{"product_id":"cnc-shaft-flexible-plum-spider-jaw-coupling-stepper-motor-3d-printer-14mm-105mm","title":"CNC Shaft Flexible Plum Spider Jaw Coupling Stepper Motor 3D Printer 14mm-105mm","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eFlexible Plum Spider Jaw Shaft Couplings — Precision Motion for CNC, Stepper Motors \u0026amp; 3D Printers\u003c\/h2\u003e\n\u003cp\u003eWhen shaft misalignment, vibration, or backlash disrupts your CNC router, stepper motor drive, or 3D printer axis, the coupling is often the first component to blame — and the easiest to fix. These flexible plum spider jaw shaft couplings are engineered for DIY builders, machine retrofitters, and motion-control engineers who need reliable torque transmission without sacrificing flexibility or precision.\u003c\/p\u003e\n\u003cp\u003eEach coupling consists of two aluminum alloy hubs and a polyurethane (PU) spider insert. The outer diameter ranges from 14 mm to 105 mm (approximately 0.55 in to 4.13 in), with lengths from 22 mm to 140 mm (approximately 0.87 in to 5.51 in). Bore diameters are available across a wide range — see variant options for exact bore sizing. The spider element is available in standard elasticity grades suited to general motion-control applications.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include Z-axis and lead-screw couplings on desktop CNC mills, stepper motor shaft connections on 3D printer gantry systems, and servo motor drives on laser engravers or plasma tables. The jaw-and-spider design makes these flexible plum couplings a go-to choice for low-backlash shaft coupling in DIY automation and light industrial motion systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eCompatible with:\u003c\/strong\u003e NEMA 17 \/ NEMA 23 stepper motors, standard CNC lead screws, 3D printer Z-axis rods, servo motor shafts, and encoder drives with matching bore diameters. Verify your shaft diameter before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Flexible Plum Spider Jaw Shaft Couplings\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eJaw-and-Spider Design:\u003c\/strong\u003e The split two-piece hub with polyurethane spider insert absorbs angular, parallel, and axial misalignment, protecting motors and bearings from shock loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003eLow Backlash Torque Transmission:\u003c\/strong\u003e The interference-fit spider element minimizes rotational play, making these flexible plum couplings suitable for position-critical CNC and 3D printer applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eWide Size Range:\u003c\/strong\u003e Available from D14×L22 up to D105×L140, covering the most common stepper motor and servo shaft diameters used in DIY and light industrial motion systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eAluminum Alloy Hubs:\u003c\/strong\u003e Lightweight yet rigid aluminum hubs resist deformation under torque, maintaining concentricity across the coupling's operating life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eEasy Spider Replacement:\u003c\/strong\u003e The spider insert can be replaced without removing the hubs from the shafts, reducing downtime during maintenance or elasticity-grade changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cstrong\u003eSet-Screw Clamping:\u003c\/strong\u003e Each hub is secured to the shaft via set screws. Confirm your bore diameter and shaft flat (if any) match the selected variant before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Flexible Plum Spider Jaw Shaft Coupling\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eCoupling Type\u003c\/th\u003e\n\u003ctd\u003eJaw \/ Spider (Plum) Flexible Coupling\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\u003eOuter Diameter (D)\u003c\/th\u003e\n\u003ctd\u003e14 mm – 105 mm (0.55 in – 4.13 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOverall Length (L)\u003c\/th\u003e\n\u003ctd\u003e22 mm – 140 mm (0.87 in – 5.51 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eClamping Method\u003c\/th\u003e\n\u003ctd\u003eSet Screw\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\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eNatural Anodized \/ Mill Finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 pcs (per variant)\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 right coupler dimension for my stepper motor?