Wie immer vielen Dank für deine netten und aufmunternden Kommentare, Stefan. Ist mir auch erst beim Schneiden vom Video aufgefallen, dass ich 90° versetzt habe, was ich normalerweise versuche zu vermeiden. Man verstärkt ja sonst wie du sagst nur die langen Wellen der vorherigen Schabestriche. Sehr spannend, was du von den Gravierern schreibst, davon wusste ich bisher nicht.

Hi Stefan......I follow you.....good to see you here with another "kindred spirit"........cheers, David

@@anengineersfindings Alex, I've seen some wood carving chisels sharpened pretty much like this to avoid digging in too. Thank you for this video -- I had never considered that steel & cast iron would scrape differently, but your explanation makes it very clear!

There is very little information on scraping carbon steel - thank you for sharing this!

Hi David, very nice of you to say that, but I figure no person can achieve a real level of excellence - there are always flaws in man-made things, you just have to look closely enough. Sorry, but I will continue thanking my viewers, :) because life taught me that among the many people I meet face to face, there are only very few who are sensitized or interested enough to appreciate the work or solutions I come up with. Consequently I appreciate it very much, if I can reach out to people with a similar background, interest or passion if you will. All the best for your upcoming reconditioning-job. ;)

Many thanks, Mr. Martinez and all the best for your projects.

Thank you Sir and good luck for your scraping work!

Glad you like them, Mr. Hendrickson!

Thanks, I'm very glad if the content is useful.

Thank you very much, Mr. Maltais. Glad if you don't find my videos too "schoolish". And the way I see it, the topic is metal related, so why not a metal audio-intro. ;)

Thank you for your very interesting comment, Sir. Very interesting to hear about the techniques you tried to scrape mild steel. Was it the steam turbine housing's parting surfaces that you had to scrape? WOW...! Please let me know about your results with the technique of this video. Thanks for the pizza and the beer - I'll try to get some today to comply with your nice comment :D

Glad the technique works out for you. ATB

My pleasure!

Thanks, Todd.

Thank you for your kind words, Sir. I am working on a new 4-part video series, which I'll hopefully be able to post soon.

Thanks, Mat.

Thanks, glad you find the content useful.

Hi Robin Please give him some love on your channel This was a gem found!!!

Very interesting, thanks for that comment!

Very good observation, Sir. When I made this particular video, I wasn't aware yet that it's more smart to use diamond cup wheels radially from inside to outside. Robin Renzetti mentioned this recently in his video about making boring bars. Good point.

Gern geschehen, freue mich wenn dir das Video genutzt hat! BGr, Alex

Dauert noch, ich habe keine Quelle für so flache Carbid Rohlinge und benutze deshalb alte Drehbank-einsetzplättchen die sehr dick sind, braucht ewig für so eine Geometrie.

Yeah I think pull scraping adds a natural self regulating stability to the forces.

Close! It is an Emco Maximat V13 (1000mm tip width).

Die HM-Rohlinge, die ich hier zeige, hat mir ein Freund geschenkt. Deren Cobalt-Anteil oder ursprünglichen Verwendungszweck kenne ich leider nicht. Aber sie arbeiten bestens sowohl auf Stahl als auch auf Grauguss oder Aluminium, und das zählt für mich.

Nice, thanks!

Dale, which blade geometry did you use back then?

as I remember it was just square like for cast iron and flip tool over when dull. i'll test my old tools

Hi Mads, very interesting idea, however, I think this would sooner or later become troublesome, since on the multi tools I know the lift is very little and not adjustable. This would slow down the scraping process notably, I think.

@@anengineersfindings Think I’ll give it a shot. Just silver solder a peace of carbide to an old blade. 👍🏻

Good point, thanks!

Thanks for your nice comment, Mr. Bruun. The straightege is made up from two rods of carbon steel with a lasercut fillet welded in between. The fillet is designed to be most rigid in shear, which gives high bending rigidity of the assembly. The welds are critical in terms of the edge's precision over time. What matters most is to induce the least residual stresses with welding as possible.

