{"title":"Kagan","description":"","products":[{"product_id":"kagan-ring-roller-replacement-rolls","title":"Kagan Ring Roller-Set Of Rolls Only","description":"\u003cp\u003eKeep your Kagan Ring Roller performing at its best with this genuine replacement roll set. This set provides all eight rollers needed to restore a Kagan Ring Roller unit, making it an essential spare for professional jewelers and metalsmiths who rely on consistent ring-forming results.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Kagan replacement rolls designed for the Kagan Ring Roller\u003c\/li\u003e\n\u003cli\u003eComplete set of 8 rollers included\u003c\/li\u003e\n\u003cli\u003eRestores full forming capability to your existing Kagan Ring Roller unit\u003c\/li\u003e\n\u003cli\u003eIdeal for professional jewelers and metalsmiths who depend on consistent ring sizing and shaping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003ctd\u003eSet of 8 rollers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Equipment\u003c\/th\u003e\n\u003ctd\u003eKagan Ring Roller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupplier\u003c\/th\u003e\n\u003ctd\u003eKagan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e8 replacement rollers\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kagan","offers":[{"title":"Default Title","offer_id":43580644425942,"sku":"148.346","price":658.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/kagan-ring-roller-set-of-rolls-only-otto-frei.jpg?v=1719958060"},{"product_id":"kagan-ring-sizer-replacement-segment-mandrel-part-4002","title":"Kagan Ring Sizer Part 4002 Segment Mandrel","description":"\u003cp\u003eKeep your Kagan Ring Sizer operating at full capacity with this genuine replacement segmented mandrel, Kagan Part Number 4002. Also referred to as splines, this component is the core working element of the classic Kagan Ring Sizer, responsible for supporting and sizing rings during the stretching process. Having a replacement on hand ensures minimal downtime when a mandrel segment shows wear or damage.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGenuine replacement part for the classic Kagan Ring Sizer\u003c\/li\u003e\n\u003cli\u003eKagan Part Number 4002\u003c\/li\u003e\n\u003cli\u003eSegmented mandrel design — also known as splines\u003c\/li\u003e\n\u003cli\u003eDesigned to restore full functionality to your Kagan Ring Sizer\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003e4002\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Equipment\u003c\/th\u003e\n\u003ctd\u003eClassic Kagan Ring Sizer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComponent Type\u003c\/th\u003e\n\u003ctd\u003eSegmented Mandrel (Splines)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Kagan","offers":[{"title":"Default Title","offer_id":43581124903126,"sku":"148.341","price":332.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/kagan-ring-sizer-part-4002-segment-mandrel-otto-frei.jpg?v=1719957718"},{"product_id":"kagan-11900-ring-roller-complete-dies-8-roller","title":"Kagan 11900 Ring Roller Complete-With Dies","description":"\u003cp\u003eThe J. J. Kagan 11900 Ring Roller delivers uniform pressure for precise, controlled stretching of stone-set rings — without loosening prongs or disturbing the stone setting. Simply select the grooved roller that matches the profile of the ring shank, pair it with the correct plain roller to fit the ring core, and roll across the shank for consistent results. The tool accommodates men's half round, ladies half round, knife edge, and flat shank styles.\u003c\/p\u003e\u003cp\u003eBeyond ring stretching, the Kagan 11900 doubles as a miniature, light-duty rolling mill. Feed wire — gold, silver, or copper — into the desired die shape to reduce or form it with ease. Made in the USA.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eApplies uniform pressure for consistent, accurate ring stretching\u003c\/li\u003e\n\u003cli\u003eStretches stone-set ring shanks without loosening prongs or disturbing settings\u003c\/li\u003e\n\u003cli\u003eCompatible with men's half round, ladies half round, knife edge, and flat shank styles\u003c\/li\u003e\n\u003cli\u003eFunctions as a miniature light-duty rolling mill for wire in gold, silver, or copper\u003c\/li\u003e\n\u003cli\u003eIncludes 8 polished roller dies: 4 flat rollers and 4 grooved rollers\u003c\/li\u003e\n\u003cli\u003eAccommodates ring shank sizes up to 5 mm\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eKagan 11900\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncluded Rollers\u003c\/th\u003e\n\u003ctd\u003e8 polished roller dies (4 flat, 4 grooved)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Shank Size\u003c\/th\u003e\n\u003ctd\u003e5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Shank Styles\u003c\/th\u003e\n\u003ctd\u003eMen's half round, ladies half round, knife edge, flat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSecondary Function\u003c\/th\u003e\n\u003ctd\u003eLight-duty rolling mill for wire forming\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWire Compatibility\u003c\/th\u003e\n\u003ctd\u003eGold, silver, copper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eKagan 11900 ring roller tool\u003c\/li\u003e\n\u003cli\u003e4 polished flat roller dies\u003c\/li\u003e\n\u003cli\u003e4 polished grooved roller dies\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kagan","offers":[{"title":"Default Title","offer_id":43581192569046,"sku":"148.345","price":1470.