{"product_id":"flexible-plum-spider-jaw-shaft-coupler-cnc-stepper-motor","title":"CNC Shaft Coupler Flexible Plum Spider Jaw Coupling Stepper Motor D14mm - 150mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eCNC Shaft Coupler Flexible Plum Spider Jaw Coupling — Precision Motion for Every Build\u003c\/h2\u003e\n    \u003cp\u003eWhen shaft misalignment, vibration, or angular offset causes premature wear on your CNC machine, 3D printer, or stepper motor drive system, the weak link is almost always the coupling. Engineers, makers, and automation builders who demand reliable torque transmission without sacrificing flexibility need a coupling that can handle real-world imperfections — and that's exactly what this flexible plum spider jaw shaft coupler is designed to do.\u003c\/p\u003e\n    \u003cp\u003eEach coupler consists of two aluminum alloy hubs and a polyurethane (PU) spider insert. The hubs are precision-machined from 6061-T6 aluminum alloy with a natural anodized finish, offering a lightweight yet rigid structure. The PU spider element sits between the jaws of both hubs, absorbing shock and compensating for parallel, angular, and axial misalignment. Available in coupler body diameters from 14mm to 105mm (0.55\" to 4.13\") and lengths from 22mm to 140mm (0.87\" to 5.51\"), with bore shaft diameter ranges from 3mm to 60mm (0.12\" to 2.36\") depending on the selected variant.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include CNC router Z-axis and lead screw connections, NEMA 17\/23\/34 stepper motor shaft coupling for 3D printers and laser engravers, servo motor coupling in pick-and-place automation systems, and flexible shaft coupling for DIY robotics and linear actuator assemblies.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e\n    Compatible with CNC routers, 3D printers, laser engravers, stepper \u0026amp; servo motors, and linear actuator systems. Select your coupler dimension and shaft diameter from the variant options above.\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These CNC Shaft Couplers\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-features\"\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e🔩\u003c\/div\u003e\n      \u003cstrong\u003eJaw Coupling Design\u003c\/strong\u003e\n      \u003cp\u003eThree-jaw interlocking hub geometry maximizes torque transfer while the PU spider insert absorbs shock loads and dampens vibration between connected shafts.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e📐\u003c\/div\u003e\n      \u003cstrong\u003eWide Size Range\u003c\/strong\u003e\n      \u003cp\u003e22 variants spanning coupler OD from 14mm to 105mm and shaft bore from 3mm to 60mm — covering NEMA 17 through large-frame servo motor applications in a single product line.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e🛡️\u003c\/div\u003e\n      \u003cstrong\u003eMisalignment Compensation\u003c\/strong\u003e\n      \u003cp\u003eAccommodates parallel misalignment up to typically 0.2–0.5mm, angular misalignment up to typically 1°–3°, and axial float, reducing bearing load and extending drivetrain life.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e⚡\u003c\/div\u003e\n      \u003cstrong\u003eAluminum Alloy Hubs\u003c\/strong\u003e\n      \u003cp\u003ePrecision-machined 6061-T6 aluminum hubs deliver a high strength-to-weight ratio, corrosion resistance, and dimensional stability across a wide operating temperature range.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e🔧\u003c\/div\u003e\n      \u003cstrong\u003eSet Screw Clamping\u003c\/strong\u003e\n      \u003cp\u003eEach hub is secured to the shaft via set screws, enabling tool-free shaft swaps and quick repositioning without permanent modification to the motor or lead screw shaft.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv\u003e\n      \u003cdiv class=\"hdiy-icon\"\u003e🔄\u003c\/div\u003e\n      \u003cstrong\u003eElectrically Isolating Spider\u003c\/strong\u003e\n      \u003cp\u003eThe polyurethane spider insert provides electrical isolation between the two hubs, protecting sensitive motor encoders and control electronics from ground loop interference.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — Flexible Plum Spider Jaw Shaft Coupler\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eCoupler Body Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003e14mm – 105mm (0.55\" – 4.13\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCoupler Body Length\u003c\/th\u003e\n\u003ctd\u003e22mm – 140mm (0.87\" – 5.51\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShaft Bore Diameter Range\u003c\/th\u003e\n\u003ctd\u003e3mm – 60mm (0.12\" – 2.36\") — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHub Material\u003c\/th\u003e\n\u003ctd\u003e6061-T6 Aluminum 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\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eNatural Anodized\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCoupling Type\u003c\/th\u003e\n\u003ctd\u003eFlexible Jaw \/ Plum Spider\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFastening Method\u003c\/th\u003e\n\u003ctd\u003eSet Screw\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMisalignment Tolerance (Parallel)\u003c\/th\u003e\n\u003ctd\u003eTypically 0.2–0.