{"product_id":"k-o-lee-expanding-mandrels-kol-mandrel","title":"K.O. Lee Expanding Mandrels KOL-Mandrel","description":"\u003c!-- CY\/3.C | CLEAN + READABLE PRODUCT DESCRIPTION --\u003e\n\u003cstyle\u003e\n    .iron-theme{\n      --black:#0b0b0b; --gray:#6b7280;\n      --red:#c1121f; --red2:#e11d2e;\n      --border:#e5e7eb; --soft:#f8fafc;\n      font-family: Arial, Helvetica, sans-serif;\n      color: var(--black);\n      max-width: 1100px;\n      margin: 0 auto;\n      line-height: 1.7;\n    }\n    .shell{border:1px solid var(--border);border-radius:16px;overflow:hidden;background:#fff;box-shadow:0 10px 28px rgba(0,0,0,.08);}\n    .top{padding:24px;}\n    .kicker{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--gray);margin:0 0 8px;}\n    h1{margin:0;font-size:30px;font-weight:900;text-transform:uppercase;}\n    .sub{margin:12px 0 0;font-size:15px;max-width:100ch;}\n    .stripe{height:8px;background:linear-gradient(90deg,var(--red) 0%,var(--red) 70%,var(--red2) 100%);}\n    .content{padding:24px;background:var(--soft);}\n    .card{border:1px solid var(--border);border-radius:16px;background:#fff;padding:20px;margin:18px 0;box-shadow:0 8px 22px rgba(0,0,0,.06);}\n    h2{margin:0 0 12px;font-size:19px;font-weight:900;text-transform:uppercase;display:flex;align-items:center;gap:10px;}\n    h2:before{content:\"\";width:10px;height:10px;background:var(--red);border-radius:2px;}\n    ul{margin:0;padding-left:20px;}\n    ul li{margin:8px 0;}\n    table{width:100%;border-collapse:collapse;font-size:14px;}\n    th, td{border:1px solid var(--border);padding:10px;text-align:left;}\n    th{background:#f3f4f6;font-size:12px;text-transform:uppercase;font-weight:900;}\n    .callout{border:1px dashed rgba(193,18,31,.5);background:rgba(193,18,31,.06);border-radius:12px;padding:14px;font-size:14px;margin-top:12px;}\n  \u003c\/style\u003e\n\u003csection aria-label=\"K.O. Lee Expanding Mandrels KOL-Mandrel Product Description\" class=\"cy3c-wrap iron-theme\"\u003e\n\u003cdiv class=\"shell\"\u003e\n\u003c!-- HERO --\u003e\n\u003cdiv class=\"top\"\u003e\n\u003cp class=\"kicker\"\u003ePrecision Workholding • Internal Gripping • High Accuracy Mandrels\u003c\/p\u003e\n\u003ch2\u003eK.O. Lee Expanding Mandrels KOL-Mandrel\u003c\/h2\u003e\n\u003cp class=\"sub\"\u003eThe \u003cstrong\u003eK.O. Lee Expanding Mandrels KOL-Mandrel\u003c\/strong\u003e system is a time-tested workholding solution designed for precision grinding, turning, and milling operations. Engineered for versatility and accuracy, these expanding mandrels securely grip internal diameters, allowing machinists to maintain tight tolerances while minimizing distortion. Designed for use across toolrooms, production shops, and heavy-duty machining environments, K.O. Lee mandrels provide dependable performance for both light and demanding applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"stripe\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"content\"\u003e\n\u003c!-- APPLICATIONS --\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch2\u003eK.O. Lee Expanding Mandrels KOL-Mandrel Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInternal workholding for grinding, turning, and milling operations\u003c\/li\u003e\n\u003cli\u003eMachining thin sleeves, bushings, and delicate components\u003c\/li\u003e\n\u003cli\u003eHolding heavy castings and forgings during roughing and finishing\u003c\/li\u003e\n\u003cli\u003ePrecision toolroom and production machining setups\u003c\/li\u003e\n\u003cli\u003eFacing and overhang machining operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"callout\"\u003eDesigned to securely hold a wide range of parts without distortion while maintaining high concentricity and repeatability.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- SPECIFICATIONS --\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch2\u003eK.O. Lee Expanding Mandrels KOL-Mandrel Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eExpanding Mandrel System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHole Capacity Range\u003c\/th\u003e\n\u003ctd\u003e3\/8″ to 5-1\/2″ (9.5 to 139.7 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAccuracy\u003c\/th\u003e\n\u003ctd\u003e0.001″ (0.025 mm) or better\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMandrel Types\u003c\/th\u003e\n\u003ctd\u003eGeneral Purpose \u0026amp; Heavy Duty Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003ePrecision Ground Arbors and Sleeves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorkholding Type\u003c\/th\u003e\n\u003ctd\u003eInternal Expanding Grip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Compatibility\u003c\/th\u003e\n\u003ctd\u003eLathe, Milling Machine, Grinding Machine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailability\u003c\/th\u003e\n\u003ctd\u003eComplete Sets or Individual Mandrels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- FEATURES --\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch2\u003eK.O. Lee Expanding Mandrels KOL-Mandrel Performance \u0026amp; Construction\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge bearing surface sleeves\u003c\/strong\u003e provide secure grip, preventing slip and minimizing chatter during machining.