Small Reduction Stepper Motor - 12VDC 32-Step 1/16 Gearing : ID 918 : $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: DC 5V 2-Phase 4-Wire Micro Stepper Motor Diameter 15mm 18 Degrees Full Metal Gearbox Precision Gear Motor Ratio 1:50 Mini Stepping Motor DIY for Robot Car Toy Model : Toys & Games
Motor Paso a paso (stepper) Wantai 42BYGHW811 NEMA 17 (ref: 0169) – electronperdido.com
Pololu - Stepper Motors
STEPPERONLINE Nema - Motor paso a paso bipolar 1 A 16 Ncm Stepper Motor 42 x 20 mm 4 cables para extrusora impresora 3D CNC Robot : Amazon.es: Industria, empresas y ciencia