Amazon.com: Usongshine Nema 17 Stepper Motor Bipolar Step Motor for Titan Extruder 3D Printer 4.1V 1A 13Ncm (18.4oz.in) 4 Lead 1.8 Deg with 1m Cable (17HS4023) : Electronics
SM42HT47-1684 nema 17 bipolar DC stepper motor, with Holding torque 5kg.cm 70oz.in, View DC stepper motor, SmartAutomation Product Details from Changzhou Smart Automation Motor Manufacturing Co., Ltd. on Alibaba.com
Amazon.com: STEPPERONLINE Stepper Motor Nema 17 Bipolar 40mm 64oz.in(45Ncm) 2A 4 Lead 3D Printer Hobby CNC : Industrial & Scientific