties carbide cutters – HP (laboratory) (7)7 items
Busch No. Pattern or size
S 420FFX 018 Shorties Carbide Inverted Cone Bur, 1.8 mm, HP, pack of 2
S 420FX 018 Shorties Carbide Inverted Cone Bur, 1.8 mm, HP, pack of 2
S 422FFX 023 Shorties Carbide Inverted Cone Bur, 2.3 mm, HP, pack of 2
S 422FX 014 Shorties Carbide Inverted Cone Bur, 1.4 mm, HP, pack of 2
S 422FX 023 Shorties Carbide Inverted Cone Bur, 2.3 mm, HP, pack of 2
S 422X 014 Shorties Carbide Inverted Cone Bur, 1.4 mm, HP, pack of 2
S 422X 023 Shorties Carbide Inverted Cone Bur, 2.3 mm, HP, pack of 2
Diamond burs – HP (laboratory) (9)9 items
Busch No. Pattern or size
805 012 Diamond Inverted Cone Bur, 1.2 mm, medium grit, HP, pack of 2
805 014 Diamond Inverted Cone Bur, 1.4 mm, medium grit, HP, pack of 2
805 016 Diamond Inverted Cone Bur, 1.6 mm, medium grit, HP, pack of 2
805 018 Diamond Inverted Cone Bur, 1.8 mm, medium grit, HP, pack of 2
805 021 Diamond Inverted Cone Bur, 2.1 mm, medium grit, HP, pack of 2
805 023 Diamond Inverted Cone Bur, 2.3 mm, medium grit, HP, pack of 2
807 016 Diamond Inverted Cone Bur, 1.6 mm, medium grit, HP, pack of 2
807 023 Diamond Inverted Cone Bur, 2.3 mm, medium grit, HP, pack of 2
812 055 Diamond Inverted Cone Bur, 5.5 mm, medium grit, HP, pack of 1
Abrasives (laboratory) (5)5 items
Busch No. Pattern or size
609 060 Inverted Cone Abrasive, 6 mm, pink, HP, pack of 6
613 065 Inverted Cone Abrasive, 6.5 mm, green, HP, pack of 6
613 065 Inverted Cone Abrasive, 6.5 mm, pink, HP, pack of 6
CP613 065 Cera-Plus Inverted Cone Abrasive, 6.5 mm, fine grit, HP, pack of 6
CP728 170 Cera-Plus Inverted Cone Abrasive, 17 mm, fine grit, HP, pack of 6

Clinical Use

The widening head cuts an undercut at the base of a preparation for mechanical retention of amalgam and flattens a pulpal or gingival floor in one pass; the smaller FG sizes also remove thin, unsupported enamel at the cavosurface margin.

Carbides cut enamel and dentine at high speed with water spray, diamonds are preferred for ceramic and crown reduction, and the steel and HP figures are used dry or with light coolant on plaster, acrylic and alloy in the laboratory; see our Dental Bur Speed Chart for the speed range of each shank.

Care and Reconditioning

Busch rotary instruments are reusable: clean, disinfect and sterilize them between patients according to the manufacturer’s instructions. Our Dental Bur Reprocessing & Sterilization Guide walks through the workflow for carbide, diamond and steel instruments.

Compare With

Round Dental Burs | Rosehead Shape · Pear Shaped Dental Burs · Cylinder Round Dental Burs · Dental Carbide Bur Collection · Busch SHORTIE Carbide Bur Collection · Bur Comparison Chart · Dental Bur Glossary

Reference resources: Bur Comparison Chart · Speed Chart · Color Coding & ISO Guide · Glossary

Dental Instruments, Tools, Burs, Diamonds and Polishers Made In Germany

FAQ

What is an inverted cone bur used for?

Creating undercuts for mechanical retention, flattening cavity floors, and removing thin defective enamel at the cavosurface.

Which sizes are available?

US numbers 34 through 41 (Busch No. 2, ISO 007–023) in carbide and steel, with FG, RA and HP shanks depending on figure; diamonds run from ISO 010 to 055.

Where are these burs made?

Every instrument in this collection is manufactured by Busch & Co. in Engelskirchen, Germany — an ISO 13485-certified specialist in rotary precision instruments since 1905 — and ships fast from our US warehouse.

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Made in Germany, shipped from the US
Busch & Co. has been making burs in Germany since 1905, under ISO 13485.

  • Fast & Secure Shipping

    Fast and secure delivery from Germany and our US warehouse to your door.

  • Manufactured in Germany

    Crafted by skilled professionals in Germany for unmatched longevity.

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    Preferred and trusted by dental professionals across the globe.

  • Legacy of Excellence

    A tradition of innovation and craftsmanship since 1905 (Busch) and 1921 (Zepf).

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