Repivoting technique #1, collet holding lathe, free hand
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- Опубликовано: 21 окт 2020
- This is one of a couple techniques I use in repivoting. Shown in this video is a 4th wheel of a Zenith pocket watch. I use a standard American style 8mm collet holding lathe for the whole process, to repivot and finish the new pivot.
C. Mullebrouck
As watchmaker repair, and collector of Roskopf pocket watches, I highly appreciate very much your knowlege. You are an Artist with the big A.
Nice video, thanks.
Also greasing the bit/drill everytime you take the chips out, is a good idea, and keep low rpm, to avoid metal to harden
Thank you! Very well made video. I look forward to seeing a video on making the carbide drill bit.
Wow! Very clever method! And the concentricity looks pretty impressive for such a tiny part! If you haven't already done it, I'm very interested in how you made your carbide drill!
I work often with a .5mm drill bit, never thought id see an almost .3mm pivot being made after the relevant hole being made. As i also work with small things😂 hobby model trains. Very interesting the tools used, great video thanks for showing
Excellent video. Anxious to see the others mentioned.
Amazing! Nice job!!!
Wonderfully done. Great
This vid is already 1 year old when i comment this. Just wanna say thank you very much for showing the technique!
Excellent video, thanks! Phil
Thanks for sharing your experience and clarity of perspective with your work step by step! Excellent video!
Very interesting and informative, many thanks.
Very impressed. You make it look easy.
Thank you for sharing
bravo! this is real watchmaking!
You are awesome. Thanks for sharing
Excellent thanks
Very good video thanks
I would definitely like to see you make a drill bit.
Great video
You are the best 👌
Very good video 👍
Inspired by your video I am trying to pivoting an escape wheel of Marine clock but the job is very critical to me as I am now 70+ n doing with hand made drill .
Great video btw
Belo trabalho!
Fantastic
While I am not a jeweler, I do like the exacting technique.
Props👏
Nice video, thanks for sharing!
I was taught that diamond rubberized abrasive might embed diamond particles in the pivot and cause excessive jewel wear over the time.
A very legitimate point. Aware of this when using the old diamantine or sapphirine powder on a wood lap, I for years finished pivots with a jasper stone. Recently though I became familiar with another watchmaker who did his final touch up with a cratex style rubberized abrasive. The finish he achieved was better, so I reconsidered.
The way to think of it is this, the abrasive will embed itself in the softer material and cut the harder material. If the rubber already has the abrasive in it, it shouldn't embed in the steel pivot unless you are rubbing it so much to as to heat things up and produce a lot of rubber/eraser shavings. A quick swipe or two at the very end, then properly cleaning it should eliminate any potential of contamination.
I am aware of instances of worn jewels where diamond or sapphire powder was used for polishing a pivot. I am not aware of cases where other solid or fixed abrasives have caused wear. I guess time will tell.
Superb video. And very useful explanations. It took me a lot to figure out what to do about the wobble out effect you mentioned. If you were here 3 years ago it would have saved me a lot of time really. also waiting for you to reveal the secret of making carbide drills thinner than 0.3mm
ruclips.net/video/jgw8zxFirVU/видео.html
Great technique! Would love to see how you make a carbide bit. I tried using the long drills and they keep snapping. 😳
Making a drill bit would be cool.
Great
Nicely done. That jewel hole gauge is brilliant. Will have to keep an eye out at the two markets the Australian Antiquarian Horological Society hold each year and ask around :) I'm a member. With the sapphire file, did you put a texture across it with Carborundum paper or some such? It caught me out for a bit, trying to work out what I was looking at, as I could see the object you were working on.....but could also see the edge of the file 'through' the work :D Cheers
I textured the sapphire file with finest diamond lap I had.
Good luck finding a jewel guage. Most people here in the states who deal with used tools don't know what they have. I've bought them as cheap as $10, but have no problem selling them for $100 on ebay. It's all about knowing what you have and how to use it.
unreal! if things are so tiny, does anger when something goes wrong is as little as well :)
(smiles) If someone is easily frustrated, watchmaking is not the occupation for them.
Have a 16s 4th wheel that needs this…… practicing on junkers. Here goes
Good luck!
Super kalm voice
Wow, how do you hold your hand so steady to work on such fine details? Do you have any tips or techniques you could pass on to try? Also very interesting video. Thanks for sharing.
The trick is to have your hand resting on it's side. If you're supporting the hand with your forearm or whole arm, your hand will shake.
@@repivot2253 Thanks for the response, like I said before, very interesting stuff.
Can you please show making the drill? Thanks!
