6/9/2023 0 Comments Din tolerance chart![]() ![]() ![]() ![]() Should be used where no perceptible shake is permissible and, where moving parts are not intended to move freely under a load.Ĭlass V - Interference Fit - Considerable pressure is required to assemble these fits and the parts are considered more or less permanently assembled. Wobble or shake between mating parts noticed only on parts with short bearing length.Ĭlass IV - Transitional Fit (Snug) - Closest fit which can be assembled by hand and necessitates work of considerable precision. Part will turn and slide freely.Ĭlass III - Medium Fit - Running fits under 600 R.P.M and journal pressures under 600 lbs/sqin and for sliding fits. Wobble or shake between mating parts very slight. or over and journal pressures of 500 lbs/sqin or over. Select "Class XX" based on required functional fit to access page.Ĭlass I - Loose fit - Use for all possible hole - shaft applications where function will permit.Ĭlass II - Free Fit - Running fits with speeds of 600 R.P.M. The size ranges given are for typical size ranges utilized within industry.įor more industry standard tolerance data see: Mechanical Tolerance Standards Charts The following links are to General Tolerance Table Charts for Standard Shaft Hole Fits per McDonald Douglas Design Guide "Machining Tolerances". Standard Mechanical Tolerance Table Charts for Shaft - Hole Fits
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