Busch 4203 4 Groove Carbide Twist Drills on 3/32" Shanks .70mm to 2.30mm

The Busch 4203 series carbide twist drills feature a 4-groove design optimized for cutting softer organic materials such as coral and pearls. Mounted on 3/32" shanks, these drills are available in 13 sizes ranging from 0.70mm to 2.30mm, making them a versatile addition to any jeweler's or craftsperson's drill collection. Sold individually, each drill delivers outstanding service life when used correctly.

For best results and longest tool life, use these drills in a drill press. As with any drill, excess leverage or canting can cause breakage. When working freehand, operate within the recommended speed range. These drills are not suitable for glass, ceramics, or gemstones.

Features

• 4-groove carbide construction engineered for softer materials including coral and pearls
• Outstanding service life compared to standard twist drills
• 3/32" shank fits standard flex shaft handpieces and drill presses
• 13 sizes available from 0.70mm to 2.30mm
• Sold by the piece — select only the size you need

Specifications

Available Options

Notes

• Use a starting guide hole when drilling freehand to improve accuracy and reduce breakage risk.
• Drill press use is recommended for maximum tool longevity.
• Avoid excess lateral pressure or canting, which can cause breakage.
• Not for use with glass, ceramics, or gemstones.

California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.