{"product_id":"aluminum-cnc-shaft-coupler-flexible-plum-coupling-servo-motor-all-bore-sizes","title":"Aluminum CNC Shaft Coupler Flexible Plum Coupling Servo Motor All Bore Sizes","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eAluminum Flexible Plum Shaft Coupler — Precision Motion for Servo \u0026amp; Stepper Motor Builds\u003c\/h2\u003e\n    \u003cp\u003eWhen shaft misalignment causes vibration, noise, or premature bearing wear in your CNC router, 3D printer, or automation rig, the coupling is almost always the culprit. Engineers and DIY builders who demand tight motion control need a coupler that absorbs angular and parallel offset without sacrificing torque transmission. These aluminum plum (jaw) shaft couplers are machined to close tolerances, making them a reliable drop-in upgrade for servo motor, stepper motor, and lead-screw drive systems.\u003c\/p\u003e\n    \u003cp\u003eEach coupler is CNC-machined from aluminum alloy and features a spider\/plum elastomer insert seated between two aluminum hubs. Outer diameters span Ø14 mm (0.55 in) to Ø80 mm (3.15 in); body lengths range from 22 mm (0.87 in) to 114 mm (4.49 in); and bore diameters (d1\/d2) cover 3 mm up to 45 mm, accommodating a wide range of motor and lead-screw shaft combinations. Both shaft bores are clamped via set-screw, and the bore sizes for each variant are listed in the variant selector — specify d1 and d2 in the order remarks field.\u003c\/p\u003e\n    \u003cp\u003eTypical use cases include CNC router Z-axis lead-screw coupling, servo motor shaft coupling for pick-and-place automation, stepper motor flexible coupling for 3D printer drive systems, and general-purpose flexible shaft coupling for industrial conveyor or rotary table builds. Long-tail search terms: flexible jaw coupling all bore sizes, plum coupler servo motor CNC, aluminum spider coupling stepper motor.\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, NEMA 34 stepper motors and equivalent servo motors. Fits standard metric and imperial shaft diameters — select your outer diameter and length, then specify d1 \u0026amp; d2 shaft bores in the order remarks.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These Aluminum Flexible Plum 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\u003eCNC-Machined Aluminum Hubs\u003c\/strong\u003e — Precision-turned from aluminum alloy for dimensional accuracy and consistent clamping force across all bore sizes.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🌀\u003c\/span\u003e\n        \u003cstrong\u003ePlum \/ Spider Elastomer Insert\u003c\/strong\u003e — The polyurethane spider insert absorbs angular misalignment (typically up to 1°) and parallel offset, reducing vibration transmitted to bearings and encoders.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003eWide Size Range\u003c\/strong\u003e — Outer diameters from Ø14 mm to Ø80 mm and lengths from 22 mm to 114 mm cover light-duty 3D printer drives through heavy-duty servo motor applications in a single product line.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\n        \u003cstrong\u003eDual Set-Screw Clamping\u003c\/strong\u003e — Each hub is secured to its shaft with set screws, allowing tool-free bore adjustment and quick shaft swaps during prototyping or maintenance.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\n        \u003cstrong\u003eCustom Bore Pairing (d1 \/ d2)\u003c\/strong\u003e — Both input and output bore diameters are independently selectable within the range shown per variant, so you can couple mismatched motor and lead-screw shaft sizes without adapters.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🏭\u003c\/span\u003e\n        \u003cstrong\u003eBroad Application Compatibility\u003c\/strong\u003e — Suited for CNC routers, laser engravers, 3D printers, rotary tables, pick-and-place machines, and general industrial automation where flexible shaft coupling is required.\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 — Flexible Plum Shaft Coupler\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAluminum alloy (CNC-machined hubs) + polyurethane spider insert\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOuter Diameter (OD)\u003c\/th\u003e\n\u003ctd\u003eØ14 mm \/ Ø20 mm \/ Ø25 mm \/ Ø30 mm \/ Ø35 mm \/ Ø40 mm \/ Ø45 mm \/ Ø55 mm \/ Ø65 mm \/ Ø80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBody Length\u003c\/th\u003e\n\u003ctd\u003e22 mm – 114 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter (d1 \/ d2)\u003c\/th\u003e\n\u003ctd\u003e3 mm – 45 mm (range varies by OD; see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShaft Fixing Method\u003c\/th\u003e\n\u003ctd\u003eSet screw (hex socket)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCoupling Type\u003c\/th\u003e\n\u003ctd\u003eFlexible jaw \/ plum (spider) coupling\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish\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 pc (as listed per variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAngular Misalignment Tolerance\u003c\/th\u003e\n\u003ctd\u003eTypically up to 1° (varies by size and load)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eParallel Offset Tolerance\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 and length for my motor?