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the outer diameter (D) and length (L) to your motor flange clearance and shaft-to-shaft distance. More importantly, confirm the bore diameter matches your motor shaft and lead screw shaft. The \"Bore Remarks\" option on this listing means bore sizes vary by dimension — contact us or check the variant detail to confirm the available bore range for your chosen D×L size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat shaft diameters are compatible with these couplings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCompatible bore diameters vary by coupler dimension. Smaller sizes (e.g., D14×L22) typically accommodate shafts from 3 mm to 8 mm, while larger sizes (e.g., D105×L140) can accept shafts up to 40 mm or more. Please confirm the bore range for your selected variant before ordering — select \"Bore Remarks\" and contact us with your shaft diameter for exact confirmation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these couplings handle angular and parallel misalignment?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The polyurethane spider insert allows the jaw coupling to absorb angular misalignment (typically up to 1°), parallel offset, and axial displacement. This makes it well-suited for CNC and 3D printer applications where perfect shaft alignment is difficult to achieve during assembly. For heavy misalignment, consider a beam or Oldham coupling instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these couplings suitable for high-speed applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese flexible plum spider jaw couplings are designed for low-to-medium speed motion-control applications typical of CNC routers, 3D printers, and stepper\/servo motor drives. For very high RPM applications (above approximately 3,000 RPM), verify the specific size's rated speed with us before ordering, as larger diameter couplings have lower maximum speed ratings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are the aluminum hubs — will they deform under load?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe hubs are machined from aluminum alloy, which provides a strong, rigid connection under the torque loads typical of NEMA 17 and NEMA 23 stepper motors and equivalent servo drives. The spider insert acts as the sacrificial element — it absorbs shock and vibration before the hubs or motor shafts are stressed. For very high-torque industrial drives, contact us to confirm the torque rating for your selected size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I replace just the spider insert without removing the hubs?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes — this is one of the key advantages of the jaw coupling design. The polyurethane spider insert slides out radially once the two hubs are slightly separated, so you can swap the insert without loosening the set screws or removing the hubs from the shafts. This makes maintenance fast and minimizes machine downtime.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the various D×L size options?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e\"D\" refers to the outer diameter of the coupling body, and \"L\" refers to the total assembled length. A larger D generally means a higher torque capacity and larger bore range. A longer L provides more axial flexibility and is useful when the shaft-to-shaft gap is larger. Choose the smallest D that accommodates your bore diameter to keep rotating mass low and response fast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Coupler Dimension and Shaft Diameter above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"D14 × L22 \/ 1 pcs \/ Bore Remarks","offer_id":52421838110994,"sku":"GYLXSHXJZC1091x1","price":9.49,"currency_code":"USD","in_stock":true},{"title":"D20 × L25 \/ 1 pcs \/ Bore Remarks","offer_id":52421838143762,"sku":"GYLXSHXJZC1092x1","price":11.34,"currency_code":"USD","in_stock":true},{"title":"D20 × L30 \/ 1 pcs \/ Bore Remarks","offer_id":52421838176530,"sku":"GYLXSHXJZC1093x1","price":11.34,"currency_code":"USD","in_stock":true},{"title":"D20 × L34 \/ 1 pcs \/ Bore Remarks","offer_id":52421838209298,"sku":"GYLXSHXJZC1094x1","price":11.34,"currency_code":"USD","in_stock":true},{"title":"D25 × L30 \/ 1 pcs \/ Bore Remarks","offer_id":52421838242066,"sku":"GYLXSHXJZC1095x1","price":12.02,"currency_code":"USD","in_stock":true},{"title":"D25 × L34 \/ 1 pcs \/ Bore Remarks","offer_id":52421838274834,"sku":"GYLXSHXJZC1096x1","price":11.9,"currency_code":"USD","in_stock":true},{"title":"D30 × L35 \/ 1 pcs \/ Bore Remarks","offer_id":52421838307602,"sku":"GYLXSHXJZC1097x1","price":12.74,"currency_code":"USD","in_stock":true},{"title":"D30 × L42 \/ 1 pcs \/ Bore Remarks","offer_id":52421838340370,"sku":"GYLXSHXJZC1098x1","price":13.42,"currency_code":"USD","in_stock":true},{"title":"D35 × L50 \/ 1 pcs \/ Bore Remarks","offer_id":52421838373138,"sku":"GYLXSHXJZC1099x1","price":16.66,"currency_code":"USD","in_stock":true},{"title":"D40 × L45 \/ 1 pcs \/ Bore Remarks","offer_id":52421838405906,"sku":"GYLXSHXJZC1100x1","price":18.74,"currency_code":"USD","in_stock":true},{"title":"D40 × L50 \/ 1 pcs \/ Bore Remarks","offer_id":52421838438674,"sku":"GYLXSHXJZC1101x1","price":19.01,"currency_code":"USD","in_stock":true},{"title":"D40 × L55 \/ 1 pcs \/ Bore Remarks","offer_id":52421838471442,"sku":"GYLXSHXJZC1102x1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"D40 × L66 \/ 1 pcs \/ Bore Remarks","offer_id":52421838504210,"sku":"GYLXSHXJZC1103x1","price":23.22,"currency_code":"USD","in_stock":true},{"title":"D40 × L78 \/ 1 pcs \/ Bore Remarks","offer_id":52421838536978,"sku":"GYLXSHXJZC1104x1","price":28.82,"currency_code":"USD","in_stock":true},{"title":"D40 × L85 \/ 1 pcs \/ Bore Remarks","offer_id":52421838569746,"sku":"GYLXSHXJZC1105x1","price":30.5,"currency_code":"USD","in_stock":true},{"title":"D45 × L66 \/ 1 pcs \/ Bore Remarks","offer_id":52421838602514,"sku":"GYLXSHXJZC1106x1","price":31.51,"currency_code":"USD","in_stock":true},{"title":"D45 × L55 \/ 1 pcs \/ Bore Remarks","offer_id":52421838635282,"sku":"GYLXSHXJZC1107x1","price":27.98,"currency_code":"USD","in_stock":true},{"title":"D45 × L75 \/ 1 pcs \/ Bore Remarks","offer_id":52421838668050,"sku":"GYLXSHXJZC1108x1","price":34.15,"currency_code":"USD","in_stock":true},{"title":"D45 × L85 \/ 1 pcs \/ Bore Remarks","offer_id":52421838700818,"sku":"GYLXSHXJZC1109x1","price":38.34,"currency_code":"USD","in_stock":true},{"title":"D55 × L66 \/ 1 pcs \/ Bore Remarks","offer_id":52421838733586,"sku":"GYLXSHXJZC1110x1","price":44.51,"currency_code":"USD","in_stock":true},{"title":"D55 × L78 \/ 1 pcs \/ Bore Remarks","offer_id":52421838766354,"sku":"GYLXSHXJZC1111x1","price":50.55,"currency_code":"USD","in_stock":true},{"title":"D55 × L110 \/ 1 pcs \/ Bore Remarks","offer_id":52421838799122,"sku":"GYLXSHXJZC1112x1","price":72.52,"currency_code":"USD","in_stock":true},{"title":"D65 × L90 \/ 1 pcs \/ Bore Remarks","offer_id":52421838831890,"sku":"GYLXSHXJZC1113x1","price":78.01,"currency_code":"USD","in_stock":true},{"title":"D65 × L110 \/ 1 pcs \/ Bore Remarks","offer_id":52421838864658,"sku":"GYLXSHXJZC1114x1","price":97.16,"currency_code":"USD","in_stock":true},{"title":"D80 × L114 \/ 1 pcs \/ Bore Remarks","offer_id":52421838897426,"sku":"GYLXSHXJZC1115x1","price":129.09,"currency_code":"USD","in_stock":true},{"title":"D95 × L126 \/ 1 pcs \/ Bore Remarks","offer_id":52421838930194,"sku":"GYLXSHXJZC1116x1","price":228.97,"currency_code":"USD","in_stock":true},{"title":"D105 × L140 \/ 1 pcs \/ Bore Remarks","offer_id":52421838962962,"sku":"GYLXSHXJZC1117x1","price":344.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of9_8ae9e769-94ee-41e6-840b-597db24f32de.jpg?v=1783333930","url":"https:\/\/homediyer.com\/products\/cnc-shaft-flexible-plum-spider-jaw-coupling-stepper-motor-3d-printer-14mm-105mm","provider":"HomeDIYer","version":"1.0","type":"link"}