Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work.

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Default 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.
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Default Custom seals to keep debris out of linear bearings?

On 06/04/2021 21:41, John Doe wrote:
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.


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.

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Default Custom seals to keep debris out of linear bearings?

On 04/06/2021 01:41 PM, John Doe wrote:
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.


8mm valve stem seals.

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

And springs wrap around them. See?
https://i.ebayimg.com/images/g/ZfIAA...N8m/s-l800.jpg
Nothings getting past these.

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Default Custom seals to keep debris out of linear bearings?

On Tuesday, April 6, 2021 at 1:41:59 PM UTC-7, John Doe wrote:

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


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.
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