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the outer diameter (OD) to the torque and shaft size of your motor. As a general rule, larger OD couplers handle higher torque. For length, choose a body length that provides enough clamping depth for both shafts — typically each shaft should insert at least 10–15 mm into its hub. Check your motor datasheet for shaft diameter, then select the variant whose bore range (d1\/d2) includes that value.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat do d1 and d2 mean, and how do I specify them?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003ed1 is the bore diameter of the motor-side hub and d2 is the bore diameter of the load-side hub (e.g., lead screw or output shaft). Each variant lists the allowable range (e.g., 4–10 mm). After selecting your variant, enter your required d1 and d2 values in the order remarks field at checkout. The coupler will be prepared to those bore sizes.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan this coupler handle misaligned shafts?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. The polyurethane spider insert between the two aluminum hubs accommodates angular misalignment (typically up to 1°) and small amounts of parallel offset. This makes it suitable for applications where perfect shaft alignment is difficult to achieve, such as DIY CNC builds or retrofitted motor mounts. For severe misalignment, consider realigning the shafts mechanically first.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this coupler corrosion-resistant for outdoor or humid environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe aluminum hubs offer natural oxidation resistance suitable for indoor workshop and light industrial environments. For prolonged exposure to moisture, salt spray, or chemicals, consider applying a protective coating or selecting a stainless-steel alternative. The polyurethane spider insert is resistant to oils and mild solvents.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill this fit NEMA 17 or NEMA 23 stepper motors?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNEMA 17 motors typically have a 5 mm shaft, and NEMA 23 motors commonly use 6.35 mm or 8 mm shafts. Select a variant whose d1\/d2 bore range includes your motor shaft diameter. For example, the Ø20 mm OD variant with a 4–10 mm bore range covers both NEMA 17 (5 mm) and NEMA 23 (6.35 mm \/ 8 mm) shafts.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the maximum RPM or torque rating?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eRated torque and maximum RPM vary by outer diameter and body length. Larger OD variants handle higher torque loads. For specific torque ratings for your chosen size, please contact us to confirm — we can provide technical data for the exact variant you select.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use this coupler for a lead screw on a CNC router or 3D printer?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes, this is one of the most common applications. Select a variant whose bore range covers both your motor shaft diameter and your lead screw diameter (typically 8 mm, 10 mm, or 12 mm for T8\/T10\/T12 lead screws). Specify d1 (motor shaft) and d2 (lead screw) in the order remarks. The flexible insert helps dampen vibration and reduce Z-banding artifacts in 3D printers.\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 outer diameter, length, and shaft bore range above, then add to cart. Specify your required d1 and d2 bore sizes in the order remarks.\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 and length for my motor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the outer diameter (OD) to the torque and shaft size of your motor. For length, choose a body length that provides enough clamping depth for both shafts — typically each shaft should insert at least 10–15 mm into its hub. Check your motor datasheet for shaft diameter, then select the variant whose bore range (d1\/d2) includes that value.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What do d1 and d2 mean, and how do I specify them?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"d1 is the bore diameter of the motor-side hub and d2 is the bore diameter of the load-side hub. Each variant lists the allowable range. After selecting your variant, enter your required d1 and d2 values in the order remarks field at checkout.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this coupler handle misaligned shafts?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The polyurethane spider insert accommodates angular misalignment (typically up to 1°) and small amounts of parallel offset, suitable for DIY CNC builds or retrofitted motor mounts.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this coupler corrosion-resistant for outdoor or humid environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The aluminum hubs offer natural oxidation resistance suitable for indoor workshop and light industrial environments. For prolonged exposure to moisture or chemicals, consider applying a protective coating. The polyurethane spider insert is resistant to oils and mild solvents.