{"product_id":"original-singer-bobbin-winder-mechanism-model-66-early-cam-style","title":"Original Singer Bobbin Winder Mechanism - Model 66 Early Cam Style","description":"\u003ch3\u003eOriginal Singer Bobbin Winder Mechanism - Model 66 Early Cam Style\u003c\/h3\u003e\n\u003cp\u003eReplacement bobbin winder mechanism for Singer Model 66 machines with early cam-style winders (approximately 1910-late 1930s). This is the core winder mechanism only - the frame, cam drive, hub, shaft, thread guide finger, and spring - without the decorative handwheel guard or mounting hardware.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included - Core Mechanism Only\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCast Iron Frame:\u003c\/strong\u003e L-shaped mounting bracket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeart-Shaped Cam Gear:\u003c\/strong\u003e Internal cam mechanism that drives the oscillating finger\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHub and Shaft Assembly:\u003c\/strong\u003e Complete hub with drive pin and shaft\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Guide Finger:\u003c\/strong\u003e Metal oscillating finger for automatic level-wind\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne (1) Spring:\u003c\/strong\u003e Thread guide spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Friction Tire:\u003c\/strong\u003e Fresh rubber tire installed on hub\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreed Mechanism:\u003c\/strong\u003e Cam and gears freed and working smoothly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's NOT Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHandwheel guard with decals (sold separately)\u003c\/li\u003e\n\u003cli\u003eMounting hardware\/screws\u003c\/li\u003e\n\u003cli\u003eAdditional tension springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy You Need This Mechanism\u003c\/h3\u003e\n\u003cp\u003eAfter 80-100+ years of use, several common failure points can make your original bobbin winder unusable:\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBroken Drive Pin:\u003c\/strong\u003e The small pin that drives the bobbin when you slide it onto the shaft is a wear item. After decades of use, this pin can wear down or break completely, making it impossible to wind bobbins.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCracked Cast Iron Frame:\u003c\/strong\u003e It's not uncommon for vintage machines to get tipped over during moves or storage. The cast iron winder frame is brittle and can crack or break on impact, making the entire mechanism unusable.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrozen Cam Mechanism:\u003c\/strong\u003e The heart-shaped cam and internal gears often seize from century-old hardened oil. While some can be freed with disassembly and cleaning, severely corroded units may be beyond repair.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWorn Friction Tire:\u003c\/strong\u003e Original rubber tires dry out, crack, and lose their grip after 80+ years. This mechanism includes a new friction tire already installed.\u003c\/p\u003e\n\n\u003cp\u003eThis replacement mechanism solves all these issues - you get a complete working unit with freed cam gears, intact drive pin, solid frame, and new friction tire.\u003c\/p\u003e\n\n\u003ch3\u003eEarly Cam-Style \"Level-Wind\" Mechanism\u003c\/h3\u003e\n\u003cp\u003eThis is the early, mechanically sophisticated version of the Model 66 bobbin winder featuring the heart-shaped cam system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAutomatic Level-Wind:\u003c\/strong\u003e The internal heart-shaped cam rotates as you wind, driving the metal thread guide finger back and forth automatically. This ensures perfectly even thread distribution across the bobbin without any manual intervention - just like professional industrial machines.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuperior to Later Versions:\u003c\/strong\u003e Unlike the later simplified winders (66-14, 66-16) where you guide the thread by hand, this early cam-style does all the work for you. The oscillating finger prevents uneven winding that can cause tension problems during sewing.\u003c\/p\u003e\n\n\u003ch3\u003eFriction Tire Drive System\u003c\/h3\u003e\n\u003cp\u003eThis mechanism uses a friction tire (rubber tire) that presses against the handwheel rim to power the winder.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Friction Tire:\u003c\/strong\u003e Fresh rubber tire installed and ready to use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandwheel Compatibility:\u003c\/strong\u003e Works with both 9-spoke and solid handwheels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile:\u003c\/strong\u003e Compatible with treadle, hand-crank, and electric Model 66 machines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Pin Intact:\u003c\/strong\u003e Small pin that engages the bobbin is present and functional\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eMechanism Fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSinger Model 66-1 (treadle version)\u003c\/li\u003e\n\u003cli\u003eSinger Model 66-3 (hand-crank version)\u003c\/li\u003e\n\u003cli\u003eSinger Model 66-4 (early electric with spoked handwheel)\u003c\/li\u003e\n\u003cli\u003eSinger Model 66-5 (hand-crank variant of 66-4)\u003c\/li\u003e\n\u003cli\u003eSinger Model 66-6 (electric with solid handwheel)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eEra:\u003c\/strong\u003e Early Model 66 machines from approximately 1910-late 1930s, characterized by screw-style stitch length adjuster and back-clamping or early side-clamping presser foot systems. These machines may have Red Eye, Lotus, or Filigree decals.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e This is the early cam-style mechanism, NOT the later simplified version found on 66-14 or 66-16 models from the late 1930s-1940s.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Requirements\u003c\/h3\u003e\n\u003cp\u003eThis is a mechanism-only replacement. You will need:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYour existing handwheel guard (or purchase separately)\u003c\/li\u003e\n\u003cli\u003eMounting hardware\/screws to attach the frame to your machine\u003c\/li\u003e\n\u003cli\u003eBasic hand tools for installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe mechanism mounts to the machine's pillar or arm using the cast iron frame. Proper alignment is critical so the friction tire engages the handwheel rim correctly.