Another IMS bearing thread

[Walter White]

NSK 6204DU after 40 minutes in oil bath, filled with oil.
The box it came in says DDU, but the seal only says DU.



The Nachi seal appears superior to the NSK seal when viewed under a magnifying glass.

[Walter White]

I am considering the possibility of bonding a supplemental seal to a bearings original seal.


One possibility would be to bond a trimmed-down commercially available seal to the existing seal.


Another possibility would be to bond a piece of sheet rubber to the existing seal, and machine a step on the flange which could be done on any good lathe in a few minutes.

Supplemental seals might be able to bond to original rubber seals using the same bonding agents that are used to glue O-rings together. Rubber original seals could be bonded to the outer race using a good rubber-metal bonding agent like E6000.
I have some rubber-to-rubber samples soaking in oil before I try to tear them apart. Bonding a supplemental seal to a metal original seal (Z or ZZ) would probably be the best, but a rubber-to-rubber seal would probably be the best bond.

[Nine8Six]

Originally Posted by Walter White

I am considering the possibility of bonding a supplemental seal to a bearings original seal.

Smart a**!

I give you this, you are brilliant. Sounds like a bullet proof idea