What is maximum material condition example?
In GD, maximum material condition (MMC) refers to a feature-of-size that contains the greatest amount of material, yet remains within its tolerance zone. Some examples of MMC include: Largest pin diameter. Smallest hole size.
What is maximum material condition in GD?
Maximum Material Condition (MMC) and Least Material Condition (LMC): Simple Definitions. MMC is the condition of a feature which contains the maximum amount of material, that is, the smallest hole or largest pin, within the stated limits of size.
Where are MMC and LMC used?
Maximum material condition (MMC) is used to indicate tolerance for mating parts such as a shaft and its housing. Least material condition (LMC) is used to indicate the strength of holes near edges as well as the thickness of pipes.
What is a material condition?
LMC Least Material Condition is defined as the condition in which there is the least amount of material, the largest hole or smallest pin, within the stated limits of size.
What is maximum material limit of hole?
Explanation: Maximum material limit of hole is smallest diameter of hole. Minimum material limit of hole is largest diameter of hole.
What symbol means maximum material condition in geometric dimensioning and tolerancing?
To apply the maximum material requirement to a dimension, you write after the size tolerance in the feature control frame. “M” stands for “maximum material condition” (MMC). This symbol indicates the application of maximum material requirement.
Why is LMC used?
The least material condition is used to manage the size and position of holes, as well as the thickness of the material. For example, if a part’s hole has imprecise size or position under the least material condition (the hole has maximum size), the part will have insufficient strength and may break.
What is LMC virtual condition?
Virtual Condition is defined as the boundary generated by the collective effects of the specified MMC limit of size of a feature and any applicable geometric tolerance. For example, the MMC size of a shaft plus its axial Straightness tolerance, or the MMC size of a hole minus its Position tolerance.
What is the MMC of hole D?
Maximum Material Condition (MMC) It is the smallest hole diameter because a larger hole removes material, hence the smallest diameter provides for the greatest amount of material.