{"product_id":"l-type-cnc-shaft-coupler-flexible-plum-spider-jaw-coupling-stepper-motor-3d","title":"L-Type CNC Shaft Coupler Flexible Plum Spider Jaw Coupling Stepper Motor 3D","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eL-Type CNC Shaft Coupler — Flexible Plum Spider Jaw Coupling for Stepper Motors \u0026amp; 3D Printers\u003c\/h2\u003e\n    \u003cp\u003eWhen rigid couplings cause vibration, noise, or premature bearing wear in your CNC router, 3D printer, or automation rig, the root cause is almost always shaft misalignment. Engineers and makers who demand smooth, low-backlash motion need a coupling that absorbs angular and parallel offset without sacrificing torque transmission. This L-type jaw coupling is designed for exactly that use case.\u003c\/p\u003e\n    \u003cp\u003eEach set consists of two aluminum alloy hubs (L-type jaw profile) and one polyurethane plum blossom spider insert. The hubs are available in outer diameters of 35 mm (~1.38 in), 45 mm (~1.77 in), 55 mm (~2.17 in), and 65 mm (~2.56 in), with bore options ranging from 8 mm to 28 mm including standard keyway configurations (4 mm, 5 mm, and 8 mm keyways). No-hole blanks are also available for custom machining.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include NEMA 17\/23\/34 stepper motor shaft connections on 3D printers and CNC machines, servo motor couplings in pick-and-place automation, lead screw and ball screw drive connections, and general-purpose flexible shaft coupling for light industrial equipment where vibration damping is required.\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 NEMA 17, NEMA 23, and NEMA 34 stepper motors · Fits standard metric keyway shafts · Suitable for CNC routers, 3D printers, laser engravers, and light automation systems\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These L-Type CNC Shaft Couplers\u003c\/h2\u003e\n    \u003cdiv class=\"hdiy-list\"\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n        \u003cstrong\u003eJaw-Type Flexible Design\u003c\/strong\u003e — The L-type jaw profile interlocks with the polyurethane spider insert to transmit torque while absorbing angular misalignment (typically up to 1°) and parallel offset, protecting bearings and encoders from shock loads.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\n        \u003cstrong\u003eVibration \u0026amp; Shock Damping\u003c\/strong\u003e — The polyurethane plum blossom spider insert acts as a flexible buffer between the two hubs, reducing transmitted vibration and audible noise — critical for precision CNC and 3D printing applications.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\n        \u003cstrong\u003eWide Bore \u0026amp; Keyway Range\u003c\/strong\u003e — Available in bore sizes from 8 mm to 28 mm with keyway options (4 mm, 5 mm, 8 mm) to match standard metric shafts. No-hole blanks available for custom bore machining to exact tolerances.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\n        \u003cstrong\u003eLightweight Aluminum Hubs\u003c\/strong\u003e — Hubs are machined from aluminum alloy for a balance of strength and low rotational inertia, reducing load on stepper and servo motor bearings during direction changes.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003eMultiple OD Options\u003c\/strong\u003e — Choose from 35 mm, 45 mm, 55 mm, and 65 mm outer diameters to match your shaft center distance and housing clearance requirements across different machine frames.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n        \u003cstrong\u003eReplaceable Spider Insert\u003c\/strong\u003e — The plum blossom polyurethane insert is a separate, replaceable component. When the elastomer wears, only the insert needs replacement — not the entire coupling assembly — reducing long-term maintenance cost.\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — L-Type Jaw Shaft Coupler\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eCoupling Type\u003c\/th\u003e\n\u003ctd\u003eL-Type Jaw \/ Plum Spider (Oldham-style flexible)\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 (OD)\u003c\/th\u003e\n\u003ctd\u003e35 mm \/ 45 mm \/ 55 mm \/ 65 mm — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter\u003c\/th\u003e\n\u003ctd\u003e8 mm – 28 mm (with keyway) or No Holes — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eKeyway Options\u003c\/th\u003e\n\u003ctd\u003e4 mm, 5 mm, 8 mm — See variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural anodized \/ mill finish aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMisalignment Tolerance\u003c\/th\u003e\n\u003ctd\u003eAngular: typically up to 1° · Parallel: typically up to 0.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 PCS (hub set + spider insert)\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      \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 outer diameter (OD) for my application?