What are the coordinates of the shaft and the bearing, and the shaft and the pulley
(3) the fit precision grade are generally selected level 6, sometimes also want to see the material, and the processing technology, theoretical level 7 is a bit too low precision, level 5 co-operating with grinding; (4) the general selection is: The inner circle of the bearing and the shaft of the shaft. ... . Outside... Hole... , Kong Xuan K6 or K7
Axis and bearing: (1) the bearing coordination is usually the transition, but it is optional in special case, but very few. search (2) because with bearing and the shaft is match to the inner ring and the shaft bearing, using the basic hole system, original bearing should be completely to zero, in actual use, we can also think so, but in order to prevent the bearing inner ring cooperate with the minimum limit of size of the shaft as inner ring rolling, the surface of the shaft damage, so our bearing inner ring have 0 - several um under partial tolerance to ensure that the inner ring does not rotate, so bearing generally choose transition fit, even if is to choose the transition fit may have more than 3 interference of silk;
The shaft and the bearings are generally used in conjunction; The shaft and pulley are generally used for clearance, and then bolted to the anchor. The cooperation is divided into surplus, the gap, the transition three kinds, the specific check the mechanical design manual.
Axis and pulley: Motor shaft and the pulley clearance fit, and then add the positioning of the key, if is excessive, the motor shaft heat expansion going up bad pulley, so want to have a gap!
