The hand spinner that the customer's child (+ Child) had had used bearings that were so severe so I exchanged it for service. It is completely out of work, but I was very pleased, and I got a job of maintenance so let's do so (laugh)
Quality is no problem, and above all else, delivery is earlier than squeezing parts supplier (out of stock) and I am saved.
For teaching materials of junior high school social studies etc
On 2017-10-17 19:35:52
Exchange one of the same two hand spinners for this NTN bearing. I compared the students with the original (perhaps the product of China etc). Compared to the original product which has a rough sense of rotation, it is manufactured by NTN which rotates more smoothly than "it does not become comparable". I was able to realize the difference in technology between Japan and other countries. However, as for the hand spinner, which one is the right answer, there are many students that "I do not feel like turning" to be very smooth, and one student raised a voice like "Prius".
Use degreased. Originally it was around 3 minutes, but in a few days it got strange sounds and strange sounds came around for only about one minute. However, it is good quality as it goes without being damaged.
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