An important concept in GD&T based on which the tolerance value changes . What are material conditions in terms of size of Features ?
Material conditions refer to the different ways that a feature or part can be manufactured and the resulting implications for the tolerance requirements. There are three main material conditions defined in GD&T:
By specifying a material condition, the designer can communicate the allowable deviation from nominal dimensions and help ensure that the part or feature will function properly in the final product. It is important to note that the selection of material conditions should be based on the intended function and manufacturing process of the part, and that different material conditions may result in different tolerances and costs.
For External features of size , Maximum Material condition is largest value of size dimension.
For Internal feature of size, Maximum Material condition is the smallest value of size dimension.
IN the below drawing , The Feature control frame has a M symbol beside the value of 0.1 for perpendicularity of the feature of size which has a basic size of 92.
This means that when the width of the component is at its maximum size the variation in Perpendicularity will be default 0.1 but as it moves away from its maximum material condition the value 0.1 will increase in proportion to the decrease in size of the width (92 dim)