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The Z-tower on my Rostock Max was making an annoying squeak noise. I tried adjusting the tension on cheap skate but that didn't help. The bearing was easily removed by unscrewing one screw. After removing the bearing holder, the bearing made a grinding noise when moved. I had a spare from inline skates and installed it. It worked fine after that.

I've been using the printer for about two years now and this was the first mechanical problem.

jesse wrote:The Z-tower on my Rostock Max was making an annoying squeak noise. I tried adjusting the tension on cheap skate but that didn't help. The bearing was easily removed by unscrewing one screw. After removing the bearing holder, the bearing made a grinding noise when moved. I had a spare from inline skates and installed it. It worked fine after that.

I've been using the printer for about two years now and this was the first mechanical problem.

Not bad after 2 years. 1 part in two years seems to indicate high reliablility.