Novodiac Spring size

[Danh]

Hi Folks

would anyone know the novodiac Spring size for the ETA 2836 please.

cousins list them as 1.25mm 1.45mm 1.60mm and 1.65mm

as ever, many thanks for your help

[clockboy]

My GR ref:book does not have the ETA 2836. However Cousins suggests GR 3149-X
The strange thing is Cousins quotes a different size to the GR book the size of a  GR 3149-X is    1.25 - 0.125  - 420 - 12

https://www.cousinsuk.com/category/eta-esa-movement-parts

 

If you have the old spring it will be worth measuring it or give them a call.

[jdm]

I think the OP is talking about this

[clockboy]

Ok sorry thought it was a mainspring issue. This pdf explains how the different springs are identified but does not show how to measure. The sizes might relate to the total diameter of the springs or the recess hole size.

KIF shock springs.pdf

Orfei have them for the ETA 2386 see below

http://www.ofrei.com/page1438.html

Sent from my iPhone using Tapatalk

[Danh]

Thanks for the help guys, most appreciated

[Danh]

And finally life has allowed me to return to this.

so back to business

does anyone have a tip for fitting these Novodiac springs, there is a tool available, but tips from pros are often much better.

thanks in advance

Dan

[bobm12]

Hi Dan,

You can hollow (make a little dome like indentation/hole in) a wood stick (peg) to the right dimensions so that the edges of the stick match the spring diameter. That would be the tool for inserting the novodiac spring...if you don't feel comfortable using two tweezers...which I do.

Cheers,

Bob 

[Danh]

Thanks Bob

most appreciated, great idea

[bobm12]

Correction Dan, the diameter of the stick/peg "indentation" is the actual diameter of the spring housing....i.e. the spring will "dome" into the peg and as you rotate it, it will get into position and lock in (there is a groove where it fits in).

[Danh]

Thanks again Bob, going to try this later, it's a new spring and the tweezers are not working for me yet

Dan