Non-standard pitch thread machining with horizontal lathe

1.Proposal of the problem In one production, the problem of machining a screw matched with a φ45mm×18.5mm special-purpose nut was encountered, because there is no P=18.5mm pitch in the standard pitch table (Table 1), that is to say It cannot be processed normally with a horizontal lathe. If you make a special hanging wheel, it will take a long time and increase the processing cost, which is not worth the candle. How to machine non-standard pitch with horizontal machine?

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