CLIMB MILLING vs CONVENTIONAL milling

Climb milling vs Conventional milling. Cons / Pros and some analysis why parts can fly away.
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[@mihirpatel7973]

without saying single word, Made 100% worthful...Thank you

[@GBWM_CNC]

I'm glad you like it! :)

[@bobmac9070]

As a tooling engineer for a major end mill company it was a fairly decent explanation However you needed to explain that in climb milling (if possible) all the heat goes into the chip and not the tool or material. The parts are barely warm to touch. In climb milling your taking the heaviest cut first then thinning the chips out which is less wear and tear on the tool and better finish. In conventional milling you’re starting at a zero chip and increasing it to heavy chip (equal to feed per tooth.) which creates a lot of heat/friction, in the tool (destroying cutting edge) and putting heat into the part as well. The finish is only fair. If your machine ways are good climb milling is preferred especially when using carbide end mills.

[@GBWM_CNC]

Thanks for your input. I really appreciate any hints and advices, especially from professionals!

[@MFEeee]

Perfect explanation. Now I know conventional milling with conventional machining

[@GBWM_CNC]

:)

[@2wheelwanderer]

Strictly a curiosity question, what is that clacking noise when your mill is running?

[@GBWM_CNC]

Before I disassembled it and assembled together - there was some play in the gearbox. Now on the other hand I'm still having a little issue with clacking noises at the angled gear between the spindle and the Y-axis beam. The teeth are worn there and that might be an issue with which I didn't have the possibility to deal yet.

[@JV_CNC]

In other video's people use the meaning of climb milling and conventional milling in the opposite way. Very confusing. Sometimes the words upmilling and downmilling are used which gives more confusion. In my opinion your explanation in this video is the right one. In CNC machining I use G41 for climb milling and G42 for conventional milling. Can you affirm this? I am from Belgium in western Europe and not a native English speaker, maybe this is the reason of my confusion.

[@GBWM_CNC]

Hi! I don't use the G41 / G42 but from what I read on the web it off-sets the tool to the left of the material, so if you're using M3 Clockwise Spindle rotation, then yes - it should be climb milling.

[@JV_CNC]

@@GBWM_CNC With G41 the tool is at the left side of the material and rotates clockwise with M3. If I mill a square block it means that the tool moves in a clockwise direction around the circumference of the block. This is climb milling. Right??

[@jerle1703]

For the same milling of 1mm, the size will be different between down milling and up-cut milling, and the surface gloss will also be different.

[@tartorstyx5104]

Hi! @4'53" that is a lot of backlash in the handle. Have you checked the wear in the guide ways?

[@GBWM_CNC]

Yep! The guide ways were worn on the end quite a bit. I adjusted it a bit but still it's not as perfect as it could.

[@kdenyer1]

Generally conventional milling should be used on machines with just a screw and a nut. More modern manual machines with backlash eliminators and CNC machines you should be fine cutting both ways. Generally inserted cutters work best cline milling. 😊

[@GBWM_CNC]

I didn't know the insterted cutters work better with climb milling. Have to check it out :)

[@acroduster]

Your thumbnail is drawn exactly opposite of correct. And solution, get good ball screws and maintain your machine to tight tolerances then enjoy climb cutting and the better surface finishes that come with it and the longer tool life!

[@GBWM_CNC]

Depends how you look at it. Considering the straight arrow is machined part movement and round arrow is the end mill rotation then I think it's ok - or you don't agree?

[@acroduster]

@@GBWM_CNC if you go by convention of nomenclature all motion is always considered relative to tool, so yeah this was all defined clearly in machineries handbook since the days of my grandfather, but sure you a KZbinr re describing what's been known for decades is doing great trying to work salad and saying it depends on perspective. The perspective was defined for the industry before you or I were born. And your thumbnail will still make every learned veteran cringe lol

[@GBWM_CNC]

@@acroduster I'm sorry for hurting your feelings. I'm just making videos to pass over some basics to people who don't have those basics. Also I'm just a hobbyist having fun in the workshop, trying to share what I learn in my shed :) Also speaking of the arrow - what if you mill the opposite side of the part considering the arrow shows the motion of the tool, not the part. Is that still the same type of milling or not?

[@acroduster]

@@GBWM_CNC you did not hurt my feelings, I'm just pointing out that newer generations don't even bother learning convention and nomenclature, but think they are teaching. It's hilarious. And again. If you g Had ever opened and read machineries handbook it's all there. But new generations think they are discovering something new all the time. And they don't care that they can cause confusion for others by not adopting convention. It's all just ego exceeding common sense. It' is content for the sake of content.

[@DaniGirl6]

This is called not knowing what you're doing and not knowing your machine. Didn't have have the table lock on to create drag and prevent the chaos huh? Well, now you know for next time. A half inch end mill and shallow cuts first is less likely to grab and pull the table away if you want to practice first. Ball screws are not the only way to manage the backlash problem like CNC button pushers like to think they are.

[@GBWM_CNC]

This is because this is my first mill so actually you're right - I didn't know my machine at all haha. Sometimes I have to learn on mistakes. Now I know how to do it right :) And I'm sharing videos containing my mistakes to let other people know what not to do. Also the table lock was broken in the X axis (just the Y axis lock worked fine) thanks for your input! :)

[@DaniGirl6]

​@@GBWM_CNC I bet it turned into a day of tramming and tuning your gib screws. Anyways, happy milling.

[@GBWM_CNC]

@@DaniGirl6 Well - at this point the machine looks quite different. It's got ball screws installed, refreshed a bit and its a bit CNC let's say :) But I don't remember if this caused any damage back then

[@dieSpinnt]

@@GBWM_CNC Well, the explanation of the physics behind the failure was very good. That's something you have to learn and know when you are professionally trained in the trade of a machinist. I guess you are trained that way ... and if not: also good work as a science communicator:) I think DaniGirl's suggestion is whole hearted, but she didn't get the message of your great video, hehehe. Everything what she said was already on screen and is highly specific ... You showed that just with the concept of mathematical formulas in a GENERAL way for every cutter, tooling, workpiece material, drive-method and clamping force. So: Thank you very much for that great video, GBWM!:)))

[@peeeoii2738]

Found the Fudd machinist, welcome to the feature