Tolerance costs money. In order to have the bearing post the right size where its tight enough to be smooth but loose enough to be able to remove the bearing without damage is .0002". This is insane, even for aerospace, but at One Drop we do it. No one else attempts because of cost reduction - it’s too expensive to do this because when you miss, the parts are bad so production loss is much higher.
So the solution is a bigger tolerance range that biases the tight side. This is why many non-One Drops have the squeak or need a bearing removal tool. This is intentional. This solution is understandable because holding .0002" on an anodized part verges on impossible because anodizing tolerance itself is .0006". This is one the reasons why our competitors yoyos cost less. I guess we are a little bit crazy.