{"product_id":"premium-replacement-tension-assembly-44118-139738-for-singer-31-331k-sewing-machine","title":"Tension Assembly 44118=139738 for Singer 31, 331K Sewing Machine","description":"\u003cp\u003eTension Assembly (Part #44118 \/ 139738) – For Singer 31 \u0026amp; 331K\u003cbr\u003e\nAchieve flawless stitch consistency with the Tension Assembly (Part #44118 \/ 139738). This complete upper tension unit is precision-engineered for Singer 31 and 331K industrial machines. As the \"brain\" of your thread delivery system, this assembly regulates the flow of the upper thread, ensuring perfectly balanced stitches across a wide variety of fabric weights and industrial applications.\u003c\/p\u003e\n\n\u003cp\u003eKey Performance Features\u003cbr\u003e\nComplete Professional Unit: Includes the tension post, discs, beehive spring, check spring, and thumb nut—everything required for a full system overhaul.\u003c\/p\u003e\n\n\u003cp\u003ePrecision-Ground Tension Discs: Features ultra-smooth, mirror-polished discs that provide even pressure on the thread, preventing erratic tension spikes and thread shredding.\u003c\/p\u003e\n\n\u003cp\u003eResponsive Check Spring: Equipped with a high-resilience spring (43946\/8511) to control thread slack during the needle's descent, ensuring crisp loop formation.\u003c\/p\u003e\n\n\u003cp\u003eMicro-Adjustable Control: The fine-thread thumb nut allows for granular adjustments, making it easy to switch between lightweight synthetics and heavy-duty bonded threads.\u003c\/p\u003e\n\n\u003cp\u003eIndustrial Grade Build: Constructed from hardened steel and corrosion-resistant alloys to withstand the high-speed friction and heat of continuous industrial use.\u003c\/p\u003e","brand":"Universal","offers":[{"title":"Default Title","offer_id":48309660188921,"sku":"44118","price":6.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0693\/6733\/3113\/files\/Singer_Premium_Replacement_Parts.jpg?v=1776585850","url":"https:\/\/empenzoamericas.com\/products\/premium-replacement-tension-assembly-44118-139738-for-singer-31-331k-sewing-machine","provider":"Empenzo Americas Corp.","version":"1.0","type":"link"}