How GD&T Maximum Material Condition (MMC) Works with Clearance Holes 

Thank you for watching and commenting Karthi! Enjoy the rest of your weekend!

Hello kslats916! First, thank you for watching! Second, thank you for taking the time and interest to write such a helpful comment! You took time out of your day to write a longer comment that was full of very useful and motivating critiques! I am also a mechanical engineer as well as a maker, a welder/fabricator, machinist, and all-around curious person. I dive into numerous topics and sometimes it is difficult to find enough time in the day to follow all of my passions including creating videos on GD&T. I am, however, hearing from numerous people that they think this channel could expand and be something great if I invest more time in it and so I am planning on devoting more time to it here going into the future. Thank you again for watching and for providing the motivational critique and uplifting words of encouragement! If you have any personal thoughts, advice, questions, or want to share info about projects you may have going on, I'd love to talk more with you. My email is calebsokoll@gmail.com Have a wonderful day kslats916!

that second advantage of using the MMC condition is also well understood. My understanding is as follows. Since we can't change the hole positioning after it has been drilled, before throwing the part, at least we can do is to see the ALLOWED hole diameter for the current (deviated (already drilled)) position of the hole from the chart, and then enlarge it to that particular (allowed) hole diameter.

Hi skankhunt42! First, I see you man! I appreciate your various quality comments on several of the videos so thank you! Second, your takeaway from the video is perfect! How much the hole diameter size deviates away from its MMC size is considered "bonus" tolerance and so that means you get to add that amount of deviation to the position tolerance. Obviously this does not go on forever as you are not allowed to machine the hole any bigger than what the size tolerance states. So once you reach the maximum hole size allowed you have to stop there. Otherwise the part will fail due to the hole size being too large. Thanks again for watching and for the awesome comments! Stay safe and healthy!

Hi there Trayjan00! I'm glad you found this useful! I find that a lot of times GD&T is taught from a theoretical perspective and it can be hard to then apply it to practical scenarios. I hope the mini-assembly was useful in understanding how MMC can be applied to clearance holes from a practical perspective. Remember, MMC is a great tool to use any time you are dealing with any type of "Clearance" feature (where one features fits through or in-between another feature). MMC preserves functionality while giving the overall design and machinist additional tolerance to take advantage of just by modifying the size of the features. This is something that you simply can't do with traditional plus/minus tolerancing. Have a great weekend and stay safe and healthy!

Hi there Caiã Roberto Tabalipa! I appreciate the positive feedback! I know MMC can be a tricky topic, especially when it comes to its practical application and how it is interpreted by the manufacturing and inspection stakeholders. I do have a small request if you end up with a few spare moments, I am going to try to start understanding a little better who is watching and what their technical needs are. With that in mind could you reply and let me know what job you do and how GD&T is part of your work/hobbies/passions? Thanks again Caiã for watching and for participating in the comments section. Please stay safe and healthy and have a wonderful evening!

Hi there Helen!!! I definitely understand your struggle! I am a fellow engineer and so I definitely understand that it's not an easy degree to earn! I actually enjoyed my Machine Design course quite a bit. Understanding and learning how to compile materials, geometry, mechanisms, geartrains, and power sources all to achieve an end mechanical goal was quite fun and it felt like a much more applied coarse where I could actually see practical use for the concepts and theory being taught. Keep up the struggle and good luck! If you have any GD&T questions let me know in the comments section and I will do my best to respond!

Good morning Ars Umbris! Thank you for the compliment and encouragement! I will definitely continue. My plan is actually to start organizing the channel a bit and start a series of videos starting with the basics and working my way logically through the topic in a way that builds upon itself. Right now I feel like my videos are a bit random and hard to see the sequencing. But again, thanks for the kind words, for doing the RU-vid thing by liking and subscribing, and for sharing. That's very thoughtful of you. Have a wonderful rest of your weekend!

Hello Again Mr. Vanderloop! Thanks for the positive feedback! MMC and "Bonus Tolerance" are great tools for designers, engineers, and machinists to reduce cost so I hope everyone watching is able to understand how it applies to clearance hole features. Thanks again and stay safe and healthy!

Hi again Mr. E. RambleOn! I appreciate your participation across the comments sections! It's very affirming and motivational! Thanks for your viewership and feedback and see you around in the comments sections! Have a great day!

Hope you got that job ☺️

Hi there Angel! Thanks for the positive feedback! I've got two more videos out that explain how to calculate the correct clearance hole diameter to ensure absolutely no interference during assembly so check them out and let me know what you think in the comments. I personally can appreciate it when someone provide real-world practical knowledge and so that is my goal with these videos. Thanks again for watching and I hope to see you in the comments section some more. Have a great day!

Are you Mechanical Engineer??

@@Latestinfohub20 yes

@@shiwangijaiswal1606 Well nice to hear that and I think you are more bold as compare to other women. 😊😊😊😊😊

Hi there Andrei, I appreciate your kind words of encouragement! I was away for a bit, but due to the positive response from everyone viewing the videos I will be posting content on a much more regular basis. Again thank you for watching and participating in the comment section. It really helps to know my presentation and material is working well. Have a great rest of your Sunday!

Hello there Lalitha! I've got two new videos out. They are two method on how to properly calculate the diameter of the clearance holes I described in this video. If you use one of either of those methods you can be 100% sure your parts will fit together and function properly interference-free! Check them out when you get a chance! Also, thank you for watching and for giving your feedback here in the comments section! It is much appreciated! Have a great day!

Hi there Baki Solak, thank you for watching and for the kind words! I really appreciate the positive feedback! Keep watching as I have a new video coming out soon that will have a whole new, fresh format! Thank you again and enjoy your week!