Nanotec Stepper Motors NEMA 6-42. 14-110 mm. Up to 13.5 Nm
NEMA34 86×86mm 5 A 1.2° 1.8°4.0N.m Hybrid Stepper Motor waterproof stepper motor-HOLRY
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NEMA 17 Stepper Motor - OpenBuilds Part Store
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Amazon.com: RTELLIGENT Nema 17 Stepper Motor 1PC/3PCS/5PCS, 2 Phase Step Motor Bipolar 1.5A 59.5oz.in(42Ncm) 42x42x38mm 4-Wire 30cm Long Cable for 3D Printer (1, 42A02C-Dupont) : Industrial & Scientific
Mini Stepper Motor - 200 Steps - 20x30mm NEMA-8 Size : ID 4411 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits