{"product_id":"d45mm-l66mm-flexible-plum-shaft-coupler-cnc-stepper-motor-jaw-spider","title":"D45mm L66mm Shaft Coupler Flexible Plum Coupling CNC Stepper Motor Jaw Spider","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eD45mm L66mm Flexible Plum Shaft Coupler — Precision Motion for CNC \u0026amp; Stepper Motor Builds\u003c\/h2\u003e\n\u003cp\u003eWhen shaft misalignment causes vibration, noise, or premature wear in your CNC router, 3D printer, or stepper motor drive system, the weak link is almost always the coupling. Engineers and DIY builders who demand smooth, low-backlash power transmission need a coupling that compensates for angular, parallel, and axial misalignment without sacrificing torque capacity. This D45mm L66mm jaw spider shaft coupler is engineered for exactly that role.\u003c\/p\u003e\n\u003cp\u003eThe coupler consists of two aluminum alloy hubs (outer diameter 45mm \/ 1.77 in, length 66mm \/ 2.60 in total) joined by a polyurethane spider insert. Bore options span 6mm to 25mm (0.24–0.98 in) on each side, with both same-bore and cross-bore combinations available across 210 variants. Each hub is secured to the shaft via a clamping screw arrangement. The spider insert sits between the two hubs, transmitting torque while absorbing shock and damping vibration.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include CNC stepper motor shaft coupling for lead screw drives, servo motor connections in automation rigs, and flexible coupling for 3D printer Z-axis assemblies. The jaw-type plum coupling design is also widely used in laser engraver axis drives and small milling machine spindle connections where low backlash flexible coupling is critical.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits NEMA 17, NEMA 23, and similar stepper\/servo motors with shaft diameters from 6mm to 25mm. Verify both shaft diameters before selecting your variant.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Flexible Plum Shaft Couplers\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔩\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWide Bore Range — 6mm to 25mm\u003c\/strong\u003e\u003cbr\u003e210 shaft diameter combinations available, covering same-bore and cross-bore pairings from 6×6mm up to 24×25mm.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eD45mm × L66mm Compact Form Factor\u003c\/strong\u003e\u003cbr\u003eOuter diameter 45mm (1.77 in), total length 66mm (2.60 in) — fits tight motor-to-leadscrew spaces without clearance issues.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🌀\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePolyurethane Spider Insert\u003c\/strong\u003e\u003cbr\u003eThe elastomeric plum insert absorbs shock loads and damps vibration, protecting motor bearings and reducing resonance in high-speed CNC applications.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e⚡\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eLow Backlash Jaw Coupling Design\u003c\/strong\u003e\u003cbr\u003eThe three-jaw interlocking hub geometry minimizes rotational play, maintaining positioning accuracy in stepper motor lead screw drives.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🛡️\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAluminum Alloy Hubs\u003c\/strong\u003e\u003cbr\u003eLightweight yet rigid aluminum construction resists deformation under clamping torque and maintains concentricity across the bore range.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv class=\"hdiy-icon\"\u003e🔧\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eClamp-Style Shaft Retention\u003c\/strong\u003e\u003cbr\u003eSet screw clamping on each hub provides secure shaft grip without requiring keyways, simplifying installation on smooth motor shafts.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Flexible Plum Jaw Shaft Coupler\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eOuter Diameter (D)\u003c\/th\u003e\n\u003ctd\u003e45mm (1.77 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal Length (L)\u003c\/th\u003e\n\u003ctd\u003e66mm (2.60 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Range (each side)\u003c\/th\u003e\n\u003ctd\u003e6mm – 25mm (0.24–0.98 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Configuration\u003c\/th\u003e\n\u003ctd\u003eSame-bore and cross-bore combinations available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHub Material\u003c\/th\u003e\n\u003ctd\u003eAluminum alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSpider Insert Material\u003c\/th\u003e\n\u003ctd\u003ePolyurethane (PU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCoupling Type\u003c\/th\u003e\n\u003ctd\u003eJaw \/ Plum \/ Spider flexible coupling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShaft Retention\u003c\/th\u003e\n\u003ctd\u003eSet screw clamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMisalignment Tolerance\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Torque\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 Pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the correct shaft diameter combination?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure both shafts you need to connect — the motor shaft and the lead screw or driven shaft — using a digital caliper. Select the variant that matches both diameters exactly (e.g., 8mm × 10mm means one side fits an 8mm shaft and the other fits a 10mm shaft). If both shafts are the same size, choose a same-bore variant such as 8mm × 8mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill this coupler work with NEMA 17 and NEMA 23 stepper motors?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. NEMA 17 motors typically have a 5mm shaft, but many upgraded versions use 6mm or 8mm shafts. NEMA 23 motors commonly use 6.35mm (1\/4 in) or 8mm shafts. Select the bore variant that matches your specific motor shaft diameter. The D45mm outer diameter provides sufficient clearance for standard motor face mounts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong is this coupling — can it handle high-torque applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe aluminum alloy hubs provide rigid torque transmission, while the polyurethane spider insert handles shock absorption. For exact torque ratings, refer to the variant specifications or contact us to confirm suitability for your specific load. This coupling is well-suited for CNC routers, 3D printers, laser engravers, and light milling applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this coupling resistant to corrosion and chemicals?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe aluminum alloy hubs offer good natural corrosion resistance suitable for indoor workshop and light industrial environments. The polyurethane spider insert resists oils and mild solvents. For harsh chemical or outdoor environments, contact us to confirm compatibility before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat types of misalignment can this flexible coupling compensate for?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe jaw spider design compensates for angular misalignment (shafts at a slight angle to each other), parallel misalignment (shafts offset laterally), and axial misalignment (slight end-play between shafts). The polyurethane insert flexes to absorb these deviations without transmitting stress to motor bearings or lead screw nuts. Exact tolerance values depend on the specific bore size — contact us for details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need any special tools to install this coupler?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo special tools are required. Slide each hub onto its respective shaft, align the coupler, then tighten the set screws using a standard hex key (Allen wrench). Ensure the spider insert is seated evenly between both hubs before final tightening. No keyway machining is needed for smooth motor shafts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I replace just the spider insert if it wears out?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe polyurethane spider insert is the wear component in a jaw coupling. In many cases the insert can be replaced independently without replacing the aluminum hubs. Contact us with your coupler dimensions to confirm insert availability for your specific D45mm L66mm variant.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your shaft diameter combination above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"6mm X 6mm \/ 1 Pcs","offer_id":52421827264786,"sku":"LRP19069x1","price":53.04,"currency_code":"USD","in_stock":true},{"title":"7mm X 7mm \/ 1 Pcs","offer_id":52421827297554,"sku":"LRP19070x1","price":53.04,"currency_code":"USD","in_stock":true},{"title":"8mm X 8mm \/ 1 Pcs","offer_id":52421827330322,"sku":"LRP19071x1","price":53.04,"currency_code":"USD","in_stock":true},{"title":"9mm X 9mm \/ 1 Pcs","offer_id":52421827363090,"sku":"LRP19072x1","price":53.04,"currency_code":"USD","in_stock":true},{"title":"10mm X 10mm \/ 1 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