The toy showed the expected movement and succeeded. It is convenient that only screws with a diameter of 2 mm and a length of 10 mm are inserted and fixed. Also, I want something with some spring characteristics. It is promising as a material of monozukuri teaching materials this time.
It is used for repairing Ryobi's disc grinder nearly 30 years ago. The spring of the carbon brush is burned out due to overload and the brush assembly for repair is also abolished, cut this spring close to the wire diameter and the number of turns, wind it around the brush wire and replace only the spring, burn it The brush surface was repaired a little with a hook to complete repair. When the brush is completely gone this time, it may be a lifetime to drift, but I think that it will be able to work hard with active for a while now.
Springs of plastic nippers break or lose as they break apart. Because the dedicated spring was expensive, I purchased this product. But it seemed that the strength was insufficient. I wish there were variations in strength even with the same diameter.
There was something similar to the home center in the neighborhood, but the finish of the surface was beautiful here. I am sorry that the length is determined by the standard or there is no spring with a free length of 70 mm or more.