What is MMC in AutoCAD?

What is MMC modifier?

Maximum Material Condition Modifier (MMC): The circled M. This provides a feature with additional geometric tolerances as the feature’s size departs from its maximum material conition.

What does MMC and LMC mean?

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 the M in GD&T?

“M” stands for “maximum material condition” (MMC). This symbol indicates the application of maximum material requirement. The axis with a diameter of 20 mm (0–0.2) must be between two planes separated from each other by 0.3 mm and parallel to datum A.

Why is MMC used?

Reason for Use:



If you want to ensure that two parts never interfere, or limit the amount of interference between the parts when they are at their worst tolerances, MMC can be called out. Take a shaft that must go through a hole with clearance between the two.

What is the difference between MMC and MMB?

The MMC size is the largest size, and the MMB is the boundary perpendicular to datum [A]. The diameter of the MMB is equal to the MMC size plus the Perpendicularity tolerance.

What is MMC?

Slang / Jargon (6) Acronym. Definition. MMC. Microsoft Management Console.

What does MMC stand for?

MMC means “Multimedia Card.”

What are the 3 types of tolerances?

These are grouped into form tolerance, orientation tolerance, location tolerance, and run-out tolerance, which can be used to indicate all shapes.

What is MMC in drawing?

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. LMC is the condition in which there is the least amount of material, the largest hole or smallest pin, within the stated limits of size.

How is MMC calculated?

For an feature of size specified at MMC, Resultant Condition = LMC + Geometric Tolerance allowed. This is a single tolerance and size event.

What does MMC on Datum mean?

MMC symbol next to a Datum (must be a feature of size also) = something completely different: it means you get to shift the tolerance zone over by the amount the Datum is over it’s smallest allowed size.

What are MMC LMC and RFS?

MMC – Maximum Material Condition. LMC – Least Material Condition. RFS – Regardless of Feature of Size.

What is MMC virtual condition?

Virtual condition is the theoretical extreme boundary condition of a feature of size generated by the collective effects of MMC and any applicable geometric tolerances.