{"product_id":"knew-concepts-mkv-cam-lever-jewelers-saw-frame-3in-5in","title":"Knew Concepts Mk.V Saw Frames with Lever Tension 3\" \u0026 5\"","description":"\u003cp\u003eThe Knew Concepts Mk.V Jeweler's Saw Frame with Cam-Lever Tension is a refined evolution of the classic jeweler's saw, engineered for rapid, repeatable blade changes without sacrificing precision. Designed for piercing work and other applications requiring frequent blade swaps, the lever system lets you set your preferred blade tension once with the fine-tune knob, then simply flip the lever forward to release and back to return to that exact tension every time — no re-tuning required unless blade size or length changes.\u003c\/p\u003e\n\u003cp\u003eThe Mk.V introduces a strengthened triangulated truss design — the same geometry that defines the Mk.IV frames — along with a new, improved blade clamp system. The clamps now feature \u003cstrong\u003ewitness holes\u003c\/strong\u003e so you can visually confirm the blade is fully seated before tensioning. The extra clamp length provides more contact area for a more secure grip, and the witness holes also allow sawdust to escape, keeping the clamp faces clean and reliable over extended use.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCam-lever quick tension\u003c\/strong\u003e — flip the lever forward to release, reposition or swap the blade, and flip back to return to your dialed-in tension instantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFine tension knob\u003c\/strong\u003e — set the blade \"ping\" once; the lever handles on\/off tensioning for subsequent blade changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWitness holes in blade clamps\u003c\/strong\u003e — see the back of the blade to confirm full seating; holes also allow sawdust to exit for consistent clamping.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended clamp length\u003c\/strong\u003e — increased contact area provides improved blade grip and holding strength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriangulated truss frame design\u003c\/strong\u003e — the same reinforced geometry as the Mk.IV for greater rigidity and reduced flex.\u003c\/li\u003e\n\u003cli\u003eAccepts standard \u003cstrong\u003eun-pinned jeweler's saw blades\u003c\/strong\u003e (approx. 5-1\/8\" length), including spiral blades.\u003c\/li\u003e\n\u003cli\u003eReversible clamp knobs accommodate right- or left-handed users.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eMk.V with Cam-Lever Tension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBlade Type\u003c\/th\u003e\n\u003ctd\u003eUn-pinned jeweler's saw blades (approx. 5-1\/8\" length)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTensioning System\u003c\/th\u003e\n\u003ctd\u003eCam lever with fine-tune knob\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFrame Design\u003c\/th\u003e\n\u003ctd\u003eTriangulated truss\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProp 65\u003c\/th\u003e\n\u003ctd\u003eLead-Nickel warning applies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAvailable Options\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart #\u003c\/th\u003e\n\u003cth\u003eThroat Depth\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e149.673\u003c\/td\u003e\n\u003ctd\u003e3\" (75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e149.675\u003c\/td\u003e\n\u003ctd\u003e5\" (125 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKnew Concepts Mk.V cam-lever saw frame in selected throat depth\u003c\/li\u003e\n\u003cli\u003eInstruction sheet (lever-tension version)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThis frame uses un-pinned jeweler's saw blades only. Coping saw blades (pinned) are not compatible.\u003c\/li\u003e\n\u003cli\u003eIf the lever resists closing, back off the fine knob slightly before closing — do not force the lever.\u003c\/li\u003e\n\u003cli\u003eIf blade slipping occurs, clean the clamp faces and ensure the blade seats straight against the anvil screw.\u003c\/li\u003e\n\u003cli\u003eThe lever can be flipped to slacken the blade at the end of use, which is gentle on blade life during storage.\u003c\/li\u003e\n\u003cli\u003eCalifornia Proposition 65: This product carries a Lead-Nickel warning.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Knew Concepts","offers":[{"title":"3\" (75mm)","offer_id":43692827607254,"sku":"149.673","price":95.0,"currency_code":"USD","in_stock":true},{"title":"5\" (125mm)","offer_id":43692827640022,"sku":"149.675","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/knew-concepts-cam-tension-jewelers-precision-sawframes-otto-frei.jpg?v=1719955512","url":"https:\/\/www.ottofrei.com\/products\/knew-concepts-mkv-cam-lever-jewelers-saw-frame-3in-5in","provider":"Otto Frei","version":"1.0","type":"link"}