{"product_id":"kansai-special-98-6630-0-chain-off-cutting-knife-upper","title":"Kansai Special 98-6630-0 Chain-Off Cutting Knife (Upper)","description":"\u003ch2\u003eKansai Special 98-6630-0 Chain-Off Cutting Knife (Upper)\u003c\/h2\u003e\n\u003cp\u003eKansai Special spare part 98-6630-0: Chain-Off Cutting Knife (Upper). This is a single blade; any partner knife is a separate part. The same part number is used across many Kansai Special machine families, for example NFS, FSX and SX.\u003c\/p\u003e\n\u003cp\u003eThe cutting pair of an overlock or chainstitch machine wears with every seam it trims. A dull or chipped blade shows first as frayed edges and thread ends left hanging.\u003c\/p\u003e\n\u003ch3\u003eDetails\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eKansai Special part number: \u003cstrong\u003e98-6630-0\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePart name: Chain-Off Cutting Knife (Upper)\u003c\/li\u003e\n\u003cli\u003eShort form of the number: 98-663\u003c\/li\u003e\n\u003cli\u003eType: Knives \u0026amp; Cutters\u003c\/li\u003e\n\u003cli\u003eKansai Special parts books that list this part: NFS, FSX, SX, SQ\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to replace it\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThere are chips or nicks along the cutting edge\u003c\/li\u003e\n\u003cli\u003eThreads are not cut cleanly or are left hanging\u003c\/li\u003e\n\u003cli\u003eWorn so short that the blade can no longer be set to its partner\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen you replace one knife, check the partner. If its edge is chipped, rounded or burred, replace both. Set the knife pressure and timing as the manual for your machine describes. Knife edges are very sharp, so handle them with care. Switch the machine off and unplug it before you start, and turn the handwheel by hand through a full stitch before the first run.\u003c\/p\u003e\n\u003ch3\u003eChoosing the right part\u003c\/h3\u003e\n\u003cp\u003eKnives are specific to the machine and its cutting mechanism, and many are handed (left or right, upper or lower). Keep the same side and position as the knife you remove. The part number is the safest check: the same number can be used on more than one model.\u003c\/p\u003e\n\u003ch3\u003eMore Kansai Special parts for the same machines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kansai-special-98-6620-0-chain-off-cutting-knife-lower\"\u003eKansai Special 98-6620-0 Chain-Off Cutting Knife (Lower)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kansai-special-98-8570-0-o-ring\"\u003eKansai Special 98-8570-0 O-Ring\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eQuestions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eShould I replace both knives at once?\u003c\/strong\u003e\u003cbr\u003eOften, yes. One knife of the pair usually wears first, but a new knife against a chipped or rounded partner cuts poorly and wears faster. If the partner's edge is still clean and sharp, replacing one knife is fine.\u003c\/p\u003e\n\u003cp\u003eMore in this group: \u003ca href=\"\/collections\/kansai-special-knives-and-cutters\"\u003eKansai Special knives \u0026amp; cutters\u003c\/a\u003e. Everything from this maker: \u003ca href=\"\/collections\/kansai-special-spare-parts\"\u003eall Kansai Special spare parts\u003c\/a\u003e.\u003c\/p\u003e","brand":"PRIZZI SEWING MACHINE CO.","offers":[{"title":"Default Title","offer_id":51105721319589,"sku":"KAN-98-663","price":17.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/7593\/5397\/files\/kp_knife_v2.png?v=1793912220","url":"https:\/\/prizzisewing.com\/products\/kansai-special-98-6630-0-chain-off-cutting-knife-upper","provider":"PRIZZI SEWING MACHINE CO.","version":"1.0","type":"link"}