The shaft and bearing tolerance to cooperate

FAG bearings and cooperation between shaft and bearing seat is by ISO tolerance and bearing inner hole tolerance Δ DMP and outer tolerance Δ DMP resolution. The tolerance zone, ISO tolerance defined in a way that is tolerance zone. Tolerance zone is by their relative datum interval ( Location = tolerance zone) And the difference in size ( = tolerance zone level) The resolution. The tolerance zone position with letters ( Small said the hole tolerance, capital letter said shaft tolerance) 。 Rolling bearing is the most commonly used fit tolerance representation of figure 1, line 2, the nominal diameter 3, 4, loose fit transition fit 5, interference fit 6, 7, trunnion bearing hole Δ DMP, bearing inside diameter tolerance Δ DMP, bearing outside diameter tolerance of shaft and bearing hole tolerance band centripetal bearing diameter of axle of cylindrical hole tolerance 1) Facilitate device (2) C / P> 103). C / P> 124). C / P> 125). C / P> 10 thrust bearing shaft tolerance 1) The G7 used to made by gray iron bearing seat, if bearing outside diameter D> The difference in temperature between 250 mm and the outer ring and bearing & gt; 10K。 2) F7 used for grey cast iron manufacturing bearing seat, if the bearing outside diameter D> The difference in temperature between 250 mm and the outer ring and bearing & gt; 10K。 Thrust bearing housings tolerance possible bias, special application for touch running accuracy, smooth operation level or working temperature. Running accuracy higher demand smaller tolerance, tolerance is higher than 6 level of tolerance for level 5. If in the process of operation FAG bearing inner ring temperature higher than axis, cooperate will become loose and beyond the allowable value. So you must choose tighter fit, for example with alternative k6 m6.