Jump to content

First Lathe Project


Tmuir

Recommended Posts

Last night I completed my first simple lathe project for my watch repair course.

This is the first time I've used a graver on my lathe to make anything to a set dimension.

I'll be the first to admit it has a number of flaws in it and I still need to improve a lot, but for a first try I think its ok.

I started with a 1/8 inch diameter brass rod and had to turn it down to 1mm diameter for 1mm, 2mm for 2mm, 2.5mm for 2.5mm and 3mm diameter for 3mm, giving us a total length of 8.5mm.

Here are the results below.

Photo of part, I slipped facing off the end causing the scratching at the end of the larger diameter, also note the mistake at the transition from 2.5mm to 3mm caused by me squaring off the end.58f2ec25d57c4_latheproject1.thumb.jpg.a3e35132897818ce9e322f558c629444.jpg

Total diameter should be 8.5mm, mine is at 8.42mm, so 0.08mm undersize.

8_5mm.thumb.jpg.6177dadd2c7f5429773d052970eabc71.jpg

1mm diameter is at 0.99mm

1mm.thumb.jpg.1c4e24493e28e1be1c8d1a23b6a1ef4c.jpg

2mm diameter is at 1.99mm

2mm.thumb.jpg.350c75358300ba42964bbdf7ad6f8470.jpg

2.5mm diameter is at 2.49mm

2_5mm.thumb.jpg.90d64fd112448ec139015eb0d038c1b0.jpg

 

3mm diameter at 3.01mm

3mm.thumb.jpg.fad47f1389bd11ae14c65baba974ccec.jpg

 

I still need to do a lot more practice, but atleast its a start.

  • Like 2
Link to comment
Share on other sites

Certainly a good effort for a first attempt. I can only imagine my first attempt turning to those tolerances. I was how ever, casting more than a few admiring glances in the direction of your lovely JKA Feintaster...a very nice piece indeed. To bad the cost of one is so high. Definitely on my wish list.

Ron

Link to comment
Share on other sites

3 hours ago, 94marconi said:

 I was how ever, casting more than a few admiring glances in the direction of your lovely JKA Feintaster...a very nice piece indeed. To bad the cost of one is so high. Definitely on my wish list.

Ron

I got lucky with the JKA.
I was on holidays in the UK last year and on my tablet saw it been listed from Germany with a BIN of around £75 and snapped it up very quickly as they usually sell for 2 times or more than that. I bought a few tools, books, a couple of clocks and watch movements on that trip, but this was definitely my best buy of the trip.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • I think attaching a nut to the lid to pull it off is the least destructive, any damage damage on the outside is going to an easier fix than any created when trying to push it out from the inside. Scratching up the inside of the lid , mainspring or arbor bearing will be risk. Just my opinion.
    • yes the things we read in the universe I did see some where it was either difficult to clean off or it contaminated the cleaning fluid there was some issue with cleaning. I was trying to remember something about grease where as opposed to a substance of a specific consistency they were suggesting it had a base oil with something to thicken it. That conceivably could indicate that the two could separate and that would be an issue. But there is something else going on here that I had remembered so I have a link below and the description of the 9501 notice the word that I highlighted? Notice that word appears quite a bit on this particular page like 9415 has that property all so they 8200 mainspring grease and that definitely has to be mixed up when you go to use it because it definitely separates. just in case you didn't remember that nifty word there is a Wikipedia entry. https://en.wikipedia.org/wiki/Thixotropy   https://www.moebius-lubricants.ch/en/products/greases I wonder if what you're seeing is the boron nitride left behind after cleaning. In other words it's the high-pressure part of the grease and it's probably embedding itself into the metal which is why it doesn't clean off and shouldn't be a problem?
    • Yes and no. I use Moebius 9501 synthetic grease and it is significantly runnier than the Moebius 9504 synthetic grease (and I assume Molykote DX) that I previously used. I haven't seen 9504 spread and it is in my opinion the best grease money can buy. However, my current method of cleaning doesn't remove it from the parts, so that's why I have decided to use the 9501 instead. I believe I read somewhere that Molykote DX too is difficult to clean off. Thinking about it, I'm pretty sure my 9501 grease which expired in June 2022 is runnier now than it was when it was new, but whether new or old it always needs to be stirred before use. So, that's why I treat the parts of the keyless works, cannon pinion, etc. with epilame. That was very thoughtful of you and something that had completely passed me by. Not sure what the epilame will do when it wears off in a non-oiled hole. Anyone?
    • Hi not found one either yet,  close relative is the 436 and 4361 according to ranff.db.   It gives quire a lot of detail but not as good as the old site.      RANFF.DB.
    • No problem to replace the setting with the staking set. Press the new setting from inside, use flat face punch with hole. The punch must be wider than the setting, the hole to be as not to press at the stone, but only on the bush. Press by hand until the setting gets flush with the plate surface, so the punch must rest on it.
×
×
  • Create New...