Originally Posted by fietsbob

You would have to fully seal the space between the bearing cups with a rigid tube.. Used to be a Zirk Kit ,the sleeve between the cups
rigid plastic, then you drilled thru shell Zirk is a common grease fitting.

O rings slip snug on the spindle stay there because the crank arms are put on , next .. so use just the right number of Rings.


Not unusual to go really sparing on grease when making a run of several thousand things to cut grease expenditure overall .

A really cheap selling bike the motivation to use none is strong..