End Mills, The Nitty-Gritty: Cutter Geometry
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- čas přidán 6. 07. 2024
- Hello everyone, welcome to At-Man Unlimited. End Mills, where the metal hits the work piece. They make the chips actually fly. The final link to making good parts.
In this series we are exploring the different aspects of end mills. Let’s look at the cutting geometry of an end mill and types of end mills. We will discuss how the geometry effects the function and use of the end mill.
Please keep in mind throughout this series that this is for entertainment only. While I try my best to have the facts straight I am not a tool designer or supplier. Some items in here are my opinion and should be taken as such. What works for me may not be right for you.
If you have any questions please feel free to comment or email me, AtManUnlimited@gmail.com
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patreon.com/user?u=4099018 - Věda a technologie
This was awesome. I'm 16 and I'm just learning. I totally understood everything when you used the card board and wood. Thank you so much.
Really good explanation... I used to read about tool geometry in my mechanical engineering studies and now I have a cnc at home so watching as a revision... Good job....
Nice use of CAD
*C* ardboard
*A* ided
*D* emonstration
It can be quite helpful to remember that we're never really cutting, but putting pressure on the material in the right way to get it to fracture where we want. There's a video on YT called 'Iscar Chip Formation' that's got slow motion footage of what happens in the cut.
LOL Thanks Paul, wait till the helix and flute video is released ;) I mentioned that video in one of my takes but it did not make it through editing. You are correct, it is more of a sharing action to cause the metal to break along a grain line. Here is the video czcams.com/video/mRuSYQ5Npek/video.html You can also see how the tool radius can effect surface finish and how material can build up on the cutter.
When you pulled out the cardboard and block of wood, I was like what the hell, but that was the best description of pos vs neg I have ever seen. It really made scene. Thks one of if not the best video on this subject. Truly thks man.
Wow, thanks, I just look at what I have laying around and make it work.
Congratulations! End mill geometry can not be explained more clear and simple than this
"Low to high" with a ball end mill? I had never heard of that, but it makes a lot of sense. Awesome! Thanks for this very educational video.
Your welcome, its all about keeping the center of the ball off the material if possible.
Yes, and it also reduces axial pressure which can be critical for smaller machines to be able to retain accuracy without the need for multiple spring passes. In addition it greatly reduces heat generated due to the ball's center region "rubbing" the material.
Hooray. I finally understand the anatomy of the end mill. Helps me to learn how to sharpen them on my new cutter grinder. Thanks for that.
Well presented, concise, and very informative. Thank you
Thanks
Thank You. Liked your video. Appreciate your time doing this.
Thanks!
You r awesome Bro, thanks for the knowledge
Great video / Very informative
One of the best explanation that I found anywhere on the web. Really nice and indepth information. If you could also make a video on how to calculate speed,feed, depth of cut for different tools and materials then that would be great. Thanks in advance
Great information. Great channel..... thank you very much
Welcome
Great job explaining the geometry and functions; now I'm going to go and try to figure out how to apply it to my new, 1st cutter grinder which just got here yesterday, it should be interesting. Thanks for the great job. I just subscribed.
Thanks and good luck grinding, that is an art alone.
Thanks for another great video buddy! Your detailed demonstrations are a great way to teach these concepts.
Thank you, need a better prop budget though ;)
very informative
Thanks
great video I wanna see about the helix angles. That will be interesting.
Oh that one is already in the works, I came up with an awesome way to show the helix angles and how to show there effects!
I’m a shop teacher and was wondering where you got that equipment in the beginning of the video to demonstrate the cutting action? The kids always say I don’t know what I’m talking about but WTF do they know!!! I feel the 2 very nice models you have access to could help me tremendously in the classroom… one day this kids mom said I was rude to her son so I told her to fuck off or suck me off!!!
I’m sorry I crack myself up
✌️💖&💡
Nice video.,,,,,,,,
Make a video on negative rake angle endmills and drill geometries
Good one, it would be interesting to see how they are sharpened.
John at NYC CNC did a video on a tour of AB tools. He shows the making of end mills and how they grind them from carbide blanks. Check it out, search "NYC CNC AB Tools"
완벽한 교육비디오다
Hello sir, I want to ask you about eccentric OD of end mill, means where it is use and why eccentric OD is provided to some End mill
I have never used one before.
What is the effect of helix angle in drilling process?
Helix angle of a drill controls chip evacuation. The harder the material the higher the helix should be.
Great series on cutters. Any chance of showing proper sharpening practices? I just got a used cuttermaster and although it seems straightforward it seems to be an art form.
Thanks, With the more advanced end mill geometry today, coatings, and other factors, I don't think to many people sharpen in house. Drill bits yes, but even some of the biggest shops around my area send there stuff out that I know of. As for drill bits, there are far more qualified people on CZcams that have made pretty nice sharpening videos already. So most likely wont see a sharpening video from me. I do have a bunch of very large HSS end mills that need to be sharpened though if you need practice ;)
If you are not in a big hurry I would be glad to sharpen them for you. I can only do sizes that fit in a 5C collet though. I am new to CNC and your videos have helped me quite a bit decide what machine to get. Glad to repay you with some labor!
I think all of them are 1" shank so they should fit, cutter diameters are 1" to 2" I think. They where donated by another viewer but I have not had a chance to get them sharpened. If you would like to have at them I can send some your way. No timeline, very appreciative of the offer, thank you. Send me an email, its in the description if you would like them shipped.
Oh, and holy crap that dyno video doing the WOT run is cringe worthy!
The FJ or Hellcat?
to minimize chip breakage at the bottom sunmica of a wooden door, what is the radius of a radius corner of an end mill required?
Corner radius is most likely not going to solve the issue. You may need some specialty cutters for the application.
dear sir,
hope you are doing fine and thanks for your reply. can you tell me what kind of specialty cutters for the same?
For any type of laminates they make end mills with a helix that converges in the center. That way the cutting forces tend to compress the material together and reduce chipping on one side you see with normal end mills.
Thank you sir! can you please email me the image of that end mill with a helix? exactly i am not getting or i have not seen end mill with a helix yet.thank you.
I wish you had more physical examples of everything
Working on it, going to try and pick the channel back up again
Очень хорошее,качественное видео. Если сможете, сделайте видео заточки фрез так же подробно, с детализацией каждого элемента. Спасибо!