5-18Ⅱ. The speedometer at the time when the pole switch is in low position.（For TPR-1230,TPR-1230H）The position for the pole switch.（For TPR-1230,TPR-1230H）Two speed change lever（low speed）Speed change levelsSpeed（rpm） 44 77 141∅25-∅40 ∅25-∅40 ∅19-∅25 ∅12-∅19Suitable drillingdiameter (mm) ∅38-∅55 ∅38-∅55 ∅28-∅38 ∅22-∅28Threading (metric) M16-M20 M16-M20 M6-M16Suitable automatic feeding step. 1 2 3 1 2 3 1 2 3Two speed change lever（high speed）Speed change levelsSpeed（rpm） 228 398 750∅12-∅19 ∅10-∅12 ∅6-∅10 ∅3-∅6Suitable drillingdiameter mm ∅22-∅28 ∅19-∅22 ∅10-∅19 ∅3-∅10threading(metric) M3-M6 Not suggested. Not suggested.Suitable automatic feeding step. 1 2 3 1 2 3 1 2 3

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