Watchmaking: Screw Making Techniques 

@4:39 Are you using chewing gum to remove the material

Thanks for the educational video and sharing your craftsmanship:) Regarding hardening: What alternatives do you plan to use for borax/boric acid? Both are not available for home users. AND FOR A GOOD REASON: In June 2010, ECHA added boric acid to the candidate list for SVHC (substance of very high concern). After the CLP regulation and the REACH amendment regulation 790/2009/EC came into force, boric acid was labeled as toxic to reproduction[1]. Mixtures that contain free boric acid in a concentration of 5.5% or more must also be labeled as toxic to reproduction according to the GHS regulation. [1] Meaning extremely harmful (teratogenic) for reproductive function or the child in the womb. So no joke! (see Contergan ... which also fell into this category)

Guys, this is a wonderful video. I an a vintage and NEO-vintage watch hobbyist in Singapore and Girard-Perregaux watches are my passion. Thank you for making this video. Question: I sometimes have problems removing caseback screws because of grime and such. Eventually when the screw is removed, the screw head is damaged. a) Is there a way for me to recut the screw heard slot in my home workshop? b) I sometimes want to order a new screw, but don't know the size. I measure with calipers and such but its still a hit and miss thing. How can I accurately get the screw size? Is there a chart to look up perhaps? or best ot contact Girard-Perregaux and ask them for the size used? c) Can you recommend the best place to order stainless steel screws from? Many thanks in advanced and best wishes from Singapore. Marc

And I am a 55 years old apprentice without a master, tell me about it!!!!

Someone had to at some point, you can't make a die without a tap, and a tap can only be made with a die, or single point turning, or grinding I guess, but that's probably a more modern thing. Thinking about how we got from using rocks for hammers to the machinery and precision we have now screws with the brain a bit

@AuschwitzSoccerRef. You mean 0.2mm

​@@mehmettemel8725an error of one decimal point is near enough for a country job😂

Right I was thinking same

@@JoshuaZiesmer Of course you can make a die without a tap. They are ground, not cut with a tap.

I was difficult don't kid yourself. What you did with the saw mill was awesome inpirering in it self.hard to compare the 2.

Lmao. The difference between someone with an iq of 100 and someone with an IQ of 140. 100 IQ thinks they are really smart, they don’t see the horizon. 140 IQ can see the horizon of their limitations and understands how stupid everyone really is, including themselves. You built a bandsaw, complicated if your IQ is 100. But only someone with an average IQ would think building a bandsaw mill is that complicated. A smart guy made the first one, after that it is all monkey see monkey do. You copied something at best. Plagiarizing doesn’t take a lot of brain power.

Was he at the meter works in Hollinwood?

@@grottonisred6541 no he was at Wythenshawe right by end of the runway at Manchester airport

Now you know a little bit. That's the joy of it.

Myford IS a manufacturer of small lathes. I had one for many years making model steam engines mainly. I do not think they make watchmaker lathes. Fabulous video and superb workmanship.

@@PaulStClair-or3gj Yep, my comment went WAY over your head. Some people, will understand.....

Nitre bluing.

I noticed one of the change gears is made from brass....likely to be a homemade gear.

I just make them by cutting strips of emery paper and using double sided tape to attach the paper to the plywood.

I've been thinking about getting a couple of rolled thread taps in 4/5/6 mm, as these are most-used in 'everyday' applications (for me), if you've used rolled-form dies, I'd be interested in your experience therewith...

@@derkarhu5079 this might be of interest to you? ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-yKthPYEKmPo.html I am using this type: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-4ziwnkv5FdM.html I didn't use large ones (you are talking about) because they are easy to do with conventional dies.

thanks for the info...the lathe work to 0,741, and parallel ... lovely! i see why they so excellent for miniature(isn't) screw sizes, but the improved strength of the thread could be important, even in larger sizes, although speed and tool life in a production environment are probably top priority. Domo arigato!

The watchmakers lathe is something we built using components from several machines but we also made some of the parts ourselves, such as the headstock. Thanks for watching!

If you search for 'Curator Bluing Salts', you should be able to find it from most horological suppliers, including eBay. Thanks for watching!

Metric threads are used in modern Watchmaking 👍🏼

Hi Pirmin, having a setup for holding the die and workpiece concentric will help a lot. Otherwise, all you can really do is take it slowly and gently, backing off the thread as often as possible. Hope that helps!

@@chronovaengineering i just started and found that backing of a lot helps a little ! but there is so little room for mistakes since u dont real feel if the thread is being cut or the material starts to warp and twist off. would you recommend to anneal the material ?

Annealing generally isn’t necessary unless you’re cutting hardened steel.

@@chronovaengineering yeah i just found out the hard way that my annealed injector needle just broke off exact where the annealed section ended. i will try to get a workholding setup where i can maintain concetricity. the hard part is that ihave no feeling on a lathe how the screw it self feels. at that lengh (22mm total) it is realy so hard to feel if the part twists and shears apart or if threads are cut, usualy it works good untill 8mm lnegh or so, above that i found M1 realy a pain in the Amour ;)

rodico

If that isn't available then blue map adhesive - which sounds similar - is common at stationery stores.

@@hyunsudo5666 Thank you. My hearing isn't good so I couldn't catch the name.

The screw looks large in relation to wristwatch screws.

Myford Super 7

The small one or the bug one? The big one is a Myford Super 7. Don't know what the small one is though

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