- 14/12/20
- 634
- 655
- 93
Hey Guys, I'm trying to do what I thought would be a simple operation. Namely, cut down the winding stem from a 116710 SH3186 movement about 1mm for better fitment into the movement (stem is a tad too long and won't allow the crown to fully screw flush to the case) . As such, I'm trying to unscrew the stem from the crown so I can file off some material from the top of the stem. However, the stem doesn't seem to want to budge, and I'm afraid to force it for fear of breaking the stem. I tried heating up the stem/crown to 300 Celsius with a precision heat gun, but it didn't seem to help matters. The stem/crown assembly is currently sitting in a pin vise and I'm grabbing the knurling of the crown by hand and trying to turn CCW. Is there a better technique? Any suggestions on how best to unscrew without breaking the stem would be much appreciated!