{"product_id":"double-diaphragm-disc-shaft-coupling-d56l63-11-20mm-bore-stepper-motor-ball-screw","title":"Double Diaphragm Disc Shaft Coupling D56L63 | 11–20mm Bore","description":"\u003ch2\u003eDouble Diaphragm Disc Shaft Coupling – D56 L63 | 11–20mm Inner Diameter\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eKANDE BEARINGS Double Diaphragm Disc Coupling (Model D56L63)\u003c\/strong\u003e is a precision-engineered flexible shaft coupling designed for stepper motors, ball screws, and high-accuracy power transmission applications. Machined from lightweight yet durable \u003cstrong\u003ealuminium\u003c\/strong\u003e with stainless steel diaphragm elements, this coupling delivers exceptional torsional rigidity and transmission efficiency for CNC machines, robotics, and precision drives.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConcise, Rigid Structure:\u003c\/strong\u003e Simple design with tight connection points for easy assembly and disassembly in the field.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Torsional Rigidity:\u003c\/strong\u003e Enables precise rotational control of shafts, ideal for high-accuracy CNC and motion-control systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccurate Transmission:\u003c\/strong\u003e Delivers consistent, reliable speed transmission for precision machinery with minimal backlash.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStainless Steel Diaphragm:\u003c\/strong\u003e Tolerates eccentricity, angular deflection, and axial shaft deviation with excellent fatigue resistance over long service life.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Efficiency:\u003c\/strong\u003e Achieves up to \u003cstrong\u003e99.86% transmission efficiency\u003c\/strong\u003e, ideal for medium and high power drive applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Temperature Range:\u003c\/strong\u003e Operates reliably from \u003cstrong\u003e–80°C to +300°C\u003c\/strong\u003e, performing safely in demanding industrial environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003cth style=\"padding:8px;border:1px solid #ddd;text-align:left;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding:8px;border:1px solid #ddd;text-align:left;\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eKANDE BEARINGS\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eModel Number\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eD56L63\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eOuter Diameter (D)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eLength (L)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e63 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eInner Diameter (Bore)\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e11–20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eAluminium body \/ Stainless Steel diaphragm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eFlexible – Double Diaphragm Disc\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eTransmission Efficiency\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eUp to 99.86%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e–80°C to +300°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eOrigin\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eThis coupling is well-suited for a wide range of precision mechanical and industrial uses, including:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCNC machine tools and machining centers\u003c\/li\u003e\n  \u003cli\u003eStepper motor and servo motor drive systems\u003c\/li\u003e\n  \u003cli\u003eBall screw and lead screw assemblies\u003c\/li\u003e\n  \u003cli\u003eRobotics and automation equipment\u003c\/li\u003e\n  \u003cli\u003eMedium and high power drive shafts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cp\u003eAlso check out these useful tools and hardware items from our store:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-20mm-diamond-flat-grinding-wheel-dry-and-wet-use-heavy-duty-concrete-grinder-wheel-blue-vacuum-brazed\"\u003e10\/20mm Diamond Flat Grinding Wheel – Dry and Wet Use Heavy Duty\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10pcs-durable-gold-blade-nut-metal-universal-trimmer-accessories-anti-loosening-line-left-hand-thread-replacement-parts-1\"\u003e10pcs Durable Gold Blade Nut Metal Universal Trimmer Accessories\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/stainless-steel-self-tapping-screws-m2-2-m4-8-phillips-wood-hinge\"\u003e10PCS Stainless Steel Self-Tapping Screws M2.2–M4.8 Phillips\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What bore sizes are compatible with the D56L63 double diaphragm disc coupling?\u003c\/h4\u003e\n\u003cp\u003eA: The D56L63 double diaphragm shaft coupling accommodates inner diameters (bore sizes) ranging from \u003cstrong\u003e11 mm to 20 mm\u003c\/strong\u003e, making it versatile for a variety of stepper motor shafts and ball screw spindles in that range.\u003c\/p\u003e\n\u003ch4\u003eQ: What makes a double diaphragm disc coupling different from a standard flexible coupling?\u003c\/h4\u003e\n\u003cp\u003eA: A double diaphragm disc coupling uses two stainless steel diaphragm elements to simultaneously handle eccentricity, angular misalignment, and axial deviation while maintaining very high torsional rigidity. This results in more precise motion transfer compared to jaw-type or bellows couplings, especially in high-accuracy CNC and motion-control systems.\u003c\/p\u003e\n\u003ch4\u003eQ: Can this coupling handle high-temperature industrial environments?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The D56L63 disc coupling is rated for an operating temperature range of \u003cstrong\u003e–80°C to +300°C\u003c\/strong\u003e, allowing it to function reliably in demanding industrial and high-temperature drive applications without loss of performance.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this coupling suitable for precision ball screw assemblies?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The high torsional rigidity and up to 99.86% transmission efficiency of this double diaphragm disc coupling make it an excellent choice for ball screw and lead screw assemblies where accurate, low-backlash torque transmission is essential.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What bore sizes are compatible with the D56L63 double diaphragm disc coupling?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The D56L63 double diaphragm shaft coupling accommodates inner diameters (bore sizes) ranging from 11 mm to 20 mm, making it versatile for a variety of stepper motor shafts and ball screw spindles in that range.\"}}, {\"@type\": \"Question\", \"name\": \"What makes a double diaphragm disc coupling different from a standard flexible coupling?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A double diaphragm disc coupling uses two stainless steel diaphragm elements to simultaneously handle eccentricity, angular misalignment, and axial deviation while maintaining very high torsional rigidity. 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