Stepper Motor - NEMA-23 Size with 9mm GT2 Pulley [140 oz/in 2.8A] : ID 5117 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: Usongshine Nema 17 Stepper Motor Bipolar 38mm Body 42N.cm (60oz.in) 1.5A 4-Lead with 1m Cable and Connector for 3D Printer/Extruder/DIY CNC(17HS4401) : Industrial & Scientific
Rtelligent Nema 24 Stepper Motor Nema 23 Installation Size 4N.M 40kg.cm 60x102mm 4 Lead 4.2A Shaft Length 21mm Shaft Dia 8mm|Stepper Motor| - AliExpress
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SureStep stepper motor, NEMA size 34 frame, IP40, single shaft, 6.3A, 434 oz-in holding torque, 1.8-degree step angle, 200 steps per revolution, bipolar. (1) 12in cable with 4-lead connector included.