I’m interested in too
Me too
yes please
Me also please
That would be very helpful and kind of you regards
Excellent Work! What kind of camera system do you use?
Samsung Galaxy Note 3.
Do you think a notch for the drill in the tool rest, properly adjusted of course, would help to guide the drill straight into the arbor? I’m sure I’m not good enough to freehand it in as straight as you did.
Freehanding a concentric hole into the end of a spinning shaft is surprisingly much easier than it sounds. Of course, it does require some practice and a soft touch, but even the tiniest bit off-center and you can feel it through the tool. Doing it this way, you’ll find yourself breaking far fewer drills, so long as you’re going slow and paying attention to the feel of the tool. And he is right, clearing chips very frequently is extremely important.
After butting your watch together does the wheel you repaired center itself between the plates. It seems like there might be some drag where the staff end because it is flat.
No issues.
Very nice and precise work, a question. I've been looking for that Jeweling Gauge online but have a hard time coming across one. Is there a specific brand name associated with this tool? Any info is much appreciated.
There are different kinds of jeweling gages. Which kind are you looking for? The tapered pin variety for measuring inside diameter? Or a pin set of different dimensions to also measure I.D.? Or a plate with different sized jewels for measuring different pivot sizes?
Intresting. What is the consensus of tolerance between the jewel and pivot?
Excellent question. In smaller wrist watch wheels and all balance wheels, it should be .01mm. Train wheels in pocket watches like this I accept as much as .02mm.
@@repivot2253 Thank you for youre answer sir!
Back in the, well almost black and white tv days. I was a toolmaker. Have recently picking up on my watchmaking intrest. Starting on service wristwatches for my own enjoyment. And trying to learn more on tooling and maschining repairs. Have a Simonet lathe that is similar to the Schaublin 105. But needs a little overhaul. And dusting off.. Bit to big for most work. So Im hoping to find a resonable 6 or 8mm collets lathe.
Really like youre efforts making youre own cutting wheels ect! 👌
Did u make the video on making the drill bit? I'm interested...
ruclips.net/video/jgw8zxFirVU/видео.html
Здравствуйте, расскажите как сделать прозрачный напильник.
I need to drill 0.30mm x10 mm long in En52100 material. I get deflection at the opening hole . Please suggest how I should drill cencentrically?
If you strike the center like I demonstrate in this video that will help get the drill started on center. Be careful so within the cut center you don't have a little bump. This will throw the drill off center. The center you strike should be a perfect concave cone about the diameter of the drill or less.
If you do have this and the drill cuts off center, the problem is your drill bit. Only one side of the center is cutting. Resharpen you drill bit, making sure the angles on both sides of center are equal.
Good luck. That's a deep hole. I'm not familiar with the material you are drilling.
Hello, very interesting, but I am interested in where to buy this measuring instrument. Thank you. Isidore.
The jewel guage sometimes refered to as an Obama guage can be found occasionally on eBay. Expect to pay $100 from a seller who knows what he has. Sometimes people won't know what they have and you may get it cheaper. Also if there are local watch collector clubs or meetings you may find it among the vendors. Most people don't know what its for.
@@repivot2253 thank you very much, I will be looking.
I have an antique english high grade M I Tobias pocket watch movement with a broken center wheel staff and I don't know if it can be repaired or needs a new one
It is possible to repivot the center wheel, but might be quicker to replace the whole pinion if you can find a matching one. I would be willing to try if you are willing to wait months for its completion.
@@repivot2253 I actually have two english pocket watch movements, the one I've just told you about and a John Moncas whose mainspring barrel cover doesn't close tight and it pops out everytime I wind it up, so, I don't know what's wrong with the piece
Making a drill bit
Should use cutting oil
Why do you use piano wire ? and not blued steel? im a beginner in watchmaking
Blued steel would be too hard and brittle, very difficult to cut. Piano wire is hardened, but then tempered enough to be cuttable, but still strong enough for the job.
What type of dill do you use?
I make my own drills out of carbide tipped dental burrs.
Where did you get the drill bits, please
I make my own from carbide tipped dental burs. Stay tuned as I'll make a video on this sometime in the future.
@@repivot2253 but, where do you get these bits that you turn into pivot drills? Please
@@JDRichard for several years my dentist saves the old dull bits for me. When I came in for a cleaning every 6 months, there'd be a little baggie of them for me to take home. I have a lifetimes supply now.
I'm sure if you Google carbide dental burr, you'd find a source.
@@repivot2253 Very good approach. I have a dentist appointment on Thursday and will ask if they have any leftover bits...or simply buy some new ones:). Thanks by the way.