In view of the different offsets and the bearing clearances of offset mono-cone bit,with the key analysis of the contact stress at the journal bottom of large journal ...

• 轴颈底部的接触应力随偏心距增大而增大,且在正常公差范围内的间隙变化对接触应力的影响不明显;止推面上端的接触应力比下端大,制造时应加强止推面上端的强度和硬度。