{"product_id":"3-17mm-mini-brass-drill-chuck-shaft-adapter-dremel-foredom-rotary-tools","title":"Mini Brass Drill Chuck Shaft Adapter – 3.17mm (1\/8\") for Dremel, Foredom \u0026 Rotary Tools","description":"\u003cstyle\u003e\na {\n  text-decoration: none;\n  color: inherit;\n  transition: all 0.3s ease;\n}\na:hover {\n  text-decoration: underline;\n}\n@media only screen and (max-width: 768px) {\n  body { font-size: 16px; line-height: 1.6; padding: 0 10px; }\n  a { word-break: break-word; font-size: 16px; }\n  img { max-width: 100%; height: auto; }\n  table { width: 100%; display: block; overflow-x: auto; }\n}\n\u003c\/style\u003e\n\u003cp\u003eThe \u003cstrong\u003eMini Brass Drill Chuck Shaft Adapter – 3.17 mm (1\/8\")\u003c\/strong\u003e is the universal standard adapter for connecting a brass collet chuck to Dremel-style rotary tools, Foredom flex-shaft handpieces, and WEN-equivalent rotary platforms. The most widely used shaft size in \u003cstrong\u003e\u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/lapidary-grinding-polishing\" rel=\"noreferrer\" target=\"_blank\"\u003elapidary\u003c\/a\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/jewelry-making-tools\" rel=\"noreferrer\" target=\"_blank\"\u003ejewelry bench work\u003c\/a\u003e\u003c\/strong\u003e, and \u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/glass-grinding-finishing\" rel=\"noreferrer\" target=\"_blank\"\u003eglass finishing\u003c\/a\u003e — fits directly without modification.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003ch4\u003e\u003cstrong\u003ePrecision-Machined Brass Construction\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eSolid Brass Body\u003c\/strong\u003e: Machined to tight tolerances for a secure, wobble-free fit between your 3.17 mm (1\/8\") motor shaft and collet chuck — minimizing runout and vibration at operating RPM.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eKnurled Grip Surface\u003c\/strong\u003e: Textured exterior for positive hand-tightening and secure seating during chuck installation and removal.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003e3.17 mm (1\/8\") Shaft Fit — The Universal Standard\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003eFits \u003cstrong\u003eDremel\u003c\/strong\u003e, \u003cstrong\u003eWEN\u003c\/strong\u003e, \u003cstrong\u003eForedom\u003c\/strong\u003e, and equivalent rotary tools and flex-shaft handpieces — the most widely used shaft diameter in lapidary, jewelry, and glass finishing applications.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eOutput bore: \u003cstrong\u003e3.17 mm (1\/8\")\u003c\/strong\u003e — compatible with our Mini Brass Collet Chuck and most third-party mini brass chucks accepting a standard 1\/8\" input bore.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eUniversal Chuck Compatibility\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003eDesigned to pair directly with our \u003cstrong\u003eMini Brass Collet Chuck\u003c\/strong\u003e (3.17 mm bore) — sold separately or as part of the \u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/machine-accessories\" rel=\"noreferrer\" target=\"_blank\"\u003eFull Collet Chuck Set\u003c\/a\u003e.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eAlso compatible with most third-party mini brass chucks accepting a standard 3.17 mm (1\/8\") input bore.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003ch4\u003e\u003cstrong\u003eLapidary \u0026amp; Glass Finishing\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eFlex-Shaft Compatibility\u003c\/strong\u003e: Integrates directly with Foredom and equivalent flex-shaft handpieces for bench-top \u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/lapidary-grinding-polishing\" rel=\"noreferrer\" target=\"_blank\"\u003elapidary carving\u003c\/a\u003e and stone work.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eRotary Tool Integration\u003c\/strong\u003e: Attach a collet chuck to Dremel-style tools for improved grip on \u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/sintered-diamond-core-drills\" rel=\"noreferrer\" target=\"_blank\"\u003esintered diamond points\u003c\/a\u003e and \u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/glass-grinding-finishing\" rel=\"noreferrer\" target=\"_blank\"\u003eglass grinding\u003c\/a\u003e burs.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eJewelry Making \u0026amp; Precision Bench Work\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eBur \u0026amp; Engraving Bit Grip\u003c\/strong\u003e: Secure collet-based clamping on fine carbide burs for detailed metalwork, stone setting, and \u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/gemstone-faceting-tools\" rel=\"noreferrer\" target=\"_blank\"\u003efaceting tool\u003c\/a\u003e maintenance.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eDremel-Style Rotary Tools\u003c\/strong\u003e: The 3.17 mm adapter is the direct-fit standard for Dremel, WEN, and equivalent brands — no modification required.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003e\u003cstrong\u003eElectronics, PCB \u0026amp; DIY Fabrication\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eMicro Drill Presses\u003c\/strong\u003e: Compatible with benchtop micro drill press spindles accepting 3.17 mm shafts — common in PCB and electronics fabrication setups.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eCNC Spindle Motors\u003c\/strong\u003e: Suitable for low-power CNC router spindles and engraving machines with 3.17 mm motor shafts.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShaft Bore (Input)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.17 mm (1\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChuck Bore (Output)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.17 mm (1\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSolid Brass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Motor Types\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDremel, WEN, Foredom, flex-shaft handpieces, micro drill presses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTypical Applications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLapidary, jewelry, glass finishing, PCB drilling, CNC engraving\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\u003cstrong\u003eComparison: Shaft Adapter vs. Full Chuck Set\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eShaft Adapter (This Listing)\u003c\/th\u003e\n\u003cth\u003eFull Collet Chuck Set\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 × 3.17 mm shaft adapter\u003c\/td\u003e\n\u003ctd\u003eChuck body + 11 collets + 1 adapter + hex key\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBest For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eReplacing or adding a 3.17 mm adapter to an existing chuck\u003c\/td\u003e\n\u003ctd\u003eComplete micro-drilling solution from scratch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChuck Required\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes — sold separately\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003ePress the 3.17 mm adapter firmly onto your rotary tool or motor shaft.