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the OD to your shaft center distance and housing clearance. The 35 mm OD suits compact NEMA 17 stepper setups; 45 mm and 55 mm fit NEMA 23 and mid-frame servos; 65 mm is suited to larger NEMA 34 or industrial servo motors. If in doubt, measure the flange or bearing housing clearance on your machine frame before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat bore size and keyway should I select?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eSelect the bore that matches your motor or lead screw shaft diameter. For plain round shafts, choose the matching bore without a keyway. For keyed shafts, match both the bore diameter and keyway width (4 mm, 5 mm, or 8 mm). If you need a non-standard bore, order the No Holes blank and machine it to your exact specification.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan this coupling handle the torque of my stepper or servo motor?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe aluminum jaw hubs are designed for light-to-medium duty torque transmission typical of CNC stepper motors (NEMA 17–34) and small servo motors. For exact torque ratings by size, please contact us to confirm — torque capacity varies by OD and bore configuration and we can advise based on your specific motor specs.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs the spider insert included, and can it be replaced separately?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — each order includes both aluminum hubs and one polyurethane plum blossom spider insert. The spider insert is a separate, replaceable component. You can also order the 35 mm or 55 mm Diameter Plum Blossom Mat variants individually as replacement inserts without purchasing new hubs.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow corrosion-resistant are the aluminum hubs?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe hubs are machined from aluminum alloy which offers good natural corrosion resistance for indoor and light-duty environments. For applications exposed to moisture, coolant mist (e.g., CNC wet cutting), or outdoor conditions, we recommend applying a light coat of anti-corrosion spray or selecting a stainless steel coupling alternative.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill this fit my 3D printer's lead screw or ball screw?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes — this coupling is widely used to connect stepper motor shafts to lead screws (T8, T12, etc.) and ball screws on 3D printers, CNC routers, and laser engravers. Verify your motor shaft diameter and lead screw shaft diameter, then select the matching bore variant. The flexible spider insert compensates for minor misalignment between the motor and screw axes.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between the L Shaft Coupler and the Plum Blossom Mat variants?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe L Shaft Coupler variants include the complete coupling assembly: two aluminum jaw hubs plus one spider insert. The Plum Blossom Mat variants (35 mm and 55 mm Diameter) are replacement spider inserts only — intended for customers who already have the hubs and only need to replace the worn elastomer element.\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 Model and Size (Diameter × Bore) 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 outer diameter (OD) for my application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the OD to your shaft center distance and housing clearance. The 35 mm OD suits compact NEMA 17 stepper setups; 45 mm and 55 mm fit NEMA 23 and mid-frame servos; 65 mm is suited to larger NEMA 34 or industrial servo motors.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What bore size and keyway should I select?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Select the bore that matches your motor or lead screw shaft diameter. For plain round shafts, choose the matching bore without a keyway. For keyed shafts, match both the bore diameter and keyway width (4 mm, 5 mm, or 8 mm). If you need a non-standard bore, order the No Holes blank and machine it to your exact specification.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this coupling handle the torque of my stepper or servo motor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The aluminum jaw hubs are designed for light-to-medium duty torque transmission typical of CNC stepper motors (NEMA 17–34) and small servo motors. Contact us to confirm exact torque ratings for your specific configuration.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is the spider insert included, and can it be replaced separately?