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMisalignment Tolerance (Angular)\u003c\/th\u003e\n\u003ctd\u003eTypically 1°–3°\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically –30°C to +100°C\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eNumber of Variants\u003c\/th\u003e\n\u003ctd\u003e22 sizes\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-faq\"\u003e\n    \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right coupler size for my stepper motor?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the coupler's shaft bore range to your motor shaft diameter and lead screw diameter. For example, a NEMA 17 stepper typically has a 5mm shaft — select a variant whose shaft bore range includes 5mm (e.g., D14mm x L22mm, bore 3–8mm). The coupler OD and length should fit within your motor mount clearance.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan this coupler handle both metric and imperial shaft sizes?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe bore is sized for metric shafts. Imperial shafts that fall within the listed bore range (e.g., 1\/4\" ≈ 6.35mm) can typically be accommodated, but verify the exact bore diameter of the selected variant against your shaft's imperial measurement before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow strong is the torque transmission through the PU spider?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe polyurethane spider insert is rated for moderate-to-high torque transmission suitable for CNC lead screws, 3D printer axes, and light servo applications. Exact torque ratings vary by coupler size — larger diameter couplers (D40mm and above) handle significantly higher torque loads than smaller variants.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this coupler corrosion-resistant for use in humid or outdoor environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe anodized 6061-T6 aluminum hubs offer good corrosion resistance for indoor and moderately humid environments. The anodizing layer protects against oxidation. For prolonged outdoor or salt-spray exposure, additional protective coating is recommended.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill this coupling work with both stepper motors and servo motors?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. The flexible jaw design is compatible with stepper motors (NEMA 17, 23, 34) and servo motors, provided the shaft diameter falls within the selected variant's bore range. The PU spider also helps dampen the torque ripple characteristic of stepper motors, reducing resonance in the drivetrain.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between the two shaft bore values listed per variant?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEach variant lists two bore values — one for each hub. For example, \"3mm to 8mm\" means one hub is bored to 3mm and the other to 8mm, allowing you to connect two shafts of different diameters. If you need both ends the same size, select a variant where both values match your shaft diameter, or contact us to confirm bore configuration.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I replace just the spider insert without buying a new coupler?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe PU spider insert is a wear component and can typically be replaced independently of the aluminum hubs. If the spider shows cracking or deformation from overload, replacing only the insert restores coupling performance without replacing the entire assembly.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your Coupler Dimension and Shaft Diameter above, then add to cart.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right coupler size for my stepper motor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the coupler's shaft bore range to your motor shaft diameter and lead screw diameter. For example, a NEMA 17 stepper typically has a 5mm shaft — select a variant whose shaft bore range includes 5mm (e.g., D14mm x L22mm, bore 3–8mm). The coupler OD and length should fit within your motor mount clearance.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this coupler handle both metric and imperial shaft sizes?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The bore is sized for metric shafts. Imperial shafts that fall within the listed bore range (e.g., 1\/4\\\" ≈ 6.35mm) can typically be accommodated, but verify the exact bore diameter of the selected variant against your shaft's imperial measurement before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong is the torque transmission through the PU spider?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The polyurethane spider insert is rated for moderate-to-high torque transmission suitable for CNC lead screws, 3D printer axes, and light servo applications. Exact torque ratings vary by coupler size — larger diameter couplers (D40mm and above) handle significantly higher torque loads than smaller variants.