{"product_id":"knew-concepts-mk-iv-8in-hd-jewelers-saw-frame-lever-tension-swivel-blade-clamps","title":"Knew Concepts Mk.IV 8\" HD Saw Frame with Lever Tension \u0026 Swivel Blade Clamps","description":"\u003cp\u003eThe Knew Concepts Mk.IV 8\" Heavy Duty Jeweler's Saw Frame delivers exceptional rigidity and precision for demanding bench work. Built heavier than the Mk.III series by design, this frame generates up to 60 pounds of blade tension — significantly more than standard Knew Concepts frames — virtually eliminating flex during use. The result is noticeably improved cutting accuracy, especially when working with intricate patterns or thick stock.\u003c\/p\u003e\u003cp\u003eBecause of the increased structural strength of the Mk.IV HD frame, lever tension is the only practical tensioning method available. Traditional screw tension is not compatible with these heavier frames, making the cam lever mechanism both a necessity and an advantage — providing fast, consistent, repeatable blade tension with a single motion.\u003c\/p\u003e\u003cp\u003eThis 8\" version is fitted with Knew Concepts 360-degree swivel blade clamps, allowing the blade to be repositioned a full 360 degrees relative to the frame. Click stops every 45 degrees let you lock the blade at precise angles for interior cuts, tight curves, and complex fretwork — without removing or re-threading the blade.\u003c\/p\u003e\u003cp\u003eThe Mk.IV HD Hand Saw is available in three frame depths — 3\", 5\", and 8\" — each offered with Lever Tension alone or with Lever Tension and Swivel Blade Clamps.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHeavy-duty Mk.IV construction generates up to 60 lbs. of blade tension for a virtually flex-free cut\u003c\/li\u003e\n\u003cli\u003eCam lever tension system provides fast, consistent blade tensioning — traditional screw tension not compatible with this frame\u003c\/li\u003e\n\u003cli\u003e360-degree swivel blade clamps allow full blade rotation relative to the frame\u003c\/li\u003e\n\u003cli\u003eClick stops every 45 degrees for precise, repeatable blade positioning\u003c\/li\u003e\n\u003cli\u003e8\" frame depth accommodates larger workpieces and deeper interior cuts\u003c\/li\u003e\n\u003cli\u003eAvailable in 3\", 5\", and 8\" frame depths across the Mk.IV HD series\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFrame Depth\u003c\/th\u003e\n\u003ctd\u003e8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eMk.IV Heavy Duty (HD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTensioning System\u003c\/th\u003e\n\u003ctd\u003eCam lever tension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBlade Clamp Type\u003c\/th\u003e\n\u003ctd\u003e360-degree swivel with 45-degree click stops\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Blade Tension\u003c\/th\u003e\n\u003ctd\u003e60 lbs.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVariants\u003c\/th\u003e\n\u003ctd\u003eSingle configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTraditional screw tensioning is not compatible with this frame due to its increased structural strength.\u003c\/li\u003e\n\u003cli\u003eThis product is subject to California Proposition 65 warnings for lead and nickel.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Knew Concepts","offers":[{"title":"Default Title","offer_id":43583463784662,"sku":"149.688SC","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/knew-concepts-mk-iv-8-hd-jewelers-saw-frame-with-360-degree-swivel-blade-clamps-cam-lever-tension-otto-frei.jpg?v=1719956638","url":"https:\/\/www.ottofrei.com\/products\/knew-concepts-mk-iv-8in-hd-jewelers-saw-frame-lever-tension-swivel-blade-clamps","provider":"Otto Frei","version":"1.0","type":"link"}