\u003c\/p\u003e\n\n\u003ch3\u003eCondition Grading System\u003c\/h3\u003e\n\u003cp\u003eSince these are vintage original mechanisms 80-100+ years old, condition varies. Select the grade that matches your restoration needs:\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eGrade A - Excellent Condition:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMinimal wear and patina\u003c\/li\u003e\n\u003cli\u003eCast iron frame solid with no cracks or repairs\u003c\/li\u003e\n\u003cli\u003eLittle to no rust or pitting\u003c\/li\u003e\n\u003cli\u003eDrive pin intact and sharp\u003c\/li\u003e\n\u003cli\u003eHeart-shaped cam and gears move freely and smoothly\u003c\/li\u003e\n\u003cli\u003eThread guide finger straight and functional\u003c\/li\u003e\n\u003cli\u003eSpring strong and functional\u003c\/li\u003e\n\u003cli\u003eNew friction tire installed\u003c\/li\u003e\n\u003cli\u003eReady to install and use immediately\u003c\/li\u003e\n\u003cli\u003eBest choice for museum-quality restorations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eGrade B - Very Good Condition:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLight to moderate patina consistent with age\u003c\/li\u003e\n\u003cli\u003eCast iron frame solid with no cracks\u003c\/li\u003e\n\u003cli\u003eSome surface rust or light pitting possible\u003c\/li\u003e\n\u003cli\u003eDrive pin intact and functional\u003c\/li\u003e\n\u003cli\u003eCam mechanism freed and working properly\u003c\/li\u003e\n\u003cli\u003eThread guide finger may show minor bending but functional\u003c\/li\u003e\n\u003cli\u003eSpring present and functional\u003c\/li\u003e\n\u003cli\u003eNew friction tire installed\u003c\/li\u003e\n\u003cli\u003eMay benefit from light cleaning or polishing\u003c\/li\u003e\n\u003cli\u003eGreat choice for working restorations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eGrade C - Good Condition:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eModerate to heavy patina, authentic vintage character\u003c\/li\u003e\n\u003cli\u003eCast iron frame solid (no cracks that affect function)\u003c\/li\u003e\n\u003cli\u003eVisible rust, pitting, or paint loss on metal components\u003c\/li\u003e\n\u003cli\u003eDrive pin intact and functional\u003c\/li\u003e\n\u003cli\u003eCam mechanism freed and working\u003c\/li\u003e\n\u003cli\u003eThread guide finger may show wear or bending but functional\u003c\/li\u003e\n\u003cli\u003eSpring present and functional\u003c\/li\u003e\n\u003cli\u003eNew friction tire installed\u003c\/li\u003e\n\u003cli\u003eMay require cleaning or minor adjustments for best performance\u003c\/li\u003e\n\u003cli\u003eBudget-friendly option for machines that need a working mechanism\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eAll grades are fully functional. The grading reflects cosmetic condition only. Every mechanism includes a freed cam system, intact drive pin, solid frame, thread guide spring, and new friction tire.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose Mechanism-Only?\u003c\/h3\u003e\n\u003cp\u003eThis listing is ideal if you:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAlready have the handwheel guard and just need the mechanism\u003c\/li\u003e\n\u003cli\u003eHave a broken frame, worn drive pin, or frozen cam on your original winder\u003c\/li\u003e\n\u003cli\u003eDon't care about period-correct decals on the guard\u003c\/li\u003e\n\u003cli\u003eWant to save money vs. buying the complete assembly with guard\u003c\/li\u003e\n\u003cli\u003eNeed a working winder and can source mounting hardware separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIf you need the complete assembly including the handwheel guard with authentic decals (Red Eye, Lotus, or Filigree), please see our separate listings for complete assemblies.\u003c\/p\u003e\n\n\u003ch3\u003eMaintenance \u0026amp; Care\u003c\/h3\u003e\n\u003cp\u003eApply a drop of sewing machine oil to the cam mechanism and shaft periodically to keep everything moving smoothly. Check the friction tire for wear over time - while this unit includes a new tire, rubber will eventually need replacement after years of use.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Singer Manufacturing Company (SIMANCO)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEra:\u003c\/strong\u003e Approximately 1910-late 1930s\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachine Model:\u003c\/strong\u003e Singer Model 66 (early sub-models)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssembly Type:\u003c\/strong\u003e Mechanism only (no guard or mounting hardware)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWinder Style:\u003c\/strong\u003e Early cam-style with heart-shaped cam and oscillating finger\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSprings:\u003c\/strong\u003e One (1) thread guide spring included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFriction Tire:\u003c\/strong\u003e New replacement tire installed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame Material:\u003c\/strong\u003e Cast iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandwheel Compatibility:\u003c\/strong\u003e 9-spoke or solid handwheels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Models:\u003c\/strong\u003e 66-1, 66-3, 66-4, 66-5, 66-6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Pin:\u003c\/strong\u003e Intact and functional\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approximately 4-5 oz\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Due to the vintage nature of these parts (80-100+ years old), each mechanism is unique. Your mechanism will match the condition grade description but may have slightly different patina patterns consistent with authentic vintage parts. Mounting hardware not included.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eReplace your broken or worn Model 66 bobbin winder mechanism with an authentic early cam-style unit featuring the sophisticated heart-shaped cam system!\u003c\/strong\u003e\u003c\/p\u003e","brand":"CMSS","offers":[{"title":"Grade A","offer_id":42602758733922,"sku":"VO1230","price":32.99,"currency_code":"USD","in_stock":false},{"title":"Grade B","offer_id":42602758766690,"sku":null,"price":28.99,"currency_code":"USD","in_stock":false},{"title":"Grade C","offer_id":42602758799458,"sku":null,"price":24.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/4681\/files\/IMG_6378-Photoroom.jpg?v=1772495231","url":"https:\/\/www.vintagesingerparts.com\/en-ca\/products\/original-singer-bobbin-winder-mechanism-model-66-early-cam-style","provider":"Central Michigan Sewing Supplies","version":"1.0","type":"link"}