Top quality Chris! I'm constantly surprised of how tiny the tools are that you're making. It looks quite normal at first until a giant hand comes into frame.
Excellent video, as always. It's a joy to see a skilled machinist at work. I should also mention that I misunderstood the title, and spent the whole video trying to figure out how you were going to make a steel tool hard enough to ream out holes in horological jewels.
that is usually done with diamond loaded copper or bronze tools, more or less diamond grinding, or by mounting a diamond in same and grinding to shape on diamond wheel or loaded copper/bronze disk, takes quite a bit of time to do.
@@AsymptoteInverse ah, yeah, no steel is that hard, hard enough to break but not enough to cut. my training for machining is not horology but analog scientific instruments, several overlaps, like jewel bearings on dials, precisely cut gears... so frequently I have had to make parts not available through conventional channels (proprietary threads, odd sized and/or shaped jewel bearings...)
When using a large amount of borax (sodium tetraborate, Na₂B₄O₇) during the heating of a steel workpiece before quenching, surface boriding can occur. Boron from the borax can diffuse into the surface layer of the steel at high temperatures, forming iron borides. This process is called boriding and results in increased surface hardness, wear resistance, and corrosion resistance.
Возможно это и происходит при сварке дамасской стали. Там конечно разные стали используются но бор компенсирует выгорание углерода при многократном нагреве.
I didn't know that either. That sounds like both a good and bad thing depending on what the part is going to be used for. Thank you very much for sharing, You learn something new every day. 🙂
@ Evaluation of Increased Durability: On average, boriding can increase the durability of cutting tools (including reamers) by 2-4 times compared to conventional hardening without boriding. In some cases (e.g., when machining abrasive materials), the increase in durability may be even more significant. Limitations and Features: Brittleness of the borided layer: The boride layer is extremely hard but brittle. This can cause chipping of the cutting edge under impact loads. To minimize this effect, it is critical to select the appropriate thickness of the borided layer (typically 50-200 µm). Steel composition requirements: Boriding is most effective for steels with high carbon and alloying element content (e.g., tool steel). Operating conditions: Boriding is particularly beneficial for tools operating under abrasive wear or moderate impact loads.
Fantastic work but an explanation on the reason behind the cutter geometry would be nice or perhaps you've covered this in another video I haven't seen.
Don't stop dreaming, I got one last year after a few months of saving and it's been a blast! I'm sure if you really want to you can get one eventually!
Top quality Chris! I'm constantly surprised of how tiny the tools are that you're making. It looks quite normal at first until a giant hand comes into frame.
Excellent video, as always. It's a joy to see a skilled machinist at work.
I should also mention that I misunderstood the title, and spent the whole video trying to figure out how you were going to make a steel tool hard enough to ream out holes in horological jewels.
that is usually done with diamond loaded copper or bronze tools, more or less diamond grinding, or by mounting a diamond in same and grinding to shape on diamond wheel or loaded copper/bronze disk, takes quite a bit of time to do.
@@najroe That's why I was confused. I was PRETTY certain steel couldn't be hardened enough to cut ruby, but I wasn't CERTAIN.
@@AsymptoteInverse ah, yeah, no steel is that hard, hard enough to break but not enough to cut.
my training for machining is not horology but analog scientific instruments, several overlaps, like jewel bearings on dials, precisely cut gears... so frequently I have had to make parts not available through conventional channels (proprietary threads, odd sized and/or shaped jewel bearings...)
When using a large amount of borax (sodium tetraborate, Na₂B₄O₇) during the heating of a steel workpiece before quenching, surface boriding can occur. Boron from the borax can diffuse into the surface layer of the steel at high temperatures, forming iron borides. This process is called boriding and results in increased surface hardness, wear resistance, and corrosion resistance.
Thank you Sergei, appreciate you sharing this - Cheers :)
Возможно это и происходит при сварке дамасской стали. Там конечно разные стали используются но бор компенсирует выгорание углерода при многократном нагреве.
I didn't know that either. That sounds like both a good and bad thing depending on what the part is going to be used for. Thank you very much for sharing, You learn something new every day. 🙂
@ Evaluation of Increased Durability:
On average, boriding can increase the durability of cutting tools (including reamers) by 2-4 times compared to conventional hardening without boriding.
In some cases (e.g., when machining abrasive materials), the increase in durability may be even more significant.
Limitations and Features:
Brittleness of the borided layer:
The boride layer is extremely hard but brittle. This can cause chipping of the cutting edge under impact loads.
To minimize this effect, it is critical to select the appropriate thickness of the borided layer (typically 50-200 µm).
Steel composition requirements:
Boriding is most effective for steels with high carbon and alloying element content (e.g., tool steel).
Operating conditions:
Boriding is particularly beneficial for tools operating under abrasive wear or moderate impact loads.
Impressive workmanship, as always
Thanks Chris. You got me back in my own lab/ shop fixing some time works, but working on my own styles. Cheers.
Chris, in real time how long did it take to make the reamer? 👍🏴
Filming the process means that there never is such a thing as 'real time', but I guess it would take about an hour if not filming? Cheers :)
I swear you would make a washer look like jewelry.
Thank you mate, I appreciate you taking the time to watch :)
Just came to say I was the first subscriber to this channel. Have a nice day.
Fantastic work but an explanation on the reason behind the cutter geometry would be nice or perhaps you've covered this in another video I haven't seen.
Ignore me you explain it all in the other video thanks I somehow missed seeing it when it came out.
Hand filing better than some dbit grinder jobs.
Are you using silver steel for the reamer or O2 ?
❤
Beautiful work as always. However... I know what a reamer is. I do _not_ know what a "jewel" reamer is. Would anybody care to enlighten me?
wish i had the money for a desktop lathe
Don't stop dreaming, I got one last year after a few months of saving and it's been a blast! I'm sure if you really want to you can get one eventually!
this guy has a pole lathe on his channel. start small. lots of dudes made them from scratch on youtube with a drill or anglegrinder to power it.
Save money and get started. Go to a makerspace or a trade school. There are many ways to get access to tools. Make stuff. It's life changing
👍👍
i don't get it. what the "jewel" part of this? 🤷♂️
first
🥇
Pointless and useless this seems.
Compared to what?
@@bradley3549 Compared to making to making Earth shattering comments on videos, maybe?