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision ground arbors and sleeves\u003c\/strong\u003e ensure consistent accuracy up to 0.001″ or better.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal expanding mechanism\u003c\/strong\u003e allows uniform clamping without distorting thin-walled parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile workholding\u003c\/strong\u003e supports overhang machining and multiple positioning configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuxiliary centers\u003c\/strong\u003e feature integrated oil reservoirs, extend arbor life, and protect center points.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWear-resistant design\u003c\/strong\u003e reduces maintenance and extends service life in production environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchangeable mandrels\u003c\/strong\u003e eliminate the need for custom setups for each job.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- SERIES OPTIONS --\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch2\u003eK.O. Lee Expanding Mandrels KOL-Mandrel Series Options\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeneral Purpose Series:\u003c\/strong\u003e Covers 3\/8″ to 2-1\/2″ (9.53 to 63.5 mm), ideal for toolrooms, home shops, and light production.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM90 Set:\u003c\/strong\u003e Includes M0, M1, M2 mandrels (3\/8″ to 1″ capacity).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM100 \/ M100X Sets:\u003c\/strong\u003e Extended range up to 1-9\/16″ with flexible configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM101 Set:\u003c\/strong\u003e Full general-purpose coverage up to 2-1\/2″ capacity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy Duty Series:\u003c\/strong\u003e Covers 11\/16″ to 5-1\/2″ (17.5 to 139.7 mm), designed for production and heavy roughing operations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM200 \/ M200X \/ M201 \/ M202 Sets:\u003c\/strong\u003e Configurations for increased strength and larger diameter workholding.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"callout\"\u003eAvailable as complete sets or individual mandrels, allowing flexible setup customization for any machining requirement.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- INCLUDED \/ OPTIONS --\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch2\u003eK.O. Lee Expanding Mandrels KOL-Mandrel Configuration \u0026amp; Availability\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eComplete mandrel and sleeve sets available across multiple size ranges\u003c\/li\u003e\n\u003cli\u003eArbors and sleeves available separately for custom configurations\u003c\/li\u003e\n\u003cli\u003eHeavy-duty and general-purpose configurations to match application needs\u003c\/li\u003e\n\u003cli\u003eMultiple length and diameter options for precision fitment\u003c\/li\u003e\n\u003cli\u003eMandrel boxes (legacy options, availability may vary)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- SUMMARY --\u003e\n\u003cdiv class=\"card\"\u003e\n\u003ch2\u003eWhy Choose the K.O. Lee Expanding Mandrels KOL-Mandrel\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-precision internal workholding with minimal distortion\u003c\/li\u003e\n\u003cli\u003eWide size range covering small to large diameter applications\u003c\/li\u003e\n\u003cli\u003eDurable construction for both light and heavy-duty machining\u003c\/li\u003e\n\u003cli\u003eFlexible system reduces tooling inventory and setup time\u003c\/li\u003e\n\u003cli\u003eProven performance in grinding, turning, and milling operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"callout\"\u003eThe K.O. Lee Expanding Mandrels KOL-Mandrel system delivers precision, versatility, and reliability—making it an essential solution for machinists requiring accurate internal workholding across a wide range of applications.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e","brand":"K.O. 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