・If axle(Shaft) is loose and easy to come off,please try this.
軸がゆるい場合の対応

The shaft is not made tight fit so that it is easy to use both sides.If you don't want it to come off easily, you can use glue, but I recommend another method.

If you make a very small scratch with pliers on the axle, it will be easier to get it stuck.Be careful not to overdo it too hard as the bearing will not fit.

・軸が硬すぎる場合/If too tight and can not push in,please try this.

We have learned from a customer that some of the axles are tightly fitted. At the factory, we have to check the fit by hand one by one before shipping. Some products have changed shape of edges, cannot be fitted in a straight line, or are hard from the start due to tolerance. After a few attempts, the aluminum shaft will deform and become just the right degree of hardness. Also, since the bearing is only press-fit, it may come off if you push it in with the flat side up. You push the bearing with the curved side up, it may not come off.

Also, although the large defectives in the plating was removed after two inspections, there may be some very small bubbles or lines in the product. Please be aware that as a machined metal product, it will not have the same shine as a precious jewelry.

Please do not hesitate to let us know if you have any questions about the item you received. We hope you will enjoy YenSpin.

• 回し方/How to spin

You can't spin Yen Spin in the normal way because the axle rotates idly. For example, there are two ways to spin.

Roll and spin your hand or a friction surface. It's very easy for small hand kids.

Pro level challenge:If you play yo-yo or spintop and are confident in your finger snap, this way is for you. You can spin it very hard.

You can surely use any kind of electric car toys. Even children can spin it easily.Adults can also use a hand drill to accelerate the Yen Spin, but not too much, as it may cause damage or injury.