Basic watchmaking tips - Oiling Part 1

Professor

I'm considering one of these new watches that has a built in cleaner, oiler, and adjuster.

Professor

I found only one site with the safety sheets for Moebius oils and it requires registration and payment for downloads.

TNTwatch

I believe registration to download from here is free: http://www.moebius-lubricants.ch/en/products/oils.

This one doesn't require registration: https://www.beco-technic.com/sicherheitsdatenblaetter?___store=en&___from_store=en.

Archer

Some time ago I posted some basic tips on cleaning to assist some of the people here who are learning watchmaking. Here is that post for reference:

https://omegaforums.net/threads/basic-watchmaking-tips-cleaning.56365/#post-696021

This is the second post on basic watchmaking tips, but this is on oiling. One of the most critical things a watchmaker does is apply lubrication to the various parts of the movement that require it. Oiling tends to become a heated topic with watchmakers, so I am just showing my way of doing things, and I’ll explain why I think they are appropriate. As always, I will listen to any well reasoned argument for a better or different way, but if anyone wants to argue for the sake or arguing, please find another thread thanks. 😉

On the topic of which oils to use, since that is often an even more heated topic, I’ll simply say that for the most part I follow the manufacturer’s recommendations. I’ve seen people argue oils endlessly, some saying they never go bad, others saying you can just use motor oil, etc. For me using modern synthetic oils that are recommended by the brands has given good results for me and my customers. If you are working on your own watches and want to conduct long term experiments with how different oils perform, that’s fine but keep in mind that’s not the situation most professional watchmakers are in. We have a duty of care to the customer, and quite frankly don’t have the time to experiment and have things potentially go wrong.

So one of the first things we need to look at is what do you need to do your oiling. For me it’s this:



I have 2 sets of oil cups with agate wells, both with individual covers on each well. You decant oil from the oil bottles using a clean probe of some kind (I use a clean, polished wire that I keep just for this purpose) and as you can see I have used a marker to write the type of oil or grease on each lid. Agate wells are preferred since they don’t get scratched easily, and having a cover on each oil well means that you only have to expose the one you are using to the air – the kind that have a cover for all 4 wells expose them all when you are just getting oil ore grease from just one, so I don’t recommend those. Of course the lid is kept closed at all times except when you are actually getting oil. I flip the lid open, dip my oiler in the oil, flip the lid closed, and apply the oil.

It’s a good idea to track how often you change the oil in your oil cups. Over time the oil will oxidize and become contaminated, so I personally change the oils every week on the same day. I realize that for a hobbyist this may be extreme, so I would recommend decanting the smallest amount of oil you can into your oil cups so you are not wasting much when you change the oils. Your oil supply should be stored in a cool, dark place.

You may also note a large white block with 2 oilers stuck in it. This block is foam that I used to clean the oiler between uses. It’s made by Bergeon, and does a much better job of cleaning the oiler than say pith wood does, and leaves no residue on the oiler like pith wood can. I do sometimes take steps to “pre-clean” my oiler after applying certain greases to save this block a bit, so for example when I’m installing braking grease in a mainspring barrel, I clean it off in another piece of foam before I stick in this block for final cleaning. I actually recycle the small square pieces of white foam that come in mainspring packages for this:



The next thing is the oilers themselves. I almost exclusively use dip oilers, so like an old quill pen I have to dip the oiler in the oil to pick up oil to apply. There are so called automatic oilers, and I do have one I use occasionally for oiling non-shock and “fixed” cap jewels, but these do have drawbacks:




These have a reservoir inside them, and a plunger that pushes oil into the space between the hole jewel and the cap jewel. The difficulty comes with properly cleaning these of old oils, and I feel they provide less control over the amount of oil applied.

So dip oilers come in different configurations. They can even be home made, but the three that I have used are the types that follow, with the first being what are commonly advertised as “Swiss made” oilers and are often sold in sets of 4 different sizes:



The tip is very bulb-like, and sometimes has small flats on the side (honestly I’m not sure if this came this way or if I stoned the flats on it at some point). Using these as they come, they are crude and I find don’t provide the control that I want. The next step up is the proper Bergeon version of these cheap oilers:



You can see that the tip is more of a fan shape, and is much more flat. These provide much more control over the amount of oil you pick up. So why is that important? The most basic way of controlling how much oil you apply, is to control how much you pick up. In many ways whatever you pick up is what will be applied, except for a small film left behind on the oiler. This is particularly true of less viscous oils, and the transfer happens almost instantly, so it’s difficult to control how much comes off the oiler – controlling how much goes on will give you more control over the whole process.

So I don’t use either of these regularly, and haven’t for a number of years now. I currently use the Bergeon “ergonomic” oiler:



As you can see, the shape of the tip is very different. First it is far more refined than the other two by a long shot – everything is finely machined where the others look like they were made using a forge and anvil. Second, the shape is much more conducive to controlling the amount of oil picked up. I have picked up some oil to show that the flat portion of the tip can pick-up a rather small amount of oil – this is the smallest of the oilers that they offer. Now these are much more expensive than the others – those a few dollars each and these are $35 or so the last time I remember buying one. They are also somewhat fragile, so over time you will bend and eventually break the tip – I just broke one I had been using for over a year this past week. But the control these provide, and the fact that when I break one I can open a new one and it will be exactly the same as the one I just used (not always the case with the others) makes these worth the money for me personally.

Not long ago I responded to someone on another forum who said they tried these and hated them. They went on to say they could barely pick up any oil with these and the oil they did pick up didn’t seem to transfer well. After some conversation it appeared that the user wanted to be able to pick up a large (for watchmaking) drop of oil and then “wipe off the excess” on the side of their oil cup. As you can probably guess, there’s no reason to do things this way when you can pick up the correct amount of oil with these right off the bat. The problem of the oil not transferring I was able to pinpoint to the user dipping the oiler too deep in the oil. If you get oil past the flat area, and get it onto the narrow part, the oiler will tend to hold onto the oil rather than transfer it. That’s why I picked up a typical amount on the photo above to show you how they are used. Once I explained all this, the user came back eventually and said they now preferred these to the older style oilers.

So this is a start on this topic but I do intend to add more as time permits.

Cheers, Al