Wangdd22 1pcs T8 Anti backlash Spring Loaded Nut Elimination Gap Nut for 8mm Acme Threaded Rod Lead Screws
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Specifications for this item
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Special anti backlash nut, high precision, low cost DIY engraving machine, 3D printer preferred
Suitable for 3D printer T8 lead screw
Lead screw diameter: 8mm
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Top customer reviews
I do have an issue with these, but just on the design end. The holes are sized for M3 bolt clearance. I don't recommend using an M3 through it, you barely have any meat on the threads. M2.5 works just fine. Also, I did directly tap the hole for M4 and put a bolt through the top. This is a good way to do it too. I'm using the 2.5's because the flange of the nut locks down the top bearing on the Prusa.
I love how well these move on the leadscrew. I highly recommend the transition to these guys, especially to remove finish problems and backlash. It feels like a smooth ballscrew without the cost.
**Edit: One of the four I purchased was poorly machined, and does not fit together properly. Just a heads up you might get a crap one.