MMB is defined as the lesser of two amounts calculated by the following methods: The member's benefits accrued and held under the ORSO scheme during the course of employment, i.e. benefits derived from employee’s contributions, plus the benefits derived from employer’s contributions under the vesting scale; or

2009年7月30日 · The MMB modifier signifies that the given GD&T callout is to be measured relative to a “datum reference frame” which consists of the given datum simulated at its maximum material boundary. So essentially it signifies that a datum shift may be allowed.

The goal of this blog post is to present the maximum material boundary (MMB) concept in GD&T applications. The maximum material boundary concept is simply the use of a maximum material condition on a datum feature, as shown in Figure 1 (the annotation B (M)). Its major use is to allow easier assembly conditions on a part.

Maximum Material Boundary (MMB) is a boundary that the datum feature of size will not violate. The MMB is calculated by combining the MMC size with any applicable geometric tolerance on the datum feature of size. The MMB is always outside the material. The figure below shows one example of a Maximum Material Boundary

Maximum Material Boundary: (MMB) Maximum material condition is that condition of a part datum feature wherein it contains the maximum amount of material within the stated limits of size. That is: minimum hole size and maximum shaft size.

The ASME Y14.5-2009 standard specifies how both the size and position or orientation tolerances of a datum feature are to be used in calculating the datum MMB or LMB. Refer to "ASME Y14.5-2009 Dimensioning and Tolerancing" section 4.11.6, "Determining Size of Datum Feature Simulators at MMB", and succeeding sections on LMB.

The new terminology is Maximum and Minimum Material Boundary (MMB and LMB respectively). The symbols (circle M and circle L), application and interpretation of the meaning remain the same between the 1994 and 2009 standards. Important! MMB and LMB do NOT provide ‘bonus’ tolerance in the same manner that MMC and LMC do. What they allow for ...

使命和職責 ; 機構管治及企業社會責任; 積金.誌; 機構活動; 積金之友; 社交媒體平台; 加入積金局; 認可供應商名冊; 內部員工 ...

2024年11月12日 · I am trying to evaluate this profile that includes an MMB modifier. I have calypso 2019 and 2022 so I don't currently have access to the Beta GD&T engine. I'm wondering if there is some sort of a formula that I can use to apply this MMB modifier.

2024年5月23日 · Maximum Material Condition (MMC) is a useful modifier in GD&T that can help reduce manufacturing costs while still ensuring part functionality. By understanding what MMC means, how to calculate it, and how it can be applied to GD&T controls like position or profile, we can optimize part functionality while achieving more economical manufacturing.