Drill Chuck for 555 DC Motor with Coupler

This mini drill chuck is designed to turn a 555 DC motor into a fully functional rotary drilling tool, making it easy to build a compact hand drill, PCB drilling rig, or small workshop tool from a common hobby motor. It features a classic keyed three-jaw chuck design that grips drill bits securely and evenly, giving precise, reliable rotation without slippage even at higher motor speeds. The chuck comes with a matching coupler sized for the standard 3.17mm shaft used on 555 motors, so it mounts directly without needing any additional adapters.

Everything needed to get set up is included in the kit: the coupler, an Allen key for tightening the coupler’s set screw, and a drill chuck key for opening and closing the jaws. Construction is all metal, with the jaws specially treated for strong wear resistance, so the chuck holds its accuracy and grip strength even after repeated bit changes and extended use. Its 0.3-4mm clamping range covers most small twist drill bits, making it versatile enough for fine PCB drilling as well as slightly larger holes in wood, plastic, and soft metals.

This chuck is a popular choice for DIY mini drill press builds, PCB prototyping setups, jewelry and craft drilling, and any hobbyist project where a 555 motor needs to be converted into a precise, bit-driven tool. It’s a simple, low-cost way to add drilling capability to an existing 555 motor without buying a dedicated drill.

Specification:

• Compatible Motor : 555 DC Motor
• Chuck Type : Keyed Three-Jaw Chuck
• Clamping Range : 0.3mm – 4mm
• Coupler Bore : 3.17mm (Standard 555 Shaft)
• Material : Metal
• Included Accessories : Coupler, Allen Key, Chuck Key