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I have a random clicking sound and it seems to be under the print plate. I suspect it could be a bearing as I can’t find any obstructions around there. I have about 60 hours on the printer. I can’t seem to find a supplier to purchase them. Any suggestions as to what else it might be or where to purchase would be very much appreciated. Arn S.

The printer is a Monoprice Maker Select IIIP. Arn S.

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You would want to use a caliper and measure the bearings, but I bet they are an LM8UU bearing they are common see here: http://amzn.to/2gzt16H LM8UU bearings are 8mm inside diameter, 15mm Outside diameter, and 24mm long. Common for X and Y axis on many printers.

Some bearings are just noisy, so people upgrade to bushings Amazon.com they fit in place of the LM8UU bearings.

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Thanks for the info Jeff. It is 8mm and the LM8UU is probably the right replacement. I will replace the bearings if it gets any worse.

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Yeah no prob, Also I have over 1200 printing hours on my bushings. They hold up good i just use a little bit of gun oil here and there on the rails. Good ol Hoppes #9 or what ever is cheap http://amzn.to/2hJmouV it helps quiet down the bearings too. I have a CTC with the LM8UU bearings still and a little lube helps the clatter. I just dampen the rods, and my z axis screw with a little oil on an old tooth brush, just lightly not enough to drip.

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Just a follow-up report. I applied a little gun oil on the Y-axis rods (very lightly) and the clicking problem stopped after a short while. I now have about 72 hours on the printer and everything is running smoothly.