An Engineer's Findings thank you 😊 Did you then scrape in the straight edges or are they surface ground?

@@madsbruun8423 Of course it is scraped, the technique for this is shown in this video (scraping of carbon steel!). I have no access to such a large surface grinding machine. Thanks, Alex

Well done, and thanks. Please keep posting 🤙🏻

Servus, siehe kzfaq.info/get/bejne/j8een9ySzb2of6s.html Schöne Grüße, Alex

Yes, Donald, the straightedge shown is custom made for the purpose shown in the picture. It is a welded design (with carefully thought out weld design and strategy), made from carbon steel and scraped to my grade 00 surface plate (with a scraper blade as shown in the video). This straightedge cost me in total about €50 (mostly for the laser cut fillet-sheet) and I could fabricate and scrape it to finish in about 5-6 hours.

Outstanding, Alex! Sometime I'd love to hear more about your straightedge design and fabrication strategies. I assume that you went straight into scraping just after fabrication, with no need to surface grind?

That's right, Donald. I have no access to such a large surface grinding machine, so I rough it in with the angle grinder and then scrape it to precision finish from there.

An Engineers Findings what did you use as a mold to acquire a long straightedge?

@@anengineersfindings Good job! Is that straight edge geometric stable over time? I could use such one for my Maho MH500 rebuild.

Thanks for the advice, but I haven't had problems with chips in my hands yet. More common to me is burnt skin from hot chips on the lathe or mill. Yes, the parts in the background are the jaws of my newly designed press brake.

yes, hot chips are a problem... I use pieces of plexiglass stuck in T slots to mitigate this, but regarding the "needles", in my case they were dirty with remnants of the coolant previous owners used, and it probably had some bacteria living in it still, because after digging them out, it wouldn't heal right away, worse then these was only carbon fiber epoxy strands stuck in the skin after part trimming, thick leather gloves solve the CF splinter issues, but with the steel ones, I tried thin rubber gloves, thick rubber gloves, leather gloves etc, and those splinters just kept moving through the glove into the skin, I'm no safety nazi, but that experience for me was in the same category as stringy stainless steel chips on the lathe - 99,99% chance of a cut if touched with bare hands Good luck on the press brake build, I'm in a quite dire need of a ~1m aprox 25t press brake myself, but I think I'll get something from the used tools market and do refurbishing if needed.

Hello Mr. King! Many thanks for your comment, I'm very honored to find you were watching my video. Stefan already told me about the technique that you teach for scraping steel. Unfortunately I didn't have a chance so far to try it because I have no power scraper. Please let me know if the tip grind shown in the video works out for your steel scraping work. Best regards, Alex

An Engineer's Findings I seldom scrape steel anymore and have never had problems using the 5 degrees. If you have discovered the new way, congratulations. I scrape cast iron machine tool ways and would never make a steel straightedge. I make cast iron straightedges. As all other famous companies like Brown & Sharp never made steel straightedges. I've seem a steel rule made by Starrett but there not made for scraping.

Should be possible, but I'm sure that's tedious because of quick dulling of the blade.

@@anengineersfindings is it necessary or your method also prevents chatter on soft steel

I can sell you one. Just contact me through my youtube-email address. Thanks.

Wenn man nur Schruppen würde, könnte das sein. Allerdings trägt man beim Schlicht-Schaben ja nur in Mikrometer-Größenordnung ab. Ich denke das funktioniert nur deshalb so kontrollierbar, weil man mit einer definiert im Eingriff befindlichen Schneide arbeitet.

@@anengineersfindings Ich kann folgen. Jedenfalls ist es erstaunlich, welche feinen Genauigkeiten die geübte Hand erreichen kann. Tiefer Respekt.

Perplexed? I'm not sure what you mean exactly.

@@anengineersfindings I'm perplexed as to why you are not using a similar technique, despite your results, which seem sufficient. . .they all seem to favor a "monodirectional" singular cut rather than the continuous motion that you were using.