Fit tolerance refers to the sum of hole and shaft tolerances that make up the fit. It is the amount of change that allows clearance or interference. Fit tolerances are made up of the tolerance zone size and the tolerance zone position of holes and shafts. The fit tolerance of hole and shaft indicates the fit accuracy of hole and shaft.The size and position of hole and shaft fit tolerance zone indicate the fit accuracy and fit nature of hole and shaft. The size of fit tolerance = the size of tolerance zone; Fit tolerance zone size and position = fit nature.

Clearance fit: Fit with clearance (including minimum clearance equal to zero)

Interference fit: Fit with interference (including minimum interference equals zero)

Transition fit: there may be a clearance or interference fit. At this point, the tolerance zone of the hole overlaps with the tolerance zone of the shaft.

Matching: 0-5 clearance -0.001/-0.002 5-10 clearance 0/-0.001 10-30 clearance +0.001/0 30-50 clearance +0.002/0 50-10 clearance +0.003/0 100-150 clearance +0.004/0 150-200 clearance +0.005

Sliding fit: 0-5 clearance +0.002/+ 0.003/+0.002 10-30 clearance +0.004/+0.003 30-50 clearance +0.005/+0.004 50-100 clearance +0.006/+0.005 100-150 clearance +0.01/0.008 150-200 clearance +0.02/+0.012.

Q fit: 0-5 clearance +0.001/0 5-10 clearance +0.002/+0.001 10-30 clearance

+0.003/+0.002 30-50 clearance +0.004/0.003 50-100 clearance +0.005/+0.004. 100-200 clearance +0.013/+0.01

Matching feeling: The PIN head can be pressed into 1/3 of the workpiece by hand, and 1/2 of the tungsten steel

The PIN can be easily put into the hole by hand without shaking too much.

Q: The PIN can be gently pressed through the hole by hand, but some resistance can be felt.

The greater the mating resistance, the worse the roundness of the workpiece, the larger the size error.Thus affecting the relationship of coordination.

Special-shaped workpiece is mainly 1: the shape of the workpiece is more complex, machining many dimensional errors have a certain deviation, 2: the workpiece Angle R or C Angle size is difficult to control.

HG Precision Component is high accuracy precision parts, will fix your assembly by perfect tolerance manufacture.