{"product_id":"ldo-motors-ldo-42sth40-1684ac-nema17-motor","title":"LDO Motors LDO-42STH40-1684AC Nema17 Motor","description":"\u003cp\u003eCoreXY and Voron builders understand that reliable stepper motors are essential to prevent layer shifting and maintain precise motion control — a weak or inconsistent motor can cause print defects and mechanical failures.\u003c\/p\u003e\u003cp\u003eThe LDO Motors LDO-42STH40-1684AC is a NEMA 17 stepper motor with a 1.8° step angle and 200 steps per revolution, delivering 4.5 Kgf·cm holding torque at 1.68A phase current. This motor is a standard choice for high-performance 3D printer builds like Voron 2.4, Trident, and Switchwire, where precise and smooth motion is critical. Its 40mm body and 24mm output shaft with a 5mm diameter and 16mm D-shaped design ensure compatibility with common couplers and pulleys used in CoreXY and Cartesian printers. LDO Motors are the official hardware supplier for Voron and Switchwire, making this motor a trusted upgrade or replacement part for these ecosystems.\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep Angle\u003c\/td\u003e\n\u003ctd\u003e1.8°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteps Per Revolution\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase Current\u003c\/td\u003e\n\u003ctd\u003e1.68A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHolding Torque\u003c\/td\u003e\n\u003ctd\u003e4.5 Kgf·cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Length\u003c\/td\u003e\n\u003ctd\u003e40mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Shaft Diameter\u003c\/td\u003e\n\u003ctd\u003e5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Shaft Length\u003c\/td\u003e\n\u003ctd\u003e24mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Shaft Shape\u003c\/td\u003e\n\u003ctd\u003e16mm D-Shaped\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Printers\u003c\/td\u003e\n\u003ctd\u003eVoron 2.4, Trident, Switchwire\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eWhy Upgrade?\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEnsures consistent layer alignment by providing stable torque for CoreXY and Cartesian motion systems.\u003c\/li\u003e\n\u003cli\u003eCompatible with Voron 2.4 and Switchwire builds that require precise stepper performance for high-speed printing.\u003c\/li\u003e\n\u003cli\u003eReduces missed steps and layer shifts common with lower quality or worn motors.\u003c\/li\u003e\n\u003cli\u003eSupports high current phase for improved motor responsiveness and quieter operation.\u003c\/li\u003e\n\u003cli\u003eIdeal for Klipper firmware users who demand smooth and accurate stepper control.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eBest For:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVoron 2.4 and Trident builders upgrading their X, Y, or Z axis motors.\u003c\/li\u003e\n\u003cli\u003eSwitchwire users replacing stock stepper motors for improved torque and reliability.\u003c\/li\u003e\n\u003cli\u003eCoreXY printer enthusiasts seeking consistent 1.8° step angle motors for precise motion.\u003c\/li\u003e\n\u003cli\u003eKlipper ecosystem users requiring motors compatible with high current drivers.\u003c\/li\u003e\n\u003cli\u003eDIY 3D printer builders needing a reliable NEMA 17 motor for custom CoreXY or Cartesian designs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003ePair With the Right Filament\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eReliable stepper motors like the LDO-42STH40-1684AC ensure precise extrusion and layer placement, which is critical when printing with demanding filaments.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/supplies3d.shop\/collections\/pla-filament\"\u003ePLA Filament\u003c\/a\u003e — ideal for general purpose prints requiring smooth motion and accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/supplies3d.shop\/collections\/petg-filament\"\u003ePETG Filament\u003c\/a\u003e — benefits from consistent extrusion enabled by stable motor torque.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/supplies3d.shop\/collections\/tpu-flexible-filament\"\u003eTPU Flexible Filament\u003c\/a\u003e — precise motor control helps prevent under-extrusion and stringing with flexible materials.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"West3D 3D Printing Supplies","offers":[{"title":"Default Title","offer_id":52735649644838,"sku":"LDO1339","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1004\/1986\/2822\/files\/ldo-motors-ldo-42sth40-1684ac-nema17-motor-west3d-printing-ldo-motors-636258.jpg?v=1773259425","url":"https:\/\/supplies3d.shop\/products\/ldo-motors-ldo-42sth40-1684ac-nema17-motor","provider":"SUPPLIES3D","version":"1.0","type":"link"}