The pinion shaft of Baoji F pump is forged with alloy steel, and the herringbone gear is machined on the shaft. The medium hard tooth surface is adopted. For easy maintenance, the single row long cylindrical roller bearing without inner ring flange is selected.

In general, the number of teeth of big gear rings should be used as a reference when replacing pinion shafts. It is suggested that users choose the matching parts produced by Baoji Petroleum Machinery.