Seiko 6139 Upjewelling

Following on from @JimInOz thread on Seiko Barrel Arbor Jewels it was time to take my Seiko servicing up a notch and jewel the barrel arbors.
Still can't get my lathe working at the moment so I decided to go down the jewelling tool route with my Favorite set.


I had bought a few sets of bridge and baseplate jewels from a good Seiko source, and had purchased a suitable reamer from Cousins a while back, and my stump arrived from VTA a couple of days ago. As it was my first effort, thought I'd best break out a scrap movement to play with rather than risking a good one.


First part was simple - push out the bush from the bridge. A bit of a wipe and then push the jewel in its place. It's easy this watchmaking malarkey isn't it?


The onto the next stage - use the new stump to mount the baseplate and the reamer to open out the hole to 1.599, then use a countersink to take off the burrs from both sides and give a slight chamfer to the new hole.


So far so good. I think? After this a broach to open the hole a little more. The select a stake and use it to push the new jewel in.
Hmm. Not sure what happened. I suspect that the hole was not opened up enough? Or I used a poor selection of stake (the jewel stuck to the stake rather than going into the hole. In any case, it was not pleasant. I'll have to have a rethink and revisit it.


Any hints or tips on what I cocked up gratefully received! I'll have another play when I get a chance, but won't be until either the weekend or next week now.
Phil

Thanks - sound advice. I will be having another crack (pardon the pun) at this as soon as time allows.

I bought ten sets, meaning I now have 9.5 sets left as I can push out the bridge jewel I used and use it again!

Ok, finally got around to this... it's been a busy winter! In the scrapper movement i redid the reaming using the same technique but going a bit deeper (don't think I went far enough last time in retrospect) and then smoothed. Could do with the next set up of smoothing broaches as I was at the very end of my largest ones.
And success! Thanks everyone for the input. I've a couple more 6139's sat on the bench so will be upjewelling those next. If I get time I may service and rebuild, test and note amplitude, then upjewel and retest to see what improvement it makes. But like a lot of us, getting time to do stuff like this is probably the biggest challenge I face.