I have been watching your videos for some time now, I must say I am going to steal some of your teaching visual explanations because you did a great job explaining this in layman's terms. As a programmer I have been struggling with how to simplify and explain all of this to my machinists. Particularly I loved the way you explained helix angles at 9:00, because it seems like everyone kind of glosses over this very key element to machining. Your tip for de-lamination by ordering a custom left and right hand helix that meets in the middle is going to save me thousands upon thousands of dollars!! I appreciate all of your time and dedication to teaching :)
Awesome information. I’m a home shop guy that finally added a mill to my shop last year. I was fortunate to get a pile of end mills with it and have been trying to get an understanding of which ones are best suited for various tasks. These video have helped a lot. Thanks!
Thanks, I thought of it when I was playing with my son. He has playdoh toys that you roll out patterns with. I thought it would be a good way to unwrap an end mill to a 2D surface.
Great video sir, I am a self taught novice machinist, at work I am asked to do a lot of micro machining on 304sst thin wall tubing using .020 - .040 diameter end mills and have a lot of problems getting the correct IPT. The standard lookup charts do not seem to go below 1/4" and all show that the IPT should be around .002" but if I run those little end mills at that rate they just break imediatly. I typically order solid carbide end mills which are very brittle and don't like to flex at all maybe I would better off using HSS. Any advice you have would be greatly appreciated
Talk to the tool mfgr, they will have suggested feeds and speeds. Harvey tools has recommended charts on there website. For mills that small your down into the 0.0005" to 0.0002" chip load. Tool run out is critically important for those tiny mills. You also need to spin them really fast. The high speed helps stabilize them to some degree.
They call those dual helix endmills "compression" endmills for just that reason. they are very popular for use on CNC routers. they really are quite perplexing to look at too, haha
Was looking at the awesome video. Is it possible to calculate the roughness, taking in consideration of the helix angle? The flutes, cutting speed, feed and the helix angle gives different roughness.
You could calculate the best surface finish you could hope for, but in reality I don't think you would get very close. It would be difficult to take into account for tool run out, deflection, cutting edge radius and a whole slew of variables that are hard to nail down.
Thanks for the info, what is best to use for cutting slots in aluminium, I need a really smooth finish, I cant have chips building up and scratching the finish Thanks
I'm here from UW-Stout ETECH 252!
I have been watching your videos for some time now, I must say I am going to steal some of your teaching visual explanations because you did a great job explaining this in layman's terms. As a programmer I have been struggling with how to simplify and explain all of this to my machinists. Particularly I loved the way you explained helix angles at 9:00, because it seems like everyone kind of glosses over this very key element to machining. Your tip for de-lamination by ordering a custom left and right hand helix that meets in the middle is going to save me thousands upon thousands of dollars!! I appreciate all of your time and dedication to teaching :)
Awesome, plagiarism is cost effective, if I do save you thousands I have a patron page setup ;)
Awesome information. I’m a home shop guy that finally added a mill to my shop last year. I was fortunate to get a pile of end mills with it and have been trying to get an understanding of which ones are best suited for various tasks. These video have helped a lot. Thanks!
great job . as a machining student its something which i was looking for
This was extremely helpful and informative. Thank you!
Very good explanation, easy to understand. Thank you
great explanations, love the play dough idea, thanks
awesome idea using the putty to show helix angles and explain. thanks!
Thanks, I thought of it when I was playing with my son. He has playdoh toys that you roll out patterns with. I thought it would be a good way to unwrap an end mill to a 2D surface.
Great idea! Keep up the good work. I have two 4020's that im attempting to power on and get rolling.
Awesome, if you can post some videos!
Well done. Thank you!
I will use some of this to teach my high school students, it's superb.
Awesome content Love it .
All your videos are excellent and informative. Why did you stop!?
good one, simple explanations, or as simple as an engineer can be, but good I learned something.
Thanks again John, I skipped the carnival music on this one for you ;)
Thanks! 👍
Thank you.
really great video! thanks man i learned a lot!
Thanks!
well done. Can you make a video about how to calculate the cutting force and clamping force?
Great video sir, I am a self taught novice machinist, at work I am asked to do a lot of micro machining on 304sst thin wall tubing using .020 - .040 diameter end mills and have a lot of problems getting the correct IPT. The standard lookup charts do not seem to go below 1/4" and all show that the IPT should be around .002" but if I run those little end mills at that rate they just break imediatly. I typically order solid carbide end mills which are very brittle and don't like to flex at all maybe I would better off using HSS. Any advice you have would be greatly appreciated
Talk to the tool mfgr, they will have suggested feeds and speeds. Harvey tools has recommended charts on there website. For mills that small your down into the 0.0005" to 0.0002" chip load. Tool run out is critically important for those tiny mills. You also need to spin them really fast. The high speed helps stabilize them to some degree.
Explaining helix angle with a Helix-brand triangle 👍
Didn't even notice that, LOL
They call those dual helix endmills "compression" endmills for just that reason. they are very popular for use on CNC routers. they really are quite perplexing to look at too, haha
Yes they are, but if your cutting any type of composite, they are gold!
13:18 High angle? or low?
best
Was looking at the awesome video. Is it possible to calculate the roughness, taking in consideration of the helix angle?
The flutes, cutting speed, feed and the helix angle gives different roughness.
You could calculate the best surface finish you could hope for, but in reality I don't think you would get very close. It would be difficult to take into account for tool run out, deflection, cutting edge radius and a whole slew of variables that are hard to nail down.
Thanks for the info, what is best to use for cutting slots in aluminium, I need a really smooth finish, I cant have chips building up and scratching the finish
Thanks