Jump to content

Vintage Homemade Crystal Press.............refurbished.


Geo

Recommended Posts

I purchased a cheap Chinese crystal press when I took up watch repairing/refurbishing a few years ago, this was one of the lever operated type with nylon dies. This has served me very well, but there are some jobs that a screw type of press is far better for because of the more sensitive control.

Being a canny Scot, I kept an eye on eBay for a second hand Robur or Horotec and stumbled across this antique home made press for £14 delivered.

post-124-0-00007400-1435348982_thumb.jpg

The engineer in me immediately saw the potential, all it needed was stripped down, modified to take new dies and repainted.

The other thing that was required was a set of new aluminium dies, so after a search on AliExpress I purchased these for £26 delivered from China.

post-124-0-76073200-1435349243_thumb.jpg

Right, down to business.

(1) Modify the lower die holder to accept the 6mm threaded alloy dies.

post-124-0-94920900-1435349432_thumb.jpg

(2) Make an adaptor to fit the bottom of the ram with a 6mm thread to take the dies.

(3) Machine the lower end of the pillar to give clearance for the largest die.

post-124-0-36916600-1435349599_thumb.jpg

(4) Accurise the dies to ensure that the faces are parallel. Many were slightly out of truth.

post-124-0-32890100-1435349819_thumb.jpg

post-124-0-79416000-1435349919_thumb.jpg

(5) Remove paint and rust from press, paint and polish.

post-124-0-97095300-1435350044_thumb.jpg

(6) Reassemble.

post-124-0-37129700-1435350123_thumb.jpg

Total cost of complete set £40.................well pleased!

post-124-0-85889900-1435350317_thumb.jpg

post-124-0-51590900-1435350248_thumb.jpg

  • Like 10
Link to comment
Share on other sites

PS didn't know you had a lathe. Wish I had room for one

Wouldn't be without it CB, I also have a lightweight milling machine. I put together a machine shop when I was building target pistols many years ago, now it so handy for both my motorcycle and horology interests.

post-124-0-45203200-1435391763_thumb.jpg

post-124-0-66002600-1435433663_thumb.jpg

  • Like 4
Link to comment
Share on other sites

  • 2 weeks later...

Looks great Geo, nice work. It reminds me that I bought a press very similar to yours meaning to convert it to take various dies I already have. You've inspired me to have another look at it, although I'll have to try and figure out a way to do it without the use of any similar equipment :). Not that easy when you're not particularly mechanically minded! Thanks for sharing.

Stephen

  • Like 1
Link to comment
Share on other sites

  • 4 weeks later...

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

    • They are for balance wheels only and wheels with similar pivots (B = bombé). You can use flat jewels for balance wheels (not recommended)  but no bombé jewels for ordinary wheels.
    • Not SS but very slight wear on the underside edges have a little brass showing under magnification. New crystal arrived £3 with tax. Nice champagne dial color.
    • I also just realized I had that tech bulletin saved...but in French for some reason 🙂 No, I don't speak French. 2172_Bulova 11AOAC 11AOACD 11AOACB.pdf While parts are drying I'm on the hunt for a replacement crystal. I can measure the opening and get a generic one, but it'd be nice to find out what the original looked like first. Of course, case code 3093 does not appear in any of my reference materials. JulesBorel lists a C3093 case code, and shows Bulova part # 1222-5. Does anyone have information on this guy? I found a thread here talking about how the -5 is the height of the crystal, but that's as far as I've gotten. I also found one site that claims to have it in stock, but before I risk my $20 I'd like to confirm it's the right part.  
    • Thanks for the replies. I did the job today and found that the oversized stem fitted just perfectly into the worn mainplate without any adjustment. Original stem diameter was 1.24mm and the oversized was 1.40mm. I did have to make an adjustment to the setting lever though. The small pip that engages with the groove in the stem hub was slightly to wide. I made that a bit smaller with a fine file. Don't ask me why that was too big, it just was. All working very well now. No wobble and not pulling out. New crown fitted as good measure.
×
×
  • Create New...