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — each order includes both aluminum hubs and one polyurethane plum blossom spider insert. The spider insert is a separate, replaceable component available as a standalone Plum Blossom Mat variant.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How corrosion-resistant are the aluminum hubs?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The hubs are machined from aluminum alloy which offers good natural corrosion resistance for indoor and light-duty environments. For wet or outdoor applications, apply a light anti-corrosion spray.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this fit my 3D printer's lead screw or ball screw?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes — this coupling is widely used to connect stepper motor shafts to lead screws (T8, T12, etc.) and ball screws on 3D printers, CNC routers, and laser engravers. Verify your motor shaft diameter and lead screw shaft diameter, then select the matching bore variant.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between the L Shaft Coupler and the Plum Blossom Mat variants?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The L Shaft Coupler variants include the complete coupling assembly: two aluminum jaw hubs plus one spider insert. The Plum Blossom Mat variants are replacement spider inserts only for customers who already have the hubs.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"L Shaft Coupler \/ 35mm x  8mm \/ 1 PCS","offer_id":52421906956562,"sku":"GYJLTHXCDZH2331x1","price":51.53,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 35mm x 10mm \/ 1 PCS","offer_id":52421906989330,"sku":"GYJLTHXCDZH2332x1","price":51.53,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 35mm x 12 Keyway 4mm \/ 1 PCS","offer_id":52421907022098,"sku":"GYJLTHXCDZH2333x1","price":51.53,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 35mm x 14 Keyway 5mm \/ 1 PCS","offer_id":52421907054866,"sku":"GYJLTHXCDZH2334x1","price":51.53,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 35mm x 15 Keyway 5mm \/ 1 PCS","offer_id":52421907087634,"sku":"GYJLTHXCDZH2335x1","price":51.53,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 35mm x 16 Keyway 5mm \/ 1 PCS","offer_id":52421907120402,"sku":"GYJLTHXCDZH2336x1","price":51.53,"currency_code":"USD","in_stock":true},{"title":"35mm Diameter Plum Blossom Mat \/ \/ \/ 1 PCS","offer_id":52421907153170,"sku":"GYJLTHXCDZH2337x1","price":7.21,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 55mm x 15 Keyway 5mm \/ 1 PCS","offer_id":52421907185938,"sku":"GYJLTHXCDZH2338x1","price":138.65,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 55mm x 16 Keyway 5mm \/ 1 PCS","offer_id":52421907218706,"sku":"GYJLTHXCDZH2339x1","price":138.65,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 55mm x 18 Keyway 6mm \/ 1 PCS","offer_id":52421907251474,"sku":"GYJLTHXCDZH2340x1","price":138.65,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 55mm x 19 Keyway 6mm \/ 1 PCS","offer_id":52421907284242,"sku":"GYJLTHXCDZH2341x1","price":138.65,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 55mm x 20 Keyway 6mm \/ 1 PCS","offer_id":52421907317010,"sku":"GYJLTHXCDZH2342x1","price":138.65,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 55mm x 22 Keyway 8mm \/ 1 PCS","offer_id":52421907349778,"sku":"GYJLTHXCDZH2343x1","price":138.65,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 55mm x 24 Keyway 8mm \/ 1 PCS","offer_id":52421907382546,"sku":"GYJLTHXCDZH2344x1","price":138.65,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 55mm x 25 Keyway 8mm \/ 1 PCS","offer_id":52421907415314,"sku":"GYJLTHXCDZH2345x1","price":138.65,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 55mm x 28 Keyway 8mm \/ 1 PCS","offer_id":52421907448082,"sku":"GYJLTHXCDZH2346x1","price":138.65,"currency_code":"USD","in_stock":true},{"title":"55mm Diameter Plum Blossom Mat \/ \/ \/ 1 PCS","offer_id":52421907480850,"sku":"GYJLTHXCDZH2347x1","price":7.96,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 35mm x  No Holes \/ 1 PCS","offer_id":52421907513618,"sku":"GYJLTHXCDZH2349x1","price":48.81,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 45mm x  No Holes \/ 1 PCS","offer_id":52421907546386,"sku":"GYJLTHXCDZH2350x1","price":85.53,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 55mm x  No Holes \/ 1 PCS","offer_id":52421907579154,"sku":"GYJLTHXCDZH2351x1","price":135.17,"currency_code":"USD","in_stock":true},{"title":"L Shaft Coupler \/ 65mm x  No Holes \/ 1 PCS","offer_id":52421907611922,"sku":"GYJLTHXCDZH2352x1","price":234.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-03_f04e16dc-3bff-4443-a213-3b8f4a4dbe82.jpg?v=1783348816","url":"https:\/\/homediyer.com\/products\/l-type-cnc-shaft-coupler-flexible-plum-spider-jaw-coupling-stepper-motor-3d","provider":"HomeDIYer","version":"1.0","type":"link"}