Jump to content

ETA 2789 automatic framework


marco1uk

Recommended Posts

Hi all

I've almost finished the service on my Rado Diastar and was starting to put the automatic works back together and noticed the post for the first reduction wheel was missing.

Looks as though it was loose and the ultrasonic vibrations popped it out.

I have a spare automatic framework, but will I need to use a jewelling tool or staking tool to remove and refit the post?

I've bought a replacement part from the US, however, surprise surprise,  it's not here yet.

All thoughts on my question humbly received. 

Kind regards, 

Peter Bolan

Link to comment
Share on other sites

58 minutes ago, marco1uk said:

Hi all

I've almost finished the service on my Rado Diastar and was starting to put the automatic works back together and noticed the post for the first reduction wheel was missing.

Looks as though it was loose and the ultrasonic vibrations popped it out.

I have a spare automatic framework, but will I need to use a jewelling tool or staking tool to remove and refit the post?

I've bought a replacement part from the US, however, surprise surprise,  it's not here yet.

All thoughts on my question humbly received. 

Kind regards, 

Peter Bolan

It would be helpful to see a photo of the reduction wheel and the spare automatic unit.

Btw, why not to enjoy your watch as "manual wind" until you get your replacement part from the States?

Link to comment
Share on other sites

1 hour ago, marco1uk said:

Here's a couple of pics to hopefully show what I mean

Yea, i see what you mean. I believe it's called "Automatic Ratchet Wheel Driving Wheel ( 1482 ), ETA 2770"

ETA27701482  £5.96

Which replacement part did you order? Automatic Framework Device ( 1143 ), ETA 2770 ETA27701134 ?

 

Yes, you will benefit from using Staking tool if you would like to transfer the post / pin, whatever the proper name.

Link to comment
Share on other sites



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • I'm assuming that every time you set the watch you are work hardening the detent spring, maximum hardening is  where it meets the plate due to maximum deflection.   That's why it snaps there.  The Young's modulus may be the same but after it's reached its maximum yeid strength it breaks.  My mechanic engineering is very rusty, correct me if I'm wrong. 
    • Ah ok yes that makes sense to polish it where the arm starts to form from the body of the bridge, i thought you meant the underneath of all the arm.
    • this is something I've never quite understood about the some of the Swiss companies. In 1957 Omega was using 9010 for the keyless parts with epilam. there's been a slow migration towards using heavier lubrication's but still typically oils and epilam to keep them in place. When it seems like 9504 works so much better.  
    • OK, welcome in the world of alarm clocks... I guess the 4th wheel is dished because it is from another movement. If it was not dishet, then it would not mesh with the pinion of the escape wheel, am I right? The marks of wear on the 4th wheel pinion doesn't corespond to the 3th wheel table position, at list this is what i see on the picts. Calculating the rate is easy - there is a formula - BR = T2 x T3 x T4 x T5 x 2 /(P3 x P4 x P5) where T2 - T5 are the counts of the teeth of the wheels tables, and P3 - P5 are the counts of the pinion leaves. Vibrating the balance is easy - grasp for the hairspring where it should stay in the regulator with tweasers, let the balance hang on the hairspring while the downside staff tip rests on glass surface. Then make the balance oscillate and use timer to measure the time for let say 50 oscillations, or count the oscillations for let say 30 seconds. You must do the free oscillations test to check the balance staff tips and the cone cup bearings for wear. This kind of staffs wear and need resharpening to restore the normal function of the balance.
    • Glue a nut to the barrel lid, insert a bolt, pull, disolve the glue.  Maybe someone will have a better answer. 
×
×
  • Create New...