How crucial are the specks on the stepper motors to the ones on the shop
like phase resistance, inductance will these effects the final build in operation will setting need altering
i see there is a 2nd stepper on the shop now ? is this a better choice more accurate ?
84oz steppers from Zyltech and Stepper Online seem popular and reliable. Not sure why URL says ‘76oz’, probably an artifact of older slightly less powerful steppers being sold in the past.
Use this for LR4…
For LowRider 4 you can’t easily fit larger more powerful Nema 17 steppers, except for the X axis.
LowRider builders should ignore the 0.9 degree steppers. Those were intended as an experiment/option for V1E 3D Printer machines. I think Ryan originally tried out that $$$ stepper to see if/how that help improve with print quality. Vaguely recall he concluded it wasn’t worth the price for his requirements. Guessing he’s selling so people can use them for whatever they’re making, but not for LowRiders. Maybe product description edit would help so no ones buys for their LowRider builds…
Avoid this…
https://www.v1e.com/products/0-9-nema17-73oz-in
That said… I didn’t check datasheets and verify torque speed curves. My gut is that 1.8 will have better torque for the current+speeds our LR4 operate at 
Its the shipping that kills buying a couple of items from the shop , for $50 worth of steppers the freight is $79 add taxes so converted to nz dollars that’s $262.21
i did buy everything for my 1st build from the shop and shipping was about same for everything I just can’t justify the shipping cost for a few steppers it makes them $52 each
Yeah, shipping/taxes/tariff in unpredictable high energy cost times are 
What makes sense for your situation, buying from https://www.omc-stepperonline.com directly, or is there better options for Makers in Australasia countries?
yes steepers online will only ship some items hence my question on specs, as so many variances per steeper , dont want get wrong ones , have been searching for a week and cant get match to the one on the shop
Guessing this one based on electrical/power and body dimension specs…
https://www.omc-stepperonline.com/nema-17-bipolar-59ncm-84oz-in-2a-42x48mm-4-wires-w-1m-cable-connector-17hs19-2004s1
But, should check shaft length, D-cut length are ok? @vicious1
#mg_locator
I bought a set of five Nema 17 clones off eBay for about £35 for the set (I apologise for not knowing what that is in NZ$). Looked for the highest torque units that fit in the available length. They came with different wiring configurations across what should be five identical steppers (!) which really confused me until I worked out what was wrong, but they seem to work well enough. If they’re lacking in torque, I guess I’ll just take smaller cuts.
I really only order Stepperonline steppers and drivers, they are really great. 
To answer the actual question: Somewhat.
Yes, absolutely, IF they are wildly out of spec.
You’ve heard about wiring of the phases and inconsistency from other suppliers. That’s true.
Your question, though, was about the specs.
If you found a motor that had a wildly different coil resistance then you will need to tune your settings away from the stock ones.
At some point it becomes nearly irrecoverable.
The steppers in the shop are rated for 1.7A/phase and we typically run them in the 900mA to 1A range and not much over. If your steppers have higher nominal current (lower coil resistance), then at some point the impacts of that through the system will mean that the controller capabilities limit you.
For the data sheet that you posted, 2A rating and 1.6 Ohms of coil resistance with a .59 N*m holding torque looks to be just fine to use.
You should pay attention to a possible need to raise the current drive a bit and also the holding current in your config.yaml.
You should also carefully measure the temps of your steppers to be sure you don’t get the system too warm.
