Build Your Own Precision Mini Drill

Finding the right tool for micro-drilling can be expensive and frustrating. This Mini Drill Chuck Adapter allows you to easily build your own custom rotary tool. Designed specifically to fit standard 3.17mm (1/8") motor shafts (such as 540, 550, or 385 motors), the solid brass base slides on smoothly and locks tightly in place using the included set screw and Allen wrench. No slipping, no wobbling—just pure, reliable rotation.

Versatile 0.5-3.2mm Clamping Range

Stop struggling with fixed-size collets. Our versatile 3-jaw chuck design easily adjusts to accommodate a wide variety of micro drill bits, grinding stones, and polishing burs ranging from 0.5mm up to 3.2mm. This makes it the ultimate all-in-one adapter for intricate tasks like drilling circuit boards, carving wood, or detailing resin crafts.

Quick-Change Keyless Design

Keep your workflow moving. The knurled black chuck body provides an excellent grip, allowing you to tighten and loosen drill bits entirely by hand. This keyless operation means you can swap out bits in seconds without hunting for a specialized chuck key, saving you time and frustration during complex DIY projects.