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625 bearing idler for MK3

625 bearing idler for MK3

thingiverse

Here's a simple idler door that replaces the standard MK3 idler with second bondtech gear with a 625 bearing. I'm not sure 100% sure it helps, but it doesn't hurt and it eliminates that 'rust' between the gears. You'll need a 625 bearing and a 4mm round rod (I used a M4 bolt with the head cutoff).

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