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/kagan-11900-ring-roller-complete-with-dies-otto-frei.jpg?v=1719957683"},{"product_id":"kagan-ring-sizer-stretcher-reducer-8-spline","title":"Kagan Ring Sizer","description":"\u003cp\u003eThe \u003cstrong\u003eJ.J. Kagan Ring Sizer\u003c\/strong\u003e is widely regarded as the finest ring stretcher and reducer available, with many thousands of units in use around the world. Built to last, it is not unusual to see Kagan ring sizers still performing reliably after 40 years of service—a testament to the quality of its construction.\u003c\/p\u003e\n\u003cp\u003eThe enlarging mandrel features \u003cstrong\u003e8 splines\u003c\/strong\u003e, which distribute force evenly for the easiest pull of any ring sizer on the market, allowing jewelers to size up rings with minimal effort. For size reduction, plain bands can be compressed using one of \u003cstrong\u003e12 countersunk and polished reducing holes\u003c\/strong\u003e, giving you precise, consistent results across a wide range of ring styles. Proudly made in California, USA.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e8-spline enlarging mandrel for effortless ring stretching\u003c\/li\u003e\n\u003cli\u003e12 countersunk and polished reducing holes for plain band compression\u003c\/li\u003e\n\u003cli\u003eExceptionally durable—known for decades of reliable professional service\u003c\/li\u003e\n\u003cli\u003eSuitable for both ring stretching and ring reducing\u003c\/li\u003e\n\u003cli\u003eMade in California, USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA (California)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEnlarging Splines\u003c\/th\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReducing Holes\u003c\/th\u003e\n\u003ctd\u003e12 countersunk and polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Kagan","offers":[{"title":"Default Title","offer_id":43581199319254,"sku":"148.340","price":1358.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/kagan-ring-sizer-otto-frei.jpg?v=1719957676"},{"product_id":"kagan-ring-reducing-plate-double-sided-12-choice-19-27mm","title":"Ring Reducing Plate for Kagan Ring Sizer","description":"\u003cp\u003eThe Kagan Ring Reducing Plate is a double-sided, smoothly polished steel plate designed to reduce the size of plain round precious metal wedding bands when used with the Kagan ring stretcher and reducing tool. With 6 holes per side and two different tapers, this single plate delivers 12 working choices for a range of ring outside diameters. The polished finish helps prevent marring on gold and platinum bands during the reducing process.\u003c\/p\u003e\n\n\u003cp\u003eEach side of the plate shares the same hole diameters, but the tapers differ—giving the jeweler flexibility for different band profiles and reduction goals. The largest hole, at 27mm outside diameter, is suited to reduce a U.S. size 13–14 plain domed band of medium weight by a full size. Note that the outside diameter of the ring—not the ring size—is the limiting factor when selecting the appropriate hole.\u003c\/p\u003e\n\n\u003cp\u003eThis reducing plate is also widely used by metalsmiths for making coin rings with ball bearings. Video tutorials demonstrating this technique are available on YouTube.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble-sided plate with 6 holes per side—12 total working choices\u003c\/li\u003e\n  \u003cli\u003eTwo distinct tapers (one per side) for versatile reduction options\u003c\/li\u003e\n  \u003cli\u003eSmoothly polished surface to prevent marring on precious metal bands\u003c\/li\u003e\n  \u003cli\u003eDesigned for use with the Kagan ring stretcher and reducing tool\u003c\/li\u003e\n  \u003cli\u003eSuitable for plain round gold and platinum wedding bands\u003c\/li\u003e\n  \u003cli\u003ePopular secondary use for coin ring making with ball bearings\u003c\/li\u003e\n  \u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eHole Configuration\u003c\/th\u003e\n\u003ctd\u003e6 holes per side, 2 tapers, 12 choices total\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eHole Outside Diameters\u003c\/th\u003e\n\u003ctd\u003e19mm – 27mm (3\/4\" – 1-1\/16\")\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCenter Mounting\u003c\/th\u003e\n\u003ctd\u003e5\/8\" rod that extrudes 3\/16\" from either side\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003ctd\u003eFits Kagan ring stretcher and reducing tool\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eIntended Use\u003c\/th\u003e\n\u003ctd\u003eReducing plain round precious metal (gold and platinum) wedding bands\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eMade in USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThe outside diameter of the ring—not the ring size—is the limiting factor when selecting the correct hole.