watch case back polishing - YES or NO? - Seiko & Citizen Watch Forum Japanese Watch Reviews, Discussion & Trading
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Old 08-30-2017, 04:19 PM   #1 (permalink)
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Default watch case back polishing - YES or NO?

Hello - I was contemplating cleaning up the back of this case back which shows marks from the opening tool. It's a nice 4004 and wanted input on:

- should I just leave it?

- if its worth cleaning up, what would be the best way to do it?

None of the marks are too deep so imagine it would be a straightforward job.

Looking forward to your thoughts.
thanks
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Old 08-30-2017, 04:42 PM   #2 (permalink)
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The hardest part would be getting the circular brushing back. I wouldnt do it unless you would be able to replicate the original finish again.
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Old 08-30-2017, 04:50 PM   #3 (permalink)
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agreed - getting the marks out might not be bad, but getting the circular finish back in ....

Wondering if anyone has technique they'd be willing to share. I've got a couple old backs I could experiment with - wonder how a Scotch Bride pad would work while rotating the back in a circular motion?
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Old 08-30-2017, 05:09 PM   #4 (permalink)
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Often wondered if I could find a chuck like those on a lathe but for a drill. The chuck that opens up to hold something rather than clamp onto.
That with a scotchbrite might work.

Sent from my Honor 5c
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Old 08-30-2017, 05:47 PM   #5 (permalink)
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I had the same idea. Actually, if I cut a round piece of Scotch Bride and glued it to a Dremel cutting wheel (flat surface) and went at very slow speed that could work. Just basically making a rotating Scotch Brite pad. Hmmmm. I think a little shop time is in order.
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Old 08-30-2017, 11:16 PM   #6 (permalink)
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Aloha ,
The Scotch Brite would only buff it down more. The Circular marks has to be done individually with a fine
pointed tool that would fit into the grooves to .... Retrace the Markings again and that would make it deeper and more difficult
but it would cut deeper then penetrate the Material of the Present Case Back.

Case Back Emblems are individually stamped before the machining if done on many , then machined towards the outer side of the material for use.
If you look at them closely. The case back starts out ... ( Thick , Stamped ) ....Then machined down to proper .... Depth then machined outward
then high speed polishing or machining is done for that.

Note: If you would notice the Circular Markings ...are not continuous but are ... Individual Rings and all are separated.
__________________________________________________ ____________
Possibly the ....Milling Tool that they used had ...Individual Cutting Edges to
create those makings.

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Old 08-30-2017, 11:49 PM   #7 (permalink)
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I'd leave it as is!
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Old 08-31-2017, 02:24 AM   #8 (permalink)
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LongBike - thank you for the great information. Knew none of that. Hadn't invested anytime into this so appreciate you sharing this information.

I'll leave it be - the marks are the history of the watch. I could see screwing it up rather than making it better - thanks guys!
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Old 08-31-2017, 12:31 PM   #9 (permalink)
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Mountable scotch bright pads are available. And the mandrel could be chucked in a drill. (Edit)

The circular machining marks are one continues spiral produced by a face cut on a lathe. It takes moments. The "pitch" would be determined by the feed rate.

Sent from my E6790TM using Tapatalk

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Old 08-31-2017, 04:13 PM   #10 (permalink)
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interesting - what kind of finish does this Scotch Brite pad produce on SS?

Here is the front of the watch. Nothing too special but a pretty Quartz that keeps good time and looks good on a lizard band. 4336-8090. 1977.
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