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this coupler corrosion-resistant for use in humid or outdoor environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The anodized 6061-T6 aluminum hubs offer good corrosion resistance for indoor and moderately humid environments. The anodizing layer protects against oxidation. For prolonged outdoor or salt-spray exposure, additional protective coating is recommended.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this coupling work with both stepper motors and servo motors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The flexible jaw design is compatible with stepper motors (NEMA 17, 23, 34) and servo motors, provided the shaft diameter falls within the selected variant's bore range. The PU spider also helps dampen the torque ripple characteristic of stepper motors, reducing resonance in the drivetrain.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between the two shaft bore values listed per variant?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Each variant lists two bore values — one for each hub. For example, '3mm to 8mm' means one hub is bored to 3mm and the other to 8mm, allowing you to connect two shafts of different diameters. If you need both ends the same size, select a variant where both values match your shaft diameter, or contact us to confirm bore configuration.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I replace just the spider insert without buying a new coupler?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The PU spider insert is a wear component and can typically be replaced independently of the aluminum hubs. If the spider shows cracking or deformation from overload, replacing only the insert restores coupling performance without replacing the entire assembly.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"D14mm x L22mm \/ 3mm to 8mm","offer_id":52421722669330,"sku":"SSJWYXKJGK0001x1","price":7.41,"currency_code":"USD","in_stock":true},{"title":"D14mm x L22mm \/ 3mm to 6mm","offer_id":52421722702098,"sku":"SSJWYXKJGK0002x1","price":7.41,"currency_code":"USD","in_stock":true},{"title":"D20mm x L25mm \/ 4mm to 10mm","offer_id":52421722734866,"sku":"SSJWYXKJGK0003x1","price":7.98,"currency_code":"USD","in_stock":true},{"title":"D20mm x L30mm \/ 4mm to 10mm","offer_id":52421722767634,"sku":"SSJWYXKJGK0004x1","price":8.27,"currency_code":"USD","in_stock":true},{"title":"D25mm x L30mm \/ 5mm to 14mm","offer_id":52421722800402,"sku":"SSJWYXKJGK0005x1","price":8.8,"currency_code":"USD","in_stock":true},{"title":"D25mm x L35mm \/ 5mm to 14mm","offer_id":52421722833170,"sku":"SSJWYXKJGK0006x1","price":10.47,"currency_code":"USD","in_stock":true},{"title":"D30mm x L35mm \/ 5mm to 16mm","offer_id":52421722865938,"sku":"SSJWYXKJGK0007x1","price":12.95,"currency_code":"USD","in_stock":true},{"title":"D30mm x L40mm \/ 5mm to 16mm","offer_id":52421722898706,"sku":"SSJWYXKJGK0008x1","price":13.8,"currency_code":"USD","in_stock":true},{"title":"D35mm x L50mm \/ 6mm to 19mm","offer_id":52421722931474,"sku":"SSJWYXKJGK0009x1","price":16.16,"currency_code":"USD","in_stock":true},{"title":"D35mm x L60mm \/ 6mm to 19mm","offer_id":52421722964242,"sku":"SSJWYXKJGK0010x1","price":17.31,"currency_code":"USD","in_stock":true},{"title":"D40mm x L50mm \/ 6mm to 22mm","offer_id":52421722997010,"sku":"SSJWYXKJGK0011x1","price":19.65,"currency_code":"USD","in_stock":true},{"title":"D40mm x L55mm \/ 6mm to 22mm","offer_id":52421723029778,"sku":"SSJWYXKJGK0012x1","price":20.81,"currency_code":"USD","in_stock":true},{"title":"D40mm x L66mm \/ 6mm to 22mm","offer_id":52421723062546,"sku":"SSJWYXKJGK0013x1","price":22.55,"currency_code":"USD","in_stock":true},{"title":"D40mm x L78mm \/ 8mm to 22mm","offer_id":52421723095314,"sku":"SSJWYXKJGK0014x1","price":28.34,"currency_code":"USD","in_stock":true},{"title":"D45mm x L66mm \/ 6mm to 25mm","offer_id":52421723128082,"sku":"SSJWYXKJGK0015x1","price":33.5,"currency_code":"USD","in_stock":true},{"title":"D45mm x L78mm \/ 10mm to 25mm","offer_id":52421723160850,"sku":"SSJWYXKJGK0016x1","price":35.86,"currency_code":"USD","in_stock":true},{"title":"D55mm x L66mm \/ 12mm to 30mm","offer_id":52421723193618,"sku":"SSJWYXKJGK0017x1","price":43.4,"currency_code":"USD","in_stock":true},{"title":"D55mm x L78mm \/ 14mm to 28mm","offer_id":52421723226386,"sku":"SSJWYXKJGK0018x1","price":48.59,"currency_code":"USD","in_stock":true},{"title":"D65mm x L90mm \/ 14mm to 35mm","offer_id":52421723259154,"sku":"SSJWYXKJGK0019x1","price":76.43,"currency_code":"USD","in_stock":true},{"title":"D80mm x L114mm \/ 24mm to 45mm","offer_id":52421723291922,"sku":"SSJWYXKJGK0020x1","price":131.57,"currency_code":"USD","in_stock":true},{"title":"D95mm x L126mm \/ 30mm to 55mm","offer_id":52421723324690,"sku":"SSJWYXKJGK0021x1","price":209.62,"currency_code":"USD","in_stock":true},{"title":"D105mm x L140mm \/ 35mm to 60mm","offer_id":52421723357458,"sku":"SSJWYXKJGK0022x1","price":324.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture5of33_45d4ea7f-e2b6-43f6-9941-5b9dcfdbae20.jpg?v=1783069391","url":"https:\/\/homediyer.com\/products\/flexible-plum-spider-jaw-shaft-coupler-cnc-stepper-motor","provider":"HomeDIYer","version":"1.0","type":"link"}