{"product_id":"durston-2126-medium-ring-stretcher-mandrel","title":"Mandrin à agrandir les bagues Durston 2126 format moyen","description":"\u003cp\u003eThis medium expanding ring stretcher mandrel makes it easy to enlarge and size rings in the mid-range of sizes, in a compact format that tucks neatly into a drawer or tool roll. Once clamped, the mandrel expands smoothly as you tighten the center bolt, easing the shank out in small, controlled steps.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMedium expanding ring stretcher mandrel sized for everyday ring work.\u003c\/li\u003e\n  \u003cli\u003eCompact design stores easily and is well suited to travel or small bench setups.\u003c\/li\u003e\n  \u003cli\u003eCan be secured in a vice, clamp, or used with a suitable lathe\/polisher for powered stretching.\u003c\/li\u003e\n  \u003cli\u003eCenter bolt expansion tightened with the included hex key for even, controlled enlargement.\u003c\/li\u003e\n  \u003cli\u003eSupports both gentle size adjustments and truing slightly out-of-round rings.\u003c\/li\u003e\n  \u003cli\u003ePairs naturally with other ring sizing tools to build a flexible sizing workflow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eDetail\u003c\/th\u003e\n    \u003cth\u003eValue\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eMedium Diameter Range\u003c\/td\u003e\n    \u003ctd\u003e17.5–20.5 mm (approx. 0.69–0.81\")\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eTotal Length\u003c\/td\u003e\n    \u003ctd\u003e92 mm (approx. 3.62\")\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eTool Type\u003c\/td\u003e\n    \u003ctd\u003eExpanding ring stretcher mandrel\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eMounting\u003c\/td\u003e\n    \u003ctd\u003eUse in vice, clamp, or with suitable lathe\/polisher\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eExpansion Mechanism\u003c\/td\u003e\n    \u003ctd\u003eCenter bolt tightened with hex key\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eBrand\u003c\/td\u003e\n    \u003ctd\u003eDurston\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eItem\u003c\/th\u003e\n    \u003cth\u003eDescription\u003c\/th\u003e\n    \u003cth\u003eQty\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eMedium ring stretcher mandrel\u003c\/td\u003e\n    \u003ctd\u003eExpanding mandrel for 17.5–20.5 mm ring diameters\u003c\/td\u003e\n    \u003ctd\u003e1\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eHex key\u003c\/td\u003e\n    \u003ctd\u003eFor tightening the center bolt to expand the mandrel\u003c\/td\u003e\n    \u003ctd\u003e1\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eSecure the mandrel firmly in a bench vice, clamp, or appropriate lathe\/polisher fixture before use. Suitable for enlarging plain bands and many fabricated rings; use extra care with stone-set or solder-heavy designs.\u003c\/p\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003ePlace the ring over the mandrel, then tighten the center bolt gradually with the hex key to stretch the ring. Work in small increments and check the size frequently to avoid over-stretching, especially on soldered or stone-set rings.\u003c\/p\u003e\n","brand":"Durston","offers":[{"title":"Default Title","offer_id":45999501967574,"sku":"148.2126","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/durston-2126-medium-ring-stretcher-mandrel-otto-frei-1.jpg?v=1726697767","url":"https:\/\/www.ottofrei.com\/fr\/products\/durston-2126-medium-ring-stretcher-mandrel","provider":"Otto Frei","version":"1.0","type":"link"}