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I'll be using 6 of these motors, so if they are connected to 24V one motor draws 0.16A, then 5x0.16=0.8A with a deviation of a few Amperes.
Remember building this is at your own risk so this is only a rough guide. Remember the specification is showing running current, not starting current or current under load, so its going to be more that the specification says in operation! So you need to look at the starting and current under load then multiply this by the number of motors.
NB these are just motors not motor/gearbox drives so you are putting the chuck straight on the motor shaft (min speed 3500 RPM).
I hope you know this means there may not be enough torque, but I assume you have other input from someone that's used them.
Also min-max speed stated you will be running the drills at minimum speed of 3500 RPM but higher on 24V. The power supply doesn't know what the max voltage of the motors are so if you turn up the voltage past the spec the motors will go faster and eventually burn out. So you are in control and you are setting the voltage, the motors will draw whatever current they need to get to speed. If they stall or jam then the current limit will not save the motors it should protect the power supply. The reason is the power supply is supplying total current, each motor draws only a small % of the total so burn out current for one motor will still be within the power supply max current spec.
The DC voltage is quoted as 12-36v and the speed 3500-9000 RPM so it looks like and its only a guess. The speed at 12V is 3500RPM and will increase up to a Max of 9000 RPM at 36V.
The Current of a supply is the maximum current you can draw off it without burning out the power supply.
Ie if a power supply is quoted at 10A then the "Load" (your motors) will draw whatever current they need to operate if they draw 2 amps then that's OK if they draw 12A then the power supply will burn out. So as long as the power supply can put out more current than you need its OK but less than you need it will burn out.
The 24V model of the power supply you link to is max rated at 4.5A so as long as you don't exceed this it should work.
But if the total starting current exceeds the power supply current then the SMPS will shut down in current limit.
So your buying the model with a set voltage and set current so if its a 24V then it has 4.5A.
Voltage is slightly adjustable in the spec to Quote 21.6 ~ 26.4V probably to allow for variation from 24V.
If you put more voltage across the motors than they are designed for the motors will burn outHope this has been some help.
You need someone who has one of these working so you can check the motor type they have used.
Without that its difficult to say what the outcome will be under load.
I'll let someone else have an input so you can get other ideas.
Regards
M. Gregg