3.17mm (1/8") Mini Brass Drill Chuck Shaft Arbor Adapter for Dremel, Foredom & Rotary Tools

The 3.17mm (1/8") Mini Brass Drill Chuck Shaft Arbor Adapter is a precision lathe-turned brass coupling adapter engineered to connect mini brass collet chucks to standard 3.17mm (1/8") motor shafts and rotary tool spindles.

Key Features

• Universal 3.17mm (1/8") Motor Fit: Specifically machined for standard 1/8" (3.17mm) motor shafts found on Dremel tools, WEN rotary tools, Foredom flex-shaft systems, and hobby benchtop spindles.
• Concentric Lathe-Turned Brass: High-precision machining eliminates rotational runout, chuck wobble, and high-RPM vibration during delicate detailing and drilling.
• Standard Output Bore: Couples securely with standard mini brass collet chucks (0.5–3.2mm capacity) for micro drill bits and carving points.
• Corrosion-Resistant Solid Brass: Heavy-duty brass construction withstands mechanical stress and resists rust in wet grinding environments.

Recommended Applications

• Lapidary gemstone core drilling, carving, and fine cabochon work.
• Jewelry making, bezel setting, and metal engraving.
• Glass carving, ceramic detailing, and hobby crafting.

Technical Specifications

Installation & Operating Guidelines

• Slide the adapter squarely onto the clean 3.17mm motor shaft until fully seated.
• Thread or press the collet chuck body onto the adapter's output end.
• Select the proper collet size matching your tool shank diameter, tighten securely, and test runout before contacting the workpiece.
• Use continuous water lubrication when drilling hard gemstones or glass.