Frank Dental Carpide Polishing Bur - C390

Product name

Product name: Tungsten carbide polishing bur — C390
Brand: Frank Dental
Material type: Tungsten carbide
Shank type: Suitable for use with (314) aerator
Recommended speed: Use at max 300,000 rpm
Origin: Made in Germany

Cutting efficiency and precision

Tungsten carbide (WC-Co) burs deliver high cutting efficiency thanks to hardness and blade geometry. Vibration is minimal, which improves operator control and helps protect patient comfort.

Wear resistance and lifespan

WC-Co alloy burs have superior wear resistance compared with steel and other alloys. They withstand repeated sterilization and keep their edges for a long time.

Heat control and tissue protection

Thanks to high cutting efficiency, isolated heat rise occurs when run at low pressure. This reduces risk of pulp tissue damage. Chip evacuation is optimized.

Material compatibility and multi-purpose use

Can be used across a wide material range such as metal crown materials, composite, and amalgam. Metal-cutting characteristics make some designs especially suited to metal milling.

Geometry and design features

Cutting blade angle, spiral angle, and flute count directly affect bur performance. Aggressive (positive rake) blades provide fast cutting; negative rake or radial-angle designs increase fracture resistance.

Care and use precautions

• Check the bur often; watch for microcracks or edge damage.
• Apply ultrasonic washing and appropriate sterilization protocols.
• At high speeds, avoid maximum pressure; overload shortens service life.
• Choose a flute design that will not block chip flow.

Important note

Tungsten burs tend to break on impact, drops, or knocks. Run without pressing hard, and take care to avoid drops and impacts.

Speed recommendation

Use at max 300,000 rpm.