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我矿XKT2×3×1．5B－20型矿井提升机配用的6m天轮为整体自行车轮式。轮教轴孔与轴的配合为旧国标，表面粗糙度轴孔为Ra＝2．5μm，轴Ra＝6．3μm。1975年7月投产运行到1981年10月，1#天轮轴松动两次，2#天轮轴松动一次。检查发现轴孔既有椭圆又有锥度；轴和轴孔恰合面既有较大
Mine mine XKT2 × 3 × 1.5B-20 mine hoist equipped with 6m day wheel for the overall bicycle wheel. Axis axis with the axis of the old national standard, surface roughness axis hole Ra = 2.5μm, the axis Ra = 6.3μm. Put into operation in July 1975 to October 1981, 1 # day axle loose twice, 2 # day axle loose once. Inspection found that the shaft hole has both oval and taper; shaft and shaft hole just fit the surface both larger