LM08UU linear bearing

thingiverse

<h1 align="center">LM08UU linear bearing (linear and tapered)</h1> This is my proposal for linear bearings of the LM08UU type. There are two types, a linear one and a tapered one. Both are drill types that require an 8mm drill to adjust the inner diameter. Drill Type Printed linear bearings normally do not achieve the necessary precision. Even if they fit perfectly by accident, there is typically not full contact on the entire inner surface but only in some smaller regions. This may work well at first, but there is often a rapid increase of tolerances due to abrasion of these small areas. If you want to overcome this problem by designing a more flexible structure, the printer bed may tend to oscillate and thus be less precise again. For this reason, I decided to go for drilled bearings, which from my point of view are the best choice to achieve precision and endurance. Drilled bearings mean that you should enlarge the inner hole with an 8mm drill carefully until it fits on your rail. Tapered Bearings should typically be mounted with some force; otherwise, they may move within the mounting block generating unwanted noise. Unfortunately, non-metal bearings are often very sensitive to pressure (the original IGUS as well). If you apply some force from outside, it usually creates more friction on the inner side towards the rail. For this reason, I designed a tapered type bearing: * One part of the bearing has a smaller outer radius, and the other part has a larger inner radius. * Fixing of the bearing will be done at the larger outer radius part. If some compression occurs, it will be compensated by the larger inner radius. * If you have two bearings on one rail, the length of the bearing no longer matters. The distance between the two bearings defines the effective length. For this tapered type, a bearing block will follow soon. History Version 0.3.0 First published version and currently in use.