Hi,
I’m currently building my first MPCNC build and I only lack the Nema 17 steppers. Sadly, stepperonline (amazon) doesn’t ship to where I live. I found some alternative Nema 17s, but I’m not sure if they would work. I’ll be doing (mainly) aluminum and wood milling. I’d be grateful if someone could tell me which stepper is better for the project.
Stepper 1: https://www.pololu.com/product/2267
Size: 42.3 mm square × 38 mm, not including the shaft (NEMA 17)
Weight: 285 g (10 oz)
Shaft diameter: 5 mm “D”
Steps per revolution: 200
Step Angle: 1.8°
Current rating: 1.68 A per coil
Voltage rating: 2.8 V
Resistance: 1.65 Ω per coil
Holding torque: 3.7 kg-cm (51 oz-in)
Inductance: 3.2 mH per coil
Lead length: 30 cm (12″)
Output shaft supported by two ball bearings
Stepper 2: http://www.ebay.com/itm/Nema-17-Stepper-Motor-1-5A-0-55N-m-55N-cm-47mm-For-Reprap-3D-Printer-CNC-/291198672147
Size: 42 x 42 x 47 mm
Current rating: 1.5A per coil
Voltage rating: 24V
Resistance: 1.6 Ω per coil
Holding torque: Max. 0.55 N.m
Inductance:2.8 MH per coil
Step Angle: 1.8°
200 steps/revolution
P.S.: I got the detailed specs for the second stepper from: http://www.robotistan.com/15-a-18-055nm-step-motor-nema-17-3d-printer-motor
(The site is in Turkish.)