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eThread or press the collet chuck body onto the adapter’s output end (3.17 mm bore).\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eInsert the appropriate collet, load your drill bit or bur shank, and tighten with the hex key before operating.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eBest Practices\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003eVerify your tool shaft diameter with calipers before ordering — nominal 1\/8\" sizes may vary slightly by manufacturer.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eEnsure the adapter is fully seated and secure before operating at high RPM to prevent runout or chuck wobble.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003eWhen drilling hard materials such as stone or glass, pair with \u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/diamond-wire-hollow-drill-bits\" rel=\"noreferrer\" target=\"_blank\"\u003ediamond-coated drill bits\u003c\/a\u003e and use water as a coolant to extend bit life.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eCompatible Collet Sizes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis adapter is compatible with the following collet sizes when used with our Mini Brass Collet Chuck:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCollet Size\u003c\/th\u003e\n\u003cth\u003eClamping Range\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e0.5 mm\u003c\/td\u003e\n\u003ctd\u003e0.2 – 0.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0.8 mm\u003c\/td\u003e\n\u003ctd\u003e0.3 – 0.9 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.0 mm\u003c\/td\u003e\n\u003ctd\u003e0.7 – 1.1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.2 mm\u003c\/td\u003e\n\u003ctd\u003e0.8 – 1.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.6 mm\u003c\/td\u003e\n\u003ctd\u003e1.3 – 1.7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1.8 mm\u003c\/td\u003e\n\u003ctd\u003e1.4 – 1.9 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2.0 mm\u003c\/td\u003e\n\u003ctd\u003e1.8 – 2.1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2.4 mm\u003c\/td\u003e\n\u003ctd\u003e2.1 – 2.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3.0 mm\u003c\/td\u003e\n\u003ctd\u003e2.5 – 3.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3.2 mm\u003c\/td\u003e\n\u003ctd\u003e2.8 – 3.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\u003cstrong\u003eRelated Tools\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/machine-accessories\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cstrong\u003eMini Brass Collet Chuck Set\u003c\/strong\u003e\u003c\/a\u003e — The matching chuck body and collet set for use with this adapter.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/diamond-wire-hollow-drill-bits\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cstrong\u003eDiamond Wire Hollow Drill Bits\u003c\/strong\u003e\u003c\/a\u003e — Ideal for drilling gemstones, glass, and ceramic with your chuck setup.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/sintered-diamond-core-drills\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cstrong\u003eSintered Diamond Core Drills\u003c\/strong\u003e\u003c\/a\u003e — For larger bore drilling in hard stone and glass with superior longevity.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/machine-accessories\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cstrong\u003eMachine Accessories\u003c\/strong\u003e\u003c\/a\u003e — Full range of shaft adapters, backing plates, and motor accessories.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/jewelry-making-tools\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003cstrong\u003eJewelry Making Tools\u003c\/strong\u003e\u003c\/a\u003e — Burs, mandrels, and precision tools for bench jewelers and stone setters.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eWhy Choose This Shaft Adapter?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eUniversal Standard\u003c\/strong\u003e: 3.17 mm (1\/8\") is the most widely used shaft size across Dremel, Foredom, and equivalent rotary tool platforms — the safest choice for most lapidary and jewelry setups.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePrecision Fit\u003c\/strong\u003e: Machined to tight tolerances for a secure, low-runout connection between your rotary tool and collet chuck.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eImmediate Upgrade\u003c\/strong\u003e: Extend the utility of your existing collet chuck to any 3.17 mm rotary tool platform without sourcing custom parts.\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eIdeal For\u003c\/strong\u003e: \u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/jewelry-making-tools\" rel=\"noreferrer\" target=\"_blank\"\u003eJewelry makers\u003c\/a\u003e, \u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/lapidary-grinding-polishing\" rel=\"noreferrer\" target=\"_blank\"\u003elapidary artists\u003c\/a\u003e, \u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/gemstone-faceting-tools\" rel=\"noreferrer\" target=\"_blank\"\u003egemstone faceters\u003c\/a\u003e, PCB fabricators, and electronics makers upgrading or expanding their precision drilling setup.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eExplore our full range of \u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/machine-accessories\" rel=\"noreferrer\" target=\"_blank\"\u003emachine accessories\u003c\/a\u003e and \u003ca href=\"https:\/\/lapidarygrinder.com\/collections\/diamond-wire-hollow-drill-bits\" rel=\"noreferrer\" target=\"_blank\"\u003ediamond drill bits\u003c\/a\u003e to complete your precision drilling setup. For bulk orders or custom configurations, contact our team for tailored solutions.\u003c\/strong\u003e\u003c\/p\u003e","brand":"flexiblediamondabrasive","offers":[{"title":"Default Title","offer_id":53379782574264,"sku":null,"price":8.55,"currency_code":"USD","in_stock":true}],"url":"https:\/\/lapidarygrinder.com\/pl-mx\/products\/3-17mm-mini-brass-drill-chuck-shaft-adapter-dremel-foredom-rotary-tools","provider":"hanslapidarytool","version":"1.0","type":"link"}