\u003c\/li\u003e\n  \u003cli\u003eThe largest 27mm hole is suited for reducing a U.S. size 13–14 plain domed band of medium weight by approximately one full size.\u003c\/li\u003e\n  \u003cli\u003eThis plate is intended for use with \u003cem\u003eplain round\u003c\/em\u003e precious metal bands only. It is not designed for shaped, patterned, or non-round profiles.\u003c\/li\u003e\n  \u003cli\u003eFor coin ring making applications, video tutorials are available on YouTube.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kagan","offers":[{"title":"Default Title","offer_id":43586793603286,"sku":"148.342","price":254.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/ring-reducing-plate-for-kagan-ring-sizer-otto-frei.jpg?v=1719955785"},{"product_id":"large-spring-kagan-segment-mandrel-148-341","title":"Large Spring for Kagan Segment Mandrel 148.341","description":"\u003cp\u003eKeep your Kagan Segment Mandrel performing at its best with this replacement large spring, designed specifically for the \u003cstrong\u003eKagan Segment Mandrel (148.341)\u003c\/strong\u003e. When the spring loses tension or becomes damaged through regular use, this direct replacement restores full functionality to your mandrel without the need to replace the entire tool.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplacement large spring designed for the Kagan Segment Mandrel 148.341\u003c\/li\u003e\n\u003cli\u003eRestores proper tension and segment action to the mandrel\u003c\/li\u003e\n\u003cli\u003eExtends the working life of your existing Kagan Segment Mandrel\u003c\/li\u003e\n\u003cli\u003eA practical spare part for professional jewelers and metalsmiths who rely on the Kagan mandrel regularly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Tool\u003c\/th\u003e\n\u003ctd\u003eKagan Segment Mandrel 148.341\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComponent Type\u003c\/th\u003e\n\u003ctd\u003eReplacement Spring (Large)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVariant Count\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eThis spring is intended as a replacement part for the \u003cstrong\u003eKagan Segment Mandrel 148.341\u003c\/strong\u003e only. Verify compatibility with your specific mandrel model before ordering.\u003c\/p\u003e","brand":"Kagan","offers":[{"title":"Default Title","offer_id":44111478161622,"sku":"148.341LSpring","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/large-spring-for-kagan-segment-mandrel-148-341-otto-frei.jpg?v=1719954222"},{"product_id":"small-spring-kagan-segment-mandrel-148-341","title":"Small Spring for Kagan Segment Mandrel 148.341","description":"\u003cp\u003eKeep your Kagan Segment Mandrel performing at its best with this replacement small spring, designed specifically for the \u003cstrong\u003eKagan Segment Mandrel (148.341)\u003c\/strong\u003e. When the spring on your mandrel wears out or breaks, this direct replacement part restores full functionality so you can get back to forming and sizing rings without interruption.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplacement small spring designed for the Kagan Segment Mandrel 148.341\u003c\/li\u003e\n\u003cli\u003eRestores proper tension and function to your existing mandrel\u003c\/li\u003e\n\u003cli\u003eKeeps your ring forming and stretching workflow uninterrupted\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Mandrel\u003c\/th\u003e\n\u003ctd\u003eKagan Segment Mandrel 148.341\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVariant Count\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eThis spring is a replacement component intended for use with the Kagan Segment Mandrel \u003cstrong\u003e148.341\u003c\/strong\u003e only. Verify your mandrel model number before ordering to ensure proper fit.\u003c\/p\u003e","brand":"Kagan","offers":[{"title":"Default Title","offer_id":44111478194390,"sku":"148.341Sspring","price":7.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/small-spring-for-kagan-segment-mandrel-148-341-otto-frei.jpg?v=1719954222"}],"url":"https:\/\/www.ottofrei.com\/ja\/collections\/kagan-ring-sizers-rollers.oembed","provider":"Otto Frei","version":"1.0","type":"link"}