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will this fit NEMA 17 or NEMA 23 stepper motors?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"NEMA 17 motors typically have a 5 mm shaft; NEMA 23 commonly use 6.35 mm or 8 mm shafts. Select a variant whose d1\/d2 bore range includes your motor shaft diameter.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the maximum RPM or torque rating?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Rated torque and maximum RPM vary by outer diameter and body length. For specific torque ratings for your chosen size, please contact us to confirm.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use this coupler for a lead screw on a CNC router or 3D printer?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Select a variant whose bore range covers both your motor shaft diameter and your lead screw diameter. Specify d1 (motor shaft) and d2 (lead screw) in the order remarks. The flexible insert helps dampen vibration and reduce Z-banding artifacts in 3D printers.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"Ø 14mm \/ 22mm \/ 3~8mm Optional【Remarks d1 d2】【Remarks d1 d2】 \u0026 1pcs","offer_id":52421908988178,"sku":"LFL19217x1","price":27.69,"currency_code":"USD","in_stock":true},{"title":"Ø 20mm \/ 25mm \/ 4~10mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909020946,"sku":"LFL19218x1","price":38.03,"currency_code":"USD","in_stock":true},{"title":"Ø 20mm \/ 30mm \/ 4~10mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909053714,"sku":"LFL19219x1","price":38.03,"currency_code":"USD","in_stock":true},{"title":"Ø 25mm \/ 30mm \/ 4~12mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909086482,"sku":"LFL19220x1","price":39.98,"currency_code":"USD","in_stock":true},{"title":"Ø 25mm \/ 35mm \/ 4~12mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909119250,"sku":"LFL19221x1","price":42.38,"currency_code":"USD","in_stock":true},{"title":"Ø 30mm \/ 35mm \/ 5~16mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909152018,"sku":"LFL19222x1","price":45.1,"currency_code":"USD","in_stock":true},{"title":"Ø 30mm \/ 42mm \/ 5~16mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909184786,"sku":"LFL19223x1","price":47.82,"currency_code":"USD","in_stock":true},{"title":"Ø 35mm \/ 50mm \/ 8~19mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909217554,"sku":"LFL19224x1","price":63.59,"currency_code":"USD","in_stock":true},{"title":"Ø 40mm \/ 50mm \/ 6~22mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909250322,"sku":"LFL19225x1","price":72.3,"currency_code":"USD","in_stock":true},{"title":"Ø 40mm \/ 55mm \/ 6~22mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909283090,"sku":"LFL19226x1","price":75.56,"currency_code":"USD","in_stock":true},{"title":"Ø 40mm \/ 66mm \/ 6~22mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909315858,"sku":"LFL19227x1","price":78.83,"currency_code":"USD","in_stock":true},{"title":"Ø 40mm \/ 75mm \/ 14~22mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909348626,"sku":"LFL19228x1","price":97.32,"currency_code":"USD","in_stock":true},{"title":"Ø 45mm \/ 55mm \/ 8~25mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909381394,"sku":"LFL19229x1","price":106.57,"currency_code":"USD","in_stock":true},{"title":"Ø 45mm \/ 66mm \/ 8~25mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909414162,"sku":"LFL19230x1","price":112.01,"currency_code":"USD","in_stock":true},{"title":"Ø 45mm \/ 75mm \/ 14~25mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909446930,"sku":"LFL19231x1","price":126.7,"currency_code":"USD","in_stock":true},{"title":"Ø 45mm \/ 85mm \/ 14~25mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909479698,"sku":"LFL19232x1","price":143.02,"currency_code":"USD","in_stock":true},{"title":"Ø 55mm \/ 66mm \/ 12~30mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909512466,"sku":"LFL19233x1","price":147.37,"currency_code":"USD","in_stock":true},{"title":"Ø 55mm \/ 78mm \/ 12~30mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909545234,"sku":"LFL19234x1","price":158.79,"currency_code":"USD","in_stock":true},{"title":"Ø 55mm \/ 95mm \/ 14~28mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909578002,"sku":"LFL19235x1","price":190.13,"currency_code":"USD","in_stock":true},{"title":"Ø 55mm \/ 110mm \/ 14~28mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909610770,"sku":"LFL19236x1","price":202.1,"currency_code":"USD","in_stock":true},{"title":"Ø 65mm \/ 90mm \/ 14~38mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909643538,"sku":"LFL19237x1","price":253.45,"currency_code":"USD","in_stock":true},{"title":"Ø 80mm \/ 114 mm \/ 14~45mm Optional【Remarks d1 d2】 \u0026 1pcs","offer_id":52421909676306,"sku":"LFL19238x1","price":409.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-06_9337e27a-8897-4e6f-b95f-e016d612652c.jpg?v=1783350680","url":"https:\/\/homediyer.com\/products\/aluminum-cnc-shaft-coupler-flexible-plum-coupling-servo-motor-all-bore-sizes","provider":"HomeDIYer","version":"1.0","type":"link"}