Prusa Mk3 bronze bush holder for Y axis
thingiverse
The AM0814-20 Oil Filled Bronze Plain Bush 8x14x20mm is an affordable option at £12 for a pack of five. This bushing fits snugly into the printer's holder, providing a perfect interference fit. However, keep in mind that your printer's tolerance may differ. Two mounting holes are available, one with a slot. First, screw both mounts loosely and move the bed to allow the bearings to pivot and align. Then, secure both screws using nylock nuts while leaving a tiny amount of slack for smooth movement. You might notice some resistance compared to LM8U ball-type bearings, but this is not a cause for concern. Avoid over-tightening, as a small amount of play can aid alignment. To maintain the bushing's performance, apply a small amount of silicone grease every month or so. This will prevent visible wear and significantly reduce noise levels.
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