Custom seals to keep debris out of linear bearings?

Plastic filament won't work for bearings here, because the bearings must move freely on rods even when twisting pressure is applied.

My main problem is a dire need to make 8 mm bearing seals that actually fit the 8 mm rod. The silly rubber seals that come with cheap bearings have a gap wide enough to allow tiny particles into the bearing.

Any ways to make close-fitting but easy sliding bearing shields out of whatever material?

Thanks.

Reply to
John Doe
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Design something and print it with TPU filament with an ID a bit smaller than 8mm, that's assuming your 3D printer can handle flexible filament.

Reply to
David Billington

8mm valve stem seals.

Viton® fluoroelastomer, Teflon... no silly rubber.

And springs wrap around them. See?

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getting past these.

Reply to
Cörvid

For sliding on a rod, a good seal is a bellows around the rod... which also keeps dust off the sliding surface.

Another traditional method is to use felt (oiled, perhaps) or leather against the sliding surface.

Reply to
whit3rd

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