Hi,
the true determinant on how fast a stepper can go before it loses enough torque that it starts missing steps is called the 'inductive time constant'.
It is the product of inductance and resistance. For example the motor that dazp1976 linked to has resistance of 0.8 and an inductance of 3.5mH.
Time constant =0.8 x 3.5
=2.8ms......not bad but not great.
And this one linked to by OP:
https://www.amazon.com/gp/product/B0...PTXF2T90&psc=1
has a resistance of 0.7 Ohm and 7.9mH
Time constant= 0.7 x 7.9
=5.53ms...….worse.
This stepper:
https://www.automationtechnologiesin...-single-shaft/
has a resistance of 0.27 and an inductance of 1.65mH
Time constant= 0.27 x 1.65
=0.445ms or 445us, way WAY better than the first two, but note it is only 465 oz.in
But check out this:
Object reference not set to an instance of an object.
has a resistance of 0.26 Ohm and an inductance of 1.18mH
Time constant=0.26 x 1.18mH
=0.306ms or 306us and so this 23 size stepper is the fastest of the lot. Note that its rated holding torque is 3.1Nm so is less torquey than the 34 size steppers but because it has
such a low inductance it will spin really fast and at speed it may have MORE torque than the bigger motors , simply because they have greater inductance.
Craig