Linear Actuator Linear Motion Aluminum High Exactness Manual Linear Slide Table Ball Screw Motion Rail CNC Linear Stage Slide Stroke 100mm/3.9inch

works per spec, will buy again

For the price, I was expecting a lot less than what I received. This unit is beefy and I am not finding much play in any direction. Well done, great price.Oh, and BTW, the 1 revolution distance is 4mm.

Better quality than I expected. I wish the wiring was enclosed in a sheath, but I did that myself. I would buy this again. If they sold this with a driver, it would save time shopping and spec-ing a driver for it, but I found one eventually. There are no spec labels on the stepper motor and no documentation with the order, so you may want to keep a copy of the original amazon listing. The captured nuts are all metric as you might expect. they can be swapped out by taking off the end caps.Update: After a couple months of light use, the slide blew out the entrapped balls because of a missing allen screw where the balls are inserted into the spiral bearing. As the plastic end seal pieces on the spiral drive loosened over time because they are not attached firmly, the balls escaped the entrapment. I rebuilt what I could with the balls that I could find, and now I need to order a metric allen screw to properly fix this. I now realize that the slide has weak seals and even with a screw plug, it will likely fail again.

Besides the platform being dislocated from the rail during shipping. Product works great!I really need the 3D CAD files for this rail though because the project I am working on needs to have precise measurements.Please let me know if you can provide these files!

Not detailed in product description: this has rollers working on captive (in the aluminum extrusion) ground steel bar and adjustable tension. Rock solid on initial inspection. Lead screw and nut are very beefy and apparently backlash free. Bonus item is the Nema motor bracket will take a Nema 23 stepper! I expected to have to make an adapter for my X axis lathe slide, very pleasantly surprised! Will for sure buy again, looking to see if they do longer stroke variant for the Z axis.