8mm Metric Acme Lead Screw.
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These trapezoidal (metric) lead screws pitch and diameter are a perfect combination of high torque and speed. This screw fits the bill for most machine designs and has become a standard on OpenBuilds.
Equipped a high pitch which provides a quick 8mm translation for every single revolution on the screw.
40mm is added to the length by standard. This is to allow the ACME rod to fit a standard length rail and have some extra mm sticking out and reach a pulley, coupler or other drive components.
It's a great power transmition choice for your build!
Please note: Long screws can wobble - but properly mounted with bearings at both ends and one or preferably two ACME nuts on the gantry plates this should not be any problem.
An example steps settings for your control software would be 200 steps per millimeter if you are running the common 1.8 degree steppers and your stepper driver is set to 1/8 step mode.
Common setup example
NOTE: Because this lead has 4 starts with 2mm pitch between each this means the pitch will be 8. So 8 is what you would use for the pitch setting in the steps calculators..
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