Round carbide burs in FG, RA and RAOS surgical long-neck shanks
6-blade round carbide burs size table
FG1/4 round carbide bur friction grip FG shank
FG4 round carbide bur friction grip FG shank
FG5 round carbide bur friction grip FG shank
FG6 round carbide bur friction grip FG shank
FG7 round carbide bur friction grip FG shank
FG8 round carbide bur friction grip FG shank
RA1/4 round carbide bur latch type RA shank
RA2 round carbide bur latch type RA shank
RA1/2 round carbide bur latch type RA shank
RA1 round carbide bur latch type RA shank
RA3 round carbide bur latch type RA shank
RA4 round carbide bur latch type RA shank
RA5 round carbide bur latch type RA shank
RA6 round carbide bur latch type RA shank
RA7 round carbide bur latch type RA shank
RA8 round carbide bur latch type RA shank
RA330 pear-shaped carbide bur latch type RA shank
RA3OS surgical long-neck round carbide bur RA latch shank
RA6OS surgical long-neck round carbide bur RA latch shank
RA8OS surgical long-neck round carbide bur RA latch shank
RA2OS surgical long-neck round carbide bur RA latch shank
RA4OS surgical long-neck round carbide bur RA latch shank

Round carbide burs FG/RA/RAOS

$15.90
Excellent 100+ reviews
Specification
Head Size:

005

Head Length:

0.4

Round carbide burs FG/RA/RAOS

Round Carbide Burs for Caries Excavation, Access and Surgery

One-piece tungsten carbide round burs with 6 blades, in three shanks: FG friction grip (sizes 1/4, 4-8), RA latch type (sizes 1/4-8 and 330) and RAOS surgical long neck (sizes 2, 3, 4, 6, 8).

Each pack contains 5 burs of one size. Rust-resistant and made in Israel.

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Related products

Round Carbide Burs in FG, RA and Surgical Long-Neck Shanks

Eagle round carbide burs are one-piece tungsten carbide burs with 6 blades, offered in three shank types: FG (friction grip) for high-speed handpieces, RA latch type for slow-speed contra-angles, and RAOS surgical long-neck burs for extra reach. Sizes run from 1/4 to 8 (ISO 005 to 023), plus an RA 330, so you can keep one familiar shape for everything from caries excavation to surgical bone work. Each pack contains 5 burs.

Round Bur Uses in Dentistry

  • Caries excavation and removal of soft, decayed dentin
  • Opening and enlarging access cavities, including endodontic access
  • Cavity preparation and refining the internal form of a preparation
  • Placing starting points before switching to a fissure bur
  • RAOS long neck: bone removal and tooth sectioning in oral surgery, where a longer neck improves reach and visibility

FG vs RA vs RAOS: Which Shank Do You Need?

  • FG (friction grip): 1.6 mm shank for high-speed handpieces. Fast cutting for access openings and cavity preparation. Sizes FG1/4, FG4, FG5, FG6, FG7 and FG8.
  • RA (latch type): 2.35 mm latch shank for slow-speed contra-angle handpieces, with more tactile control for caries excavation. Sizes RA1/4 to RA8, plus RA330. If you only need the latch version, see our RA round burs.
  • RAOS (surgical long neck): latch-type shank with a longer neck for slow-speed contra-angles, for surgical access, bone work and tooth sectioning. Sizes RA2OS, RA3OS, RA4OS, RA6OS and RA8OS.

Round Bur Size Chart

Round bur numbers follow standard US sizing. The matching ISO number gives the head diameter in tenths of a millimeter.

  • 1/4 – ISO 005, about 0.5 mm head (FG, RA)
  • 1/2 – ISO 006, about 0.6 mm head (RA)
  • 1 – ISO 008, about 0.8 mm head (RA)
  • 2 – ISO 010, about 1.0 mm head (RA, RAOS)
  • 3 – ISO 012, about 1.2 mm head (RA, RAOS)
  • 4 – ISO 014, about 1.4 mm head (FG, RA, RAOS)
  • 5 – ISO 016, about 1.6 mm head (FG, RA)
  • 6 – ISO 018, about 1.8 mm head (FG, RA, RAOS)
  • 7 – ISO 021, about 2.1 mm head (FG, RA)
  • 8 – ISO 023, about 2.3 mm head (FG, RA, RAOS)
  • 330 – pear-shaped carbide bur on an RA shank, listed here for convenience

How to Choose a Round Bur

Most clinicians keep a few sizes on hand: smaller sizes (1/4 to 2) for narrow areas and fine detail, mid sizes (3 to 6) for general excavation and access, and larger sizes (7 and 8) for removing bigger volumes of decay. Pick the shank that matches your handpiece, then the size that matches the job.

What Size Round Bur for an Access Cavity?

Endodontic teaching protocols commonly describe a No. 2 or No. 4 round bur for entering the pulp chamber - No. 4 for the initial entry on anterior teeth and No. 2 to clean out pulp horns - with larger sizes used in bigger posterior chambers. Choose according to tooth size and your own protocol.

Caries Excavation

For deep dentin, a larger RA round bur at slow speed gives the most tactile control; work from the periphery toward the pulp with light, sweeping strokes.

Surgical Round Burs: RAOS Long Neck

The RAOS surgical round bur keeps the same round head on a longer neck, so the handpiece head stays clear of the field when you remove bone or section a tooth. Use it in a slow-speed surgical contra-angle with copious irrigation, following your surgical protocol.

Carbide vs Diamond Round Burs

A carbide round bur cuts with blades and is the classic choice for excavating dentin and cutting bone. A round diamond bur abrades rather than cuts and is usually chosen for enamel and ceramics. This page offers tungsten carbide round burs only.

How to Use a Round Carbide Bur

  • Seat the bur fully in the handpiece and run it at the speed recommended by the handpiece and bur manufacturer.
  • Use water spray for cavity and access work, and irrigation for surgical use.
  • Apply light pressure with intermittent strokes, and keep the bur moving.
  • Change to a new bur as soon as cutting slows.

Cleaning, Sterilization and Reuse

These tungsten carbide burs are rust-resistant and designed to withstand repeated autoclave cycles. Before each use, pre-soak in a disinfectant suitable for carbide burs, clean ultrasonically in a bur holder, rinse, dry, pouch and autoclave. Avoid cold sterilizing solutions and hydrogen peroxide, which can degrade tungsten carbide. Discard burs with chipped blades, corrosion or a bent shank.

Specifications

  • Material: one-piece tungsten carbide
  • Blades: 6
  • Head shape: round (330: pear)
  • Shanks: FG friction grip, RA latch type, RAOS surgical long neck
  • Sterilization: rust-resistant, designed to withstand repeated autoclave cycles
  • Pack size: 5 burs per pack
  • Origin: made in Israel

For fissure, pear and finishing shapes, browse our full range of carbide burs.

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