ALUNAR 3D Printer Endstops/Limit Switch/Mechanical Switch for Reprap I3 DIY Kit M508 ANET A6 A8 5Pcs

These are extremely high quality machined products . They were delivered ahead of schedule besides . I will do business with these people as much as I can . By adding a thicker break nut it is very easy to assemble and dissemble for cleaning or changing tips. I have tried many different manufactures and received barely usable parts but these are fantastic . Great workmanship and quality control. Keep up the good work !!!!

Turns smoothly, even under load. 6mm GT2 belt fits nicely between two bearings, with the flange on the outer edge of course. The bore is 3mm and an M3 screw fits perfectly inside. OD of the flange is 11.5mm. OD of the pulley (excl. flange) is 10mm. Adjust design or usage accordingly.

They don't fit the Zortrax M200 printer due to a narrow stem (both interior and exterior). But they look as if they're high quality, and they arrived quickly.

These bearings worked great, exactly as described, dimensions are accurate. They roll very smoothly. I used these for x and y belt tensioners on my Prusa I3 clone. I have had these installed in my printer for about 3 months now, I'm pretty happy with the price and performance.

I received and nozzle that is bigger and doesn't even fit my printer... Now I am out $8 for nothing...

It fitted perfectly.....

Wanted to swap out my old nozzle and ran across these and figured I'd give them a try. I'm glad I did. The machining looks awesome, the fit perfect, and well the print looks great too! Will be back for more of these.

perfect for the 3d colido 3d printer