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Kenne ich. Habe früher Draht-und Senkerodieren gemacht. Das gleiche Spannsystem hatten wir auch.

Dull files have their uses - I use them as sacrificial electrodes in electrolytic rust removal tank as they have a large surface area for their size. Acid etching that everyone raves about, just roughs up a file surface making it akin to a sanding stick. Folks think they are sharper because the worn out file they started out with, will now grind metal .... but not for long. A sharp file is a cutting tool and once you have blunted it, there is nothing that will restore it. Buy good quality files, store, clean and maintain them properly and they will last for years. Handy tip is to keep a few 'beaters' close to hand on the bench for those odd jobs that are likely to blunt a file, eg stock removal on hardened steel, where you don't need a good surface finish..... and be prepared to bin them afterwards. I can go through a couple of these re-profiling a hard steel Scandinavian axe head.

Very informative. Thank you.

This gentleman has a very intriguing affect. Excellent information presented here.

Thanks for a great informative video. I would like to add that balancing a 1/2 inch wide wheel is pointless and a total waste of time in a tool room. Get a sopko hub without weights for 1/2 inch wheels and save the balancing hub for 1" wide wheels. Over 30 years precision grinding and I have never once needed to balance a 1/2 inch wheel. Sometimes I change wheels multiple times a day. I probably have 50 wheels on a pegboard. One inch wide wheels that will stay mounted until they wear out on a wet grinder should be balanced.

Anybody know where I can score the upper belt cover for a rong fu 25

Marc is there a way when dressing the surfacing wheel with the diamond to prevent it from knock chips out of the outside and inside surface of the surfacing wheel. I noticed sometimes it will knock quite large chunks off the outside and inside of the surfacing wheel. If you slightly chamfer the outside edges it will cut down the actual width of your surfacing wheel.

Thank you, I'm a 7 month apprentice and your tips helped!

Funny thing happend we got a 10 foot bed surface grinder at work and im spose to figure it out. Itss goin just fine. Just fine. Anyone have advice?

Thank You Sir ! Great Presentation, I Learned a Lot HopeYou are Well 😀

this dude is so cool

Gran video, lástima que no esté en castellano! 10años ya desde su publicación? Será de mucha utilidad por mucho tiempo!

Marc - I'm also grateful for what you do to education aspiring machinists. Many of your videos have taught me how to use my father's Craftsman 109 hobby lathe, to prepare to teach blueprint reading, to learn home heat treating, and many other skills. I'll pray your recovery continues. Looking forward to more of your videos.

Excelente!!!

Nothing is perfect: thats why farenheit degrees...

I get the built up chips. Looks like it's time to replace the insert

Fabulous. I love your videos Marc

and tungsten carbide gauge blocks too bro

good to see you!

Excellent information, thank you

This video is meant for for the novice, and it covers the basics well. But please add the point that the work must be spaced off the table if you are cutting full depth. If you leave out the spacers you get a nice pattern on the top surface of your rotary table!

You are a wonderful person, a great example. Please check Dr. Erick Berg videos on cancer treatment through intermittent fasting. They will serve you well.

You sir are the "Jim Rohn" of CNC machines, thank you for your guidance and wisdom on my new found path.

you don't need to hardening the tap block: there are no necessity at all. The teeth of the tap should not touch the walls of the block, only shaft, otherwise tap will deteriorate.

Thank You for the clear information!

Thanks 😎

Thank you for the RUclips part drawings. This is re-teaching me on drafting drawings because I got aphasia after my 2021 stroke 3 years ago. You are a good teacher.

I hope you still read comments on your videos. You are Marc & we will always love you. be safe & happy (whatever).

You are a very good teacher

Part 1 = Part 4

I hope all is well! God bless!

Seems tile that’ll get exhausting for your arms , no ?

Great explanation! I needed a refresher on the reason for 29deg thread cuts and this was succinct and spot on.

Can you tell me the correct color paint for that rong fu green??? I want to retouch mine.. Thanks

Your channel here is great -- very informative. Maybe you can answer this next question, which was prompted by your discussion of the customary chisel edge on a typical jobber drill. At what step in the manufacturing of a drill tip is the chisel edge formed? I'm trying to understand how the chisel edge ends up being a sharp line. For instance, would the process go something like this: 1) start with a cylindrical metal stock of desired diameter; 2) then grind/machine the helical flutes; and 3) then use some sort of special grinding process to form the conical shape of the tip, i.e., with the desired point angle. I can't quite visualize if this in fact would work to leave the chisel edge. What do you thnk?

It's an amazing service you do for the community putting your skills and knowledge out there for us all for free. Thank you

I was following for about half way then I got confused.

Thank you ! Thank you ! Thank you !!!

A multimeter is a useful tool for figuring out what kind of metal you're dealing with. Different metals have different voltage potentials with respect to a reference electrode.

man i fucking love you

Great News about your health!!!!! I will be looking forward to seeing more of your you tube channel. It has been a Great learning source. Many Thanks

i worked with exactly the same machine for 10 years. Now i have 2 Studer S33 and a S41. Thanks for your work :)

Marc, somehow I missed this video. I hope your recovery is still heading in a positive direction. You are a wonderful teacher and I really do look forward to learning from your videos. Thank you so much for all you do in sharing your knowledge.

Thank you!

Best wishes for the rest of the year, wishing you a healthy and blessed new year. Peace and love

When you're file is fowled, stop chasing chicken with it! If you take a thin copper pipe, or a an old rifle casing, and flatten it and rubb it along the teeth, the fowl comes out! Do not use any stainless steel or brass or aluminum, on a file if it's gonna touch steel that will be blued in the future.

Very thorough.

Very good presentation. Thank you.

Thanks for sharing your knowledge. You made me be a better technician. Courage et tous mes vœux de rétablissement.

👍👍👍