Posted 17 Mar 2011 21:55
1) the gap with a gap (including the minimum clearance zero) is called clearance fit. At this point, the hole tolerance zone in the shaft above the tolerance zone. As for holes and shafts in their actual size to allow changes in the tolerance band, so the hole is the gap axis with changes. When the hole is the maximum limit of the size of the minimum limit for the size of shaft, the assembly after the hole, with the axis of the loose state, known as the largest gap Xmax; the limit when the pore size of the axis of minimum limit for the maximum size, after assembly holes and shafts for the most compact with the state, called the minimum clearance Xmin. (2) interference with the interference fit (including the minimum interference zero) is called interference fit. At this point, the hole tolerance zone under the axis of the tolerance zone. In the interference fit, the hole size by the maximum limit of the axis from the difference between the minimum size limit for the minimum interference Ymin, a hole, shaft with the most loose state; hole axis minimum limit the maximum size limit of size reduction from the maximum difference between the interference Ymax, a hole, shaft with the most compact state. (3) the transition may have a gap or with the co-called interference with the transition. At this point, the hole tolerance zone overlap with the axis of the tolerance zone, the maximum limit of pore size reduction from the axis the difference between the minimum size limit for the maximum clearance Xmax, is a hole, shaft with the most loose state; pore size of the minimum limit the maximum limit of size reduction shaft was the largest difference from the interference Ymax, is the hole axis with the most compact state.