Yamawa's Solid Threading Die: D | YAMAWA MFG. Co., Ltd.

【英】困ったときの知恵袋詳細

Round Dies Metric Threads Trouble Shooting

I am threading a M12 × 1.5 bolt that has a special head shape and I need to cut the screw thread on a lathe. Even though the die cuts a thread, it seems the thread size is always incorrect and the nut will not fit the bolt. The thread was processed with an adjustable die and when I adjust the die the threads dimension is still too big. It seems the finished external threading process is not done correctly. Is there any way to solve this machined bolt problem?

I think that the die used for external threading is an adjustable die with an adjustment screw. The adjustment screw of the threading die has the function to make the thread size smaller but there is no function to forcibly decrease the die's thread diameter beyond the minimum adjustable diameter. Therefore, I think the die is distorting from the adjusting screw slot and causing the thread to be cut oversize. I think you can do a much better job of external threading with our new die Solid Die: D. It will not spread wider like an adjustable die.

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