Amann Girrbach CVD Diamond Zirconia Milling Burs

CVD Diamond Zirconia Milling Burs for Ceramill Mills

Eagle CVD diamond zirconia milling burs are replacement tools compatible with Amann Girrbach Ceramill milling units. They are made for one job: milling pre-sintered zirconia crowns, bridges and frameworks with clean margins and a consistent surface. Each diameter (0.3, 0.6, 1.0 and 2.5 mm) is a separate option, so you can replace only the tool position that is worn.

Why a CVD Diamond Coating for Zirconia

Pre-sintered zirconia is easy to cut but very abrasive, and an uncoated carbide edge dulls quickly in it. CVD (chemical vapor deposition) grows a true crystalline diamond layer on the bur, not DLC (diamond-like carbon), so the cutting edge resists that abrasion and keeps its shape across your zirconia jobs. That is why these burs should be kept for zirconia only and not used for soft materials such as PMMA or wax.

Sizes and What Each One Does

How to Read the Sizes

The number on each option is the cutting diameter in millimeters. Your Ceramill CAM software assigns each diameter to a tool position in the milling strategy, so a worn 0.6 mm bur can only be replaced by another 0.6 mm bur. Before you order, check the tool list in your software to see which positions are close to the end of their tool life, and order those diameters.

Compatibility

These burs are compatible with Amann Girrbach Ceramill milling units. Ceramill units do not all use the same collet and shank size, so before you order, check the collet size and the tool table of your machine and make sure they match these burs.

These are Eagle-brand burs made to fit Ceramill mills; they are not original Amann Girrbach tools. Register each new bur in your software as you would any replacement tool and reset its usage time.

When to Replace a Zirconia Milling Bur

Bur life depends on the zirconia type, blank height, milling strategy and how much fine detail each job has, so there is no fixed unit count. Replace the bur when you notice:

• Rougher surfaces or visible tool marks on milled restorations
• Chipped or uneven margins
• Milling times longer than your software estimates
• Poorer fit of crowns and frameworks after sintering
• A dull tip, worn coating or chipped edge
• A tool-life warning in your milling software

The 0.3 mm bur is the most delicate tool in the set, so keeping a spare on hand helps you avoid stopping a job halfway.

Tips for Longer Bur Life and Better Surfaces

• Use these burs only for zirconia and keep a separate set of uncoated burs for PMMA, wax and PEEK.
• Use the milling strategy recommended for your zirconia blank and blank height.
• Vacuum zirconia dust from collets, tool holders and the milling chamber regularly; dust in the collet affects how the bur seats.
• Insert each bur straight, to the depth your machine requires, without forcing it at an angle.
• Store spare burs in their packaging and never reuse a bur that was dropped.
• If margins chip right after a bur change, run your machine calibration before blaming the new tool.

Common Problems and Bur-Related Causes

• Broken 0.3 or 0.6 mm bur: a worn tool kept in use, a bur not seated straight, dust in the collet or a strategy that does not suit the blank.
• Chipped margins: a worn or chipped detail bur.
• Steps or rough areas: a dull bur or the wrong diameter in a tool position.
• Poor fit after sintering: worn burs on inner surfaces; also check calibration and shrinkage settings.

Milling soft materials on the same unit? Use our uncoated Ceramill-compatible milling burs for PMMA, wax and PEEK. For other mills, see all zirconia milling burs.