DC motor stall current

[init]

Hey guys, possibly rookie question here. I have a motor: https://www.motiondynamics.com.au/worm-drive-motor-12v-50w-45-65-rpm-5-29nm-torque.html
and have measured the resistance to be around 5 Ohms. The recommended operating voltage is 12V, so that would imply the maximum or stall current would simply be 12/5 = 2.4 A ish but the website says the stall current is 30A. How is this possible? Are they over driving the voltage?

[init]

Datasheets only give you worst case current, which is across individual products, time and test conditions. They say 30A, then you can be sure that a 30A PSU won't blow up in any case, unless the motor sees reverse torque, which generates negative EMF.
To address your question, if you measured 5R, then without reverse torque, you will not get more than 2.4A at 12V. If stall resistance is 5R, then you should return the motor as it is a fake.

If this is worst case, does this imply I can drive the motor at this worse case for long periods? If not, how long is acceptable? I measured the resistance between the input terminals while the motor was off with a basic $40 multi meter, I'm guessing I may need something that gives a more accurate reading, or was I attempting to measure resistance incorrectly?

[init]

No. You can drive it till it overheats. A motor is designed to convert electrical power into mechanical power, not heat power, while in the mean time takes heat away by generating stray air flow. Now it does neither if stalled.
For resistance measurement, you do not need a good meter at all. Even the shittiest digital meter will not give you more than 10% error at DCV or resistance. The product page says 2 power modes, so make sure you are measuring the correct winding. If it has a common winding, then if you measure resistance between two other terminals, then you may see considerably higher resistance. Make sure to measure resistance between either winding and common terminal.

From every permutation of resistance measurement, the ones which were less than 200 Ohm were 0.3, 4.6, 24.5 Ohm. It doesnt help that the wire colors dont match up with what the schematic diagram says, so I'm not sure what I am measuring across.

[init]

If wire colors don't match, then it could be a 24V version or something similar, but not exact same model. Contact seller.

Sorry I mean the same wire colors are there but they are in different locations in the housing. Thanks for the help BTW.