Originally Posted by
Walky
I've been playing with some blocks the last few days, and I have some extra observations (they are FK, but internally it's practically the same as BK, so it should apply to both kind of blocks):
First of all, it's true that pressing the seals can prevent the nut rubbing so hard on the rubber, BUT the other side can start rubbing against the bearing cage (the plastic thing holding the balls in place between the ID and OD of the AC bearing), and it can be just as bad as before (or worse).
What to do, then? I removed the seal and sanded the backside of it, to prevent it from rubbing the cage. It worked!, I hope this tip can be useful to someone, just be sure to clean the seal before putting it back in, so no debris can get into the bearings.
I also noticed that both the fixed and floating blocks have a smaller ID at one side (which means it's harder to press the AC bearings in place the deeper they are. This is easy to notice on the floating end, where I can take the bearing out by hand through one side, but impossible to do it through the opposite side of the block (may vary between blocks). I guess that's because of lack of rigidity on the manufacturing machine (or maybe their bit is partially dull?)