合金鑽进中,加快立軸轉速可以提高鑽进效率,已被大家所公認。我队五七年就将KA—2M—300型鑽机立軸轉数提高到200轉/分。一九五八年324共青团号鑽机在党解放思想,破除迷信的号召的鼓午下,应用了变速箱将立轴轉数增加到300轉/分。总的来看,加快轉速可以提高鑽进效率。但却有时出現反常現象:採用快速鑽进的班进尺反低于採用中速(250博 Alloy drilling, speed up the vertical axis can improve drilling efficiency, has been recognized by all. In the last five or seven years, our team increased the number of vertical shaft revolutions of the KA-2M-300 drilling rig to 200 rev / min. In 1958, under the drumming of the party’s call for emancipating the mind and eliminating superstition, the CYL drilling rig was applied with a gearbox to increase the number of vertical axis revolutions to 300 rev / min. In general, speeding up can increase drilling efficiency. But sometimes there is an anomaly: the working rate of fast drilling is lower than that of medium speed