{"product_id":"rocker-shaft-spring-143286-knee-lift-return-spring-for-singer-industrial","title":"Rocker Shaft Spring 143286 - Knee Lift Return Spring for Singer Industrial","description":"\u003ch3\u003eRocker Shaft Spring 143286 - Knee Lift Assembly Component\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 143286\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Tension spring for knee lift assembly\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFunction and Purpose:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Rocker Shaft Spring is a critical tension component used in the knee lift assembly of industrial sewing machines. This spring provides the essential return force that brings the knee lifter bar back to its neutral position after the operator releases their knee, enabling hands-free presser foot control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Functions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNeutral Positioning:\u003c\/strong\u003e Ensures that once you stop pressing the knee pad, the presser foot returns to the \"down\" position on the fabric, maintaining consistent pressure for quality stitching.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSystem Tension:\u003c\/strong\u003e Maintains the necessary tension within the knee lift assembly to prevent the linkage from rattling or hanging loosely under the machine table, ensuring smooth and quiet operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdjustment Support:\u003c\/strong\u003e Works in conjunction with the stop-adjustment bolts to ensure a smooth arc of motion, allowing for precise control of the presser foot height without hand intervention.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen to Replace:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace this spring if your knee lift feels loose, doesn't return to neutral position properly, or if you notice rattling in the knee lift assembly. A worn spring can cause inconsistent presser foot pressure and reduce sewing precision.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible Singer Industrial Models:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSinger 241 Series:\u003c\/strong\u003e 241-11, 241-12, and other 241 variants\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSinger 251 Series:\u003c\/strong\u003e High-speed straight stitch industrial machines\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSinger 281 Series:\u003c\/strong\u003e Heavy-duty industrial models\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGeneric Compatibility:\u003c\/strong\u003e Also fits generic knee lifter brackets and low knee lift brackets used on industrial tables housing various brands.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProfessional Tip:\u003c\/strong\u003e When replacing this spring, check the entire knee lift assembly for wear, including the rocker shaft and adjustment bolts. Proper tension adjustment ensures optimal hands-free presser foot control for production sewing.\u003c\/p\u003e","brand":"DMN","offers":[{"title":"Default Title","offer_id":42561461747810,"sku":"143286","price":3.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/4681\/files\/IMG_2437.jpg?v=1771002317","url":"https:\/\/www.vintagesingerparts.com\/en-nz\/products\/rocker-shaft-spring-143286-knee-lift-return-spring-for-singer-industrial","provider":"Central Michigan Sewing Supplies","version":"1.0","type":"link"}