Editing Pivot System (section)

=====Uneven Bushing=====

This is the most common cause for binding. A small amount of unevenness is usually acceptable, but the tighter your tune, the less tolerance there is before your balisong starts to bind. For example a difference of 0.030mm might not cause issues on a loose tune, but even a difference of 0.010mm can cause binding on a tight tune.

Stainless steel washers are especially problematic with uneven bushings because the hard washer will get forced into the blade, causing the edge of the washer to grind into the blade. This issue is far less severe with phosphor bronze washers, as the softer material will "glide" against the blade even if the bushing is not perfectly flat. 

Unfortunately currently there is no way to prevent uneven bushings, however you can minimize the chance of making your bushing uneven by buying slightly oversized bushings. This way, you will spend as little time as possible on the lapping surface, reducing the chances of introducing uneveness. However, this method comes with its own set of problems as this method is very unreliable and some bushing sellers, like [[TheTrueLink]] have been known to send out bushings that are shorter than advertised.