Trimming stem and installing crown on replacment movement

[Palmetto]

I'm in the process of replacing a broken 7750 movement with an Asian replica. Thanks to Edge's

great tutorial, I'm almost done. The remaining piece I haven't been able to figure out is how to replace

the plastic crown that came with the movement with the screw down crown that came with the case. I assume I'll

need to trim the stem to fit, but I have no idea how short to cut it or how to attach the steel crown.

Any help is appreciated.

Thanks,

Chris

[importr]

Can you not re-use the original stem & crown?

If not, you need small pliers to grip the flat sides of the original stem; then unscrew the crown. This will be a bit tight.

measure the stem length with a vernier caliper/gauge.

take the new stem and cut using pliers about 0.5 - 1mm longer.

use a fine file or abrasive wheel to fine trim the excess length down

use thread lock on the crown end of stem, screw crown on tightly.

and thats it!

[vric]

Since I will have a similar question (with a 44mm panerai) How do you measure if you don't have a steam to compare with?

Brand new movement, project from scratch.. How to be sure you cut at the good place ?

[HauteHippie]

Sneak up on it... In other words cut it too long, install the crown, install the stem, see how much more needs to be cut. Remove cut a little more, repeat until you get it just right. That's what I do. I think trying to get it perfect with the first cut is likely to result in a stem that is too short and unusable.

[Guest porsche356a]

Sneak up on it... In other words cut it too long, install the crown, install the stem, see how much more needs to be cut. Remove cut a little more, repeat until you get it just right. That's what I do. I think trying to get it perfect with the first cut is likely to result in a stem that is too short and unusable.

+1

[vric]

Thanks Chief

